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    1. Results

      NonPatientCell: EFO:0001182 (HEK293 Cells)

      GeneFunction: GO:0008233 (Peptidase activity)

      GeneAlteration: HEK293 cells were grown and 8 missense mutations were identified and generated by PCR-mutagenesis. The human mutant cDNAs were transfected into the cells using the calcuim-phosphate coprecipitation method and examined.

      FunctionalEvidence: When HEK293 cells were transfected with wild-type and mutant human cDNA for PHEX, the resulting cells were subject to immunoblotting to determine the protein levels in both the cell lysate and the media of cells. All the variants and the wild-type showed presence in the lysate at various levels, but C85R, G579R, G579V, S711R, and A720T were all devoid of any secreted protein in the media. Ananlysis of these cells also showed possible rescue by growing transfected cells at 26 C, thus glycosylating and maturing the proteins. The endopeptidase activity of the wild-type and variants were also compared, with D237G and Y317F mutant proteins exhibiting 50–60% of wild-type activity; E581V and S711R also displayed nearly undetectable activity. This displayed that the disease causing mechanism could be related to loss of function of peptidase activity or cellular trafficking. Evidence is found under "Results".

      FAVariant1: NM_000444.5:c.253T>C (p.Cys85Arg)

      ClinVar: 438549 https://www.ncbi.nlm.nih.gov/clinvar/variation/438549/

      FAVariant2: NM_000444.5:c.1735G>A (p.Gly579Arg)

      ClinVar: 226119 https://www.ncbi.nlm.nih.gov/clinvar/variation/226119/

      FAVariant3: NM_000444.5:c.1736G>T (p.Gly579Val)

      ClinVar: 372777 https://www.ncbi.nlm.nih.gov/clinvar/variation/372777/

      FAVariant4: NM_000444.5:c.2131A>C (p.Ser711Arg)

      CAID: CA412575294 https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA412575294

      FAVariant5: NM_000444.5:c.2158G>A (p.Ala720Thr)

      CAID: CA412575364 https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA412575364

    1. The clinical application of a new, widely applicable method known as Karyomapping to carry out a total of 55 clinical cases of preimplantation genetic diagnosis (PGD) for single gene disorders is reported.

      Unable to annotate on article.

      Case#: Konstantinidis Case 2

      DiseaseAssertion: optic atrophy

      FamilyInfo: none provided

      CasePresentingHPOs: none, tests performed on blastocyst

      CaseHPOFreeText:

      CaseNotHPOs: none

      CaseNotHPOFreeText:

      PreviouslyPublished: n/a

      Variant: c.182A > G

      ClinVar: 511815

      CAID: CA2758946

      SupplementalData: n/a

    1. II:5. A 66-year-old woman had had visual impairment since childhood and had attended a special school for the blind. She presented with a further slowly progressive deterioration in her visual acuity, a progressive gait disturbance of 20 years duration, and a 5-year history of deteriorating hearing. Shortly after presentation she developed acute paranoid delusions, low mood and visual hallucinations which resolved spontaneously. On examination, she was just able to perceive light and had bilateral optic atrophy. There was a complete external ophthalmoplegia, bilateral ptosis and bifacial weakness. Her gait was ataxic, tendon reflexes depressed and plantar responses flexor. Clinical investigations revealed an elevated serum creatine kinase (417 U/l, normal <190 U/l) with a normal fasting blood glucose and lactate. An electrocardiogram showed left axis deviation but an echocardiogram was normal. A chest X-ray and pulmonary function tests were normal. An EEG revealed evidence of a mild cortical disturbance. Brain MRI revealed mild cortical and cerebellar atrophy, and prominent small-vessel ischaemic lesions in the cerebral white matter bilaterally.

      Case#: Hudson Proband II:5, 66yo, female, UK

      DiseaseAssertion: OA plus

      FamilyInfo: Pedigree (Fig 1) shows 6 segregations

      CasePresentingHPOs: HP:0007663, HP:0001288, HP:0001730, HP:0000746, HP:0002367, HP:0000648, HP:0000544, HP:0001488, HP:0001349, HP:0002066, HP:0001315, HP:0003236, HP:0033568, HP:0001272, HP:0002120

      CaseHPOFreeText: slowly progressive deterioration in her visual acuity, a progressive gait disturbance of 20 years duration, and a 5-year history of deteriorating hearing, acute paranoid delusions, low mood, just able to perceive light, bilateral optic atrophy, plantar responses flexor, elevated serum creatine kinase (417 U/l, normal <190 U/l) with a normal fasting blood glucose and lactate, mild cortical disturbance, prominent small-vessel ischaemic lesions in the cerebral white matter bilaterally. Muscle biopsy of the index case (II:5) revealed features that were diagnostic of mitochondrial myopathy

      CaseNotHPOs: HP:0001627, HP:0031983

      CaseNotHPOFreeText:

      PreviouslyPublished: n/a

      PreviousTesting: The entire mitochondrial genome-coding region was amplified and found (m.8839G>A) in the MTATP6 gene. No sequence variants were identified in the coding region or flanking exon–intron boundaries for POLG1, PEO1, POLG2 and SLC25A4.

      GenotypingMethod: The 30 coding exons and intron–exon junctions of the OPA1 gene were sequenced using a set of 30 primer pairs

      Variant: c.1800C>G (p.Ser600Arg)

      ClinVar: 30461

      CAID: CA10575554

      SupplementalData:

    1. Case: 8

      DiseaseAssertion: hypertrophic cardiomyopathy, Left ventricular hypertrophy

      FamilyInfo: Finnish, no family info

      CasePresentingHPOs: HP:0001639, HP:0001712

      "hypertrophic cardiomyopathy, Left ventricular hypertrophy"

      CaseHPOFreeRext:

      CaseNOTHPOs:

      CaseNOTHPOFreeText:

      CasePreviousTesting: 24 h Holter registration and bicycle ergometer test performed in majority of patients. Cardiac magnetic resonance imaging was performed to verify the diagnosis of HCM

      GenotypingMethod: Targeted next-generation sequencing of exons, UTRs and 10 bp flanking regions of 59 cardiomyopathy associated genes, filtered variants confirmed by Sanger sequencing

      MultipleGeneVariants:

      (1) LAMA4 Variant: c.2593C>G (unknown HGVS descriptor)

      ClinVarID: unknown

      gnomAD: unknown

      (2) MYH7 Variant: NM_000257.4:c.3158G>A

      ClinVarID: 155814

      gnomAD: http://gnomad.broadinstitute.org/variant/14-23891476-C-T

      Total Allele Frequency: 0.0000601 European (Finnish): 0.0006368

      PreviouslyPublished:

      SupplementalData: Table S3: list of all 382 patients with HCM included in the FinHCM Genetic Study, and the rare variants (GMAF <1%) detected in each patient.

    2. Case: 2

      DiseaseAssertion: hypertrophic cardiomyopathy, Left ventricular hypertrophy

      FamilyInfo: Finnish, no family info

      CasePresentingHPOs: HP:0001639, HP:0001712

      "hypertrophic cardiomyopathy, Left ventricular hypertrophy"

      CaseHPOFreeRext:

      CaseNOTHPOs:

      CaseNOTHPOFreeText:

      CasePreviousTesting: 24 h Holter registration and bicycle ergometer test performed in majority of patients. Cardiac magnetic resonance imaging was performed to verify the diagnosis of HCM

      GenotypingMethod: Targeted next-generation sequencing of exons, UTRs and 10 bp flanking regions of 59 cardiomyopathy associated genes, filtered variants confirmed by Sanger sequencing

      MultipleGeneVariants:

      (1) MYH7 Variant: NM_000257.4:c.3158G>A

      ClinVarID: 155814

      gnomAD: http://gnomad.broadinstitute.org/variant/14-23891476-C-T

      Total Allele Frequency: 0.00006010 European Finnish: 0.0006368

      (2) MYBPC3 Variant: NM_000256.3:c.440C>T

      ClinVarID: 181035

      gnomAD: http://gnomad.broadinstitute.org/variant/11-47371630-G-A

      Total Allele Frequency: 0.0005896 European (Finnish): 0.005563

      (3) MYOZ2 Variant: NM_016599.4:c.738A>G

      ClinVarID: 30509

      gnomAD: http://gnomad.broadinstitute.org/variant/4-120107298-A-G

      Total Allele Frequency: 0.0023 European (Finnish): 0.02188

      (4) PSEN2 Variant: NM_012486.2:c.211C>T

      ClinVarID: 192130

      gnomAD: http://gnomad.broadinstitute.org/variant/1-227071475-C-T

      Total Allele Frequency: 0.003711 European (Finnish): 0.01791

      (5) SCN5A Variant: NM_000335.4:c.1715C>A

      ClinVarID: 67683

      gnomAD: http://gnomad.broadinstitute.org/variant/3-38645378-G-T

      Total Allele Frequency: 0.005175 European (Finnish): 0.03855

      PreviouslyPublished:

      SupplementalData: Table S3: list of all 382 patients with HCM included in the FinHCM Genetic Study, and the rare variants (GMAF <1%) detected in each patient.

    1. One is a novel 5-bp insertion between the thymidine at nt 704 and a cytosine at nt 705 (704ins5), which is seen only in the Japanese population.

      annotating here since this is a PDF

      Case#: Yamagishi Case 2, female, 10m at dx

      DiseaseAssertion: Hurler

      FamilyInfo:

      CasePresentingHPOs:

      CaseHPOFreeText: mental delay. height=70cm

      CaseNotHPOs: HP:0002240

      CaseNotHPOFreeText: cardiac involvement

      PreviouslyPublished: n/a

      Variant: 704ins5/704ins homozygous

      ClinVar: 11921

      CAID: CA256123

      SupplementalData: n/a

    2. One is a novel 5-bp insertion between the thymidine at nt 704 and a cytosine at nt 705 (704ins5), which is seen only in the Japanese population.

      annotating here since this is a PDF

      Case#: Yamagishi Case 3, female, 3y4m at dx

      DiseaseAssertion: Hurler/Scheie

      FamilyInfo: Case 4 is this patient's sibling. Same genotype and similar phenotype

      CasePresentingHPOs: HP:0001433

      CaseHPOFreeText: height=90cm (-1.2SD)

      CaseNotHPOs:

      CaseNotHPOFreeText: mental delay. cardiac involvement

      PreviouslyPublished: n/a

      Variant: 704ins5; R89Q

      ClinVar: 11921; 11922

      CAID: CA256123; CA256124

      SupplementalData: n/a

    3. One is a novel 5-bp insertion between the thymidine at nt 704 and a cytosine at nt 705 (704ins5), which is seen only in the Japanese population.

      annotating here since this is a PDF

      Case#: Yamagishi Case 1, female, 3y1m at dx

      DiseaseAssertion: Hurler

      FamilyInfo: consanguinity

      CasePresentingHPOs: HP:0002240

      CaseHPOFreeText: mental delay. height=89cm (-1.5SD)

      CaseNotHPOs:

      CaseNotHPOFreeText: cardiac involvement

      PreviouslyPublished: n/a

      Variant: 704ins5/704ins homozygous

      ClinVar: 11921

      CAID: CA256123

      SupplementalData: n/a

    1. KMP 1

      Case#: KMP 1, female, 39 yrs, East Slovakia

      DiseaseAssertion: HCM

      FamilyInfo: n/a

      CasePresentingHPOs: n/a

      CaseHPOFreeText: symptomatic; LVEF 60%; NYHA I.; ECG; echocardiography

      CaseNotHPOs: n/a

      CaseNotHPOFreeText: no LVOTO; no ICD

      CasePreviousTesting: Additional Sanger sequencing of exons 12, 24, 25 of MYBPC3, exon 12 NEBL, exons 12, 20, 21 of SCN5A, exon 7 of TNNI3, and exon 9 of TNNT2 gene

      CaseGenotypingMethod: Sanger sequencing

      Variant: NM_000257.4(MYH7):c.2845G>A (p.Glu949Lys)

      ClinVar: 14093 https://www.ncbi.nlm.nih.gov/clinvar/variation/14093/

      CAID: n/a

      gnomAD: absent

    2. KMP 16

      Case#: KMP 16, female, 60 yrs, East Slovakia

      DiseaseAssertion: HCM

      FamilyInfo: n/a

      CasePresentingHPOs: n/a

      CaseHPOFreeText: symptomatic; LVOTO yes; LVEF 39-40%; NYHA I.; ICD yes; ECG; echocardiography;

      CaseNotHPOs: n/a

      CaseNotHPOFreeText: n/a

      CasePreviousTesting: Additional Sanger sequencing of exons 12, 24, 25 of MYBPC3, exon 12 NEBL, exons 12, 20, 21 of SCN5A, exon 7 of TNNI3, and exon 9 of TNNT2 gene

      CaseGenotypingMethod: Sanger sequencing;

      Variant: NM_000257.4(MYH7):c.2845G>A (p.Glu949Lys)

      ClinVar: 14093 https://www.ncbi.nlm.nih.gov/clinvar/variation/14093/

      CAID: n/a

      gnomAD: absent

    1. N5214F6212 monthsBulbarNop.Thr349Serc.l045A>T

      Case#: N5214, F, 62 y.o., Italian

      CasePresentingHPOs: HP:0007354, HP:0002015, HP:0001260, HP:0002380, HP:0003690, HP:0003202

      CaseNotHPOs: HP:0100543

      CaseGenotypingMethod: Sanger sequencing

      Variant: NM_006000.3(TUBA4A):c.1045A>T p.Thr349Ser

      CAID: CA350723588

      CaseAddInfo: While most cases were found to be negative during pre-screening for known mutations, some cases were positive for mutations in SOD1 (n=4), C9orf72 (n=12), TARDBP (n=4), & FUS/TLS (n=1) genes. Whether this case tested positive for any of these is not specified.

    2. P937Fn/an/an/an/ap.Val7Ilec.19C>A

      Case#: P937, F, Italian

      CasePresentingHPOs: HP:0007354

      CaseGenotypingMethod: Sanger sequencing

      Variant: c.19C>A p.Val7Ile

      CaseAddInfo: This allele is not found in the reference NM_006000.2 or NM_006000.3 (CAID can not be created or retrieved because there is a G in this location instead of the C reported here).

      CaseAddInfo: While most cases were found to be negative during pre-screening for known mutations, some cases were positive for mutations in SOD1 (n=4), C9orf72 (n=12), TARDBP (n=4), & FUS/TLS (n=1) genes. Whether this case tested positive for any of these is not specified.

    3. B1103M5714 yearsSpinalNoIVS2+4A>Gc.226+4A>G

      Case#: B1103, M, 57 y.o., Italian

      CasePresentingHPOs: HP:0007354, HP:0003202, HP:0007340

      CaseNotHPOs: HP:0100543

      CaseGenotypingMethod: Sanger sequencing

      Variant: NM_006000.3(TUBA4A):c.226+4A>G IVS2+4A>G

      CAID: CA2018007638

      CaseAddInfo: While most cases were found to be negative during pre-screening for known mutations, some cases were positive for mutations in SOD1 (n=4), C9orf72 (n=12), TARDBP (n=4), & FUS/TLS (n=1) genes. Whether this case tested positive for any of these is not specified.

    1. Knock-In of R33Q CASQ2 in Mouse Model

      NonHumanModel Mus Musculus

      GeneAlteration The knock-in strain was generated by homologous recombination of the targeting vector with 129Sv/J embryonic stem cells genome. A 450-bp DNA segment encompassing 5′ UTR and exon 1 of the CASQ2 was used to screen RPCI-21 PAC mouse genomic library. Positive clones were sequenced to define the structure of an 8.5-Kb region encompassing promoter, exon 1, and part of intron 1 of mouse CASQ2. This region was cloned in 3 parts and assembled into the targeting vector pFlrt (supplemental Figure I). The linearized targeting vector was electroporated into 129Sv/J embryonic stem cells. The clone selected with G418 and gancyclovir was injected into C57BL/6NCrL blastocyts and transferred to pseudopregnant CD-1 females. Genotype was determined by sequencing of DNA extracted from tail biopsy specimens (DNasy Tissue Kit, Qiagen).

      ModelPhenotype HP:0004758

      HumanPhenotype HP:0004758

      ModelEvidence Fig. 1 ECG during stimuli shows VT in only the mutant mice

      ModelVariant NM_001232.3(CASQ2):c.97C>T (p.Arg33Ter), 41043 link

    1. family B

      Family#PresentingHPOs HP:0001258, HP:0002460, HP:0007067, HP:0002395

      CountryOrigin Morocco

      Race White

      Family#Method1 WES

      Family#Method2 Sanger

      Affected 4

      Unaffected 3

      Segregations 4

      eLOD 1.93

      AddSegregationInfo consanguineous

      ProbandLabel FamilyB:IV-1 age of onset 35, Male

      Variant NM_001198868.1(CAPN1):c.1579C>T (p.Gln527Ter)

      ClinVar 225766

      FamilyAddInfo Fig 1

    1. 7/F H/S 0.3 7 years Delayed Yes/+/No +/− +/− c.1225dupG/A79V

      Case#: Wang Patient #7, female, 7yo at dx

      DiseaseAssertion: Hurler/Scheie

      FamilyInfo:

      CasePresentingHPOs:

      CaseHPOFreeText: IDUA activity=0.3 nmol/h/mg protein (normal range=27.2–52 nmol/h/mg protein.), delayed mental development, cardiac disease, Macrocephaly/joint stiffness

      CaseNotHPOs:

      CaseNotHPOFreeText: mongolian macula, hernia, airway obstruction

      PreviouslyPublished:

      Variant: p.A79V; c.1225dupG

      ClinVar: 1458769;

      CAID: CA356987

      SupplementalData:

    2. 26/F H 3 years Delayed Yes/+/Yes +/+ +/+ 668insGCG/A79V

      Case#: Wang Patient #26, female, 3yo at dx

      DiseaseAssertion: Hurler

      FamilyInfo:

      CasePresentingHPOs:

      CaseHPOFreeText: IDUA activity=not stated, delayed mental development, cardiac disease, Macrocephaly/joint stiffness/mongolian macula, Hepatosplenomegaly/ hernia, airway obstruction

      CaseNotHPOs:

      CaseNotHPOFreeText:

      PreviouslyPublished:

      Variant: p.A79V; 668insGCG

      ClinVar: 1458769;

      CAID: CA356987

      SupplementalData:

    1. echocardiographic screening of her immediate family revealed that her father and 2 of 3 siblings had cardiac hypertrophy

      FamilyLabel: Van Driest Family

      Family#PresentingHPOs: HP:0001639 (hypertrophic cardiomyopathy)

      FamilyNotHPOs:

      CountryOrigin:

      Ethnicity:

      Race:

      Family#PreviousTesting: Three highly polymorphic markers for each of 9 known HC genes (MYH7, TNNT2, TNNI, TPM1, MYL3, MYL2, MBPC, ACTC, and PRKAG2) were PCR-amplified for haplotype analysis. Only 3 candidate genes, MYL3, TNNT2, and TPM1, were shared by proband, affected siblings, and father.

      Family#Method1: (other) PCR amplification of all protein-coding exons and splice junctions of the 3 candidate genes from genomic DNA was analyzed using DHPLC (denaturing high-performance liquid chromatography).

      Family#Method2: Cycle sequencing was performed on all DHPLC amplicons with abnormal elution profiles (exon 5 of TPM1).

      Family#GenotypingMethod: DHPLC screening followed by cycle sequencing of TPM1 exon 5.

      Affected: 4

      Unaffected:

      Segregations: 3 (Figure 1)

      PublishedLOD: N/A

      eLOD: N/A; < 4 segregations

      AddSegregationInfo:

      ProbandLabel: III-1

      Variant: NM_001018005.2(TPM1):c.554T>G (p.Leu185Arg)

      ClinVar: 31881

      CAID: CA019057

      gnomAD: 15-63060930-T-G has no data in gnomAD v4.0.0

      FamilyAddInfo: TPM1 variant reported as c.T610G (p.L185R), using coding positions relative to GeneBank accession M19713.1?

      FamilyPMIDs:

    2. The proband was an 8-year-old female who died suddenly in 1997. Autopsy revealed signs of cardiac hypertrophy

      Case#: III-1

      CasePresentingHPOs: HP:0001639 (hypertrophic cardiomyopathy); HP:0001645 (sudden cardiac death)

      CaseHPOFreeText:

      CaseNotHPOs:

      CaseNotHPOFreeText:

      CasePreviousTesting: None for the proband

      CaseMethod1:

      CaseMethod2:

      CaseGenotypingMethod: DNA extracted from paraffin-embedded spleen tissue, taken at autopsy, was subjected to PCR-amplification of TPM1 exon 5 followed by cycle sequencing to confirm presence of the familial TPM1 variant.

      Variant: NM_001018005.2(TPM1):c.554T>G (p.Leu185Arg)

      ClinVar: 31881

      CAID: CA019057

      gnomAD: 15-63060930-T-G has no data in gnomAD v4.0.0

      VariantEvidence: Chang, et al. 2005 (PMID:16043485) demonstrated in ATPase activity assays that myofibrils reconstituted with L185R mutant tropomyosin had an increased sensitivity to calcium compared to wild-type tropomyosin-reconstituted myofibrils.

      CaseAddInfo: No other genes were screened for mutations in this proband.

      CasePMIDs:

    1. Patient1 (Pt1)

      Case# Pt1, female, 16yo diagnosis, French

      CasePresentingHPOs HP:0001433, HP:0001263, HP:0001252, HP:0001395, HP:0000744, HP:0000718, HP:0000713, HP:0001397, HP:0003651, HP:0012465, HP:0001999, HP:0003155, HP:0003124, HP:0010837, HP:0011967, HP:0012852 (Hepatosplenomgaly, Psychomotor delay, Hypotonia, Hepatic fibrosis, Low tolerance to frustration, Aggressiveness, Agitation, Hepatic steatosis, Foamy histiocytes, Increased liver iron, Dysmorphic facies, Elevated alkaline phosphatase, High cholesterol, Decreased ceruloplasmin, Copper deficiency, Hepatic bridging fibrosis)

      HPOsFreeText Hepatospenomegaly and cholestasis(spontaneously resolved) (neonate); Elevated liver enzymes, psychomotor delay, hypotonia(6mo); liver cytolysis, portal-to-portal bridging fibrosis without regenerative nodules, fatty hepatocytes, foamy histiocytes, and iron overload(4yo); behavioral issues, dysmorphic features, elevated relative exchangeable and urinary copper and other metabolic abnormalities(13yo);enlarged portal tracts and liver tissue abnormalities (Fig1)

      CaseNotHPOs HP:0200032 (Kayser-Fleischer ring)

      CasePreviousTesting Negative for NPC and Wilson disease(ATP7B variants) as well as TMEM199 variants. Metabolic results: ASAT 56 U/L, ALAT 45 U/L [N < 40 U/L]; ALP 196 U/L [N < 119 U/L], cholesterol 5.50 mmol/L [N < 5.20 mmol/L], ceruloplasmin 0.55 μmol/L [N = 2–4.5 μmol/L], total copper 5.44 μmol/L [N = 12.5–22.5 μmol/L], y-gutamyltransferase, bilirubin, CK, glucose, lactic acid, plasma amino acids, urinary organic acids, and lysosomal acid lipase were normal, Bis(Monoacylglycero)Phosphate was also elevated.

      CaseMethod1 Direct sequencing

      CaseMethod2 n/a

      CaseGenotypingMethod Sequenced CCDC115 and TMEM199 in patients and parents

      Variant (1) NM_032357.3(CCDC115):c.92T>C (p.Leu31Ser) (2) NM_032357.3:c.19C>T(p.Arg7Ter)

      ClinVar (1) 218967 (2) n/a

      CAID (2) CA1871401

      gnomAD (1) 0.00002384(European (Non-Finnish)), 0.00001086(Total) (2) 0.00002691(European (Non-Finnish)), 0.00001220(Total)

      VariantEvidence see note on Fig 2

      CaseAddInfo nonconsanguineous

      CasePMIDs 26833332

    2. Patient 2 (Pt2)

      Case# Pt2, male, 20yo report, French

      CasePresentingHPOs HP:0200123, HP:0003155, HP:0003236, HP:0003124, HP:0003141, HP:0010837, HP:0006580, HP:0012852, HP:0025321 (Chronic Hepatitis, Elevated alkaline phosphatase, Elevated CK, High cholesterol, Elevated LDL cholesterol, Decreased ceruloplasmin, Portal fibrosis, Hepatic bridging fibrosis, Liver copper accumulation)

      CaseNotHPOs HP:0002240, HP:0001744, HP:0001999, HP:0200032 (Hepatomegaly, Splenomegaly, Dysmorphic facies, Kayser-Fleischer ring)

      CasePreviousTesting Negative for NPC and Wilson disease(ATP7B variants) as well as TMEM199 variants. Metabolic workup: ALAT 154 U/L, ASAT 137 U/L [N < 40 U/L] for >6 months, GGT was normal, ALP 218 U/L [N < 119 U/L], CK 519 U/L [N < 190 U/L], cholesterol 8.16 mmol/L [N < 5.7 mmol/L], ceruloplasmin 0.54 μmol/L [N = 2–4.5 μmol/L], normal urinary copper, REC 19% [N = 3.0–8.1%], liver copper 2.47 μmol/g, [N = 0.3–0.9 μmol/g]

      CaseMethod1 Direct sequencing

      CaseMethod2 n/a

      CaseGenotypingMethod Sequenced CCDC115 and TMEM199 in patients and parents

      Variant (1) NM_032357.3(CCDC115):c.92T>C (p.Leu31Ser) (2) NM_032357.3:c.38T>C(p.Leu13Pro)

      ClinVar (1) 218967 (2) n/a

      CAID (2) CA348488009

      gnomAD (1) 0.00002384(European (Non-Finnish)), 0.00001086(Total) (2) n/a

      VariantEvidence see note on Fig 2

      CaseAddInfo nonconsanguineous

      CasePMIDs 26833332

    3. Patient 3

      Case# Pt3, male, 16yo diagnosis, French

      CasePresentingHPOs HP:0009062, HP:0001433, HP:0001396, HP:0003124, HP:0012852, HP:0001414, HP:0011924, HP:0001409, HP:0001394, HP:0011343, HP:0002342, HP:0003236, HP:0001315, HP:0010837, HP:0010836 (Infantile axial hypotonia, Hepatosplenomegaly, Cholestasis, High cholesterol, Hepatic bridging fibrosis, Microvesicular hepatic steatosis, Mitochondrial complex III deficiency, Portal hypertension, Cirrhosis, Moderate global developmental delay, Moderate ID, Elevated CK, Absent deep tendon reflexes Decreased ceruloplasmin, Abnormal copper homeostasis)

      HPOsFreeText Hepatosplenomegaly and choleostasis reported at birth. Enlarged portal tracts, focal portal inflammation, loss of interlobular ducts in 1/3 of portal tracts and proliferation of bile ductules, lobular steatosis

      CaseNotHPOs HP:0003200 (Ragged red fibers)

      NotHPOsFreeText foamy hepatoocytes, bile plug

      CasePreviousTesting Negative for NPC, Gaucher and Wilson disease(ATP7B variants) as well as TMEM199 variants. Excluded acid lipase deficiency. Negative for disease causing variants in any known genes involved in mitochondrial metabolism. Ruled out type IV glycogen storage disease. Metabolic results: cholesterol 9.92 mmol/L [N < 5.2 mmol/L], ceruloplasmin 0.09 g/L [N = 0.2–0.5 g/L], REC 18% [N = 3.0–8.1%], normal serum(4.16 μmol/L) and exchangeable copper(0.75 μmol/L). Glycogen and cytochrome oxidases were normal.

      CaseMethod1 Exome sequencing

      CaseMethod2 n/a

      CaseGenotypingMethod Exome sequenced patient DNA, direct sequenced CCDC115 and TMEM199 in parents

      Variant (1) NM_032357.3(CCDC115):c.92T>C (p.Leu31Ser) (2) NM_032357.3:c.19C>T(p.Arg7Ter)

      ClinVar (1) 218967 (2) n/a

      CAID (2) CA1871401

      gnomAD (1) 0.00002384(European (Non-Finnish)), 0.00001086(Total) (2) 0.00002691(European (Non-Finnish)), 0.00001220(Total)

      VariantEvidence see note on Fig 2

      CaseAddInfo nonconsanguineous

      CasePMIDs 26833332

    1. Case#: Consequence 4 Table 1 in Data Supplement (1 cases)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.2156G>A (p.Arg719Gln)

      ClinVar: 14107 https://www.ncbi.nlm.nih.gov/clinvar/variation/14107/

      CAID: n/a

      gnomAD: absent

    2. Case#: Consequence 6 Table 1 in Data Supplement (1 cases)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.2146G>A (p.Gly716Arg)

      ClinVar: 14105 https://www.ncbi.nlm.nih.gov/clinvar/variation/14105/

      CAID: n/a

      gnomAD: absent

    3. Case#: Consequence 3 Table 1 in Data Supplement (4 cases)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.2717A>G (p.Asp906Gly)

      ClinVar: 14125 https://www.ncbi.nlm.nih.gov/clinvar/variation/14125/

      CAID: n/a

      gnomAD: 0.000008792 European (non-Finnish) https://gnomad.broadinstitute.org/variant/14-23893321-T-C

    4. Case#: Consequence 12 Table 1 in Data Supplement (1 cases)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.208A>T (p.Thr70Ser)

      ClinVar: 42877 https://www.ncbi.nlm.nih.gov/clinvar/variation/42877/

      CAID: n/a

      gnomAD: 0.00001761 European (non-Finnish) https://gnomad.broadinstitute.org/variant/14-23902430-T-A

    5. Case#: Consequence 24 Table 1 in Data Supplement (1 cases)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.1357C>T (p.Arg453Cys)

      ClinVar: 14089 https://www.ncbi.nlm.nih.gov/clinvar/variation/14089/

      CAID: n/a

      gnomAD: absent

    6. Case#: Consequence 2 Table 1 in Data Supplement (1 case)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.5135G>A (p.Arg1712Gln)

      ClinVar: 36642 https://www.ncbi.nlm.nih.gov/clinvar/variation/36642/

      CAID: n/a

      gnomAD: 0.00004657 European (non-Finnish) https://gnomad.broadinstitute.org/variant/14-23884860-C-T

    7. Case#: Consequence 1 Table 1 in Data Supplement (1 case)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.1988G>A (p.Arg663His)

      ClinVar: 42875 https://www.ncbi.nlm.nih.gov/clinvar/variation/42875/

      CAID: n/a

      gnomAD: 0.00003097 European (non-Finnish) https://gnomad.broadinstitute.org/variant/14-23896042-C-T

    8. Case#: Consequence 17 Table 1 in Data Supplement (1 cases)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.2681A>G (p.Glu894Gly)

      ClinVar: 42922 https://www.ncbi.nlm.nih.gov/clinvar/variation/42922/

      CAID: n/a

      gnomAD: absent

    9. Case#: Consequence 21 Table 1 in Data Supplement (1 cases)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.2945T>C (p.Met982Thr)

      ClinVar: 42941 https://www.ncbi.nlm.nih.gov/clinvar/variation/42941/

      CAID: n/a

      gnomAD: 0.001416 European (non-Finnish) https://gnomad.broadinstitute.org/variant/14-23892910-A-G

    10. Case#: Consequence 18 Table 1 in Data Supplement (4 cases)

      DiseaseAssertion: HCM

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: Cardiac magnetic resonance imaging, BSA, NYHA functional class, obstructive HCM, atrial fibrillation, coronary artery disease, NSVT, Syncope, SCD family hitory, wall thickness

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CasePreviousTesting: Additional oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing for MYBPC3, TMP1, TNNC1, TNNI2, TNNI3, TNNT2, ACTC1, MYL3

      CaseGenotypingMethod: oligonucleotide hybridization–based DNA sequencing and dideoxy-based DNA sequencing

      Variant: NM_000257.4(MYH7):c.1750G>C (p.Gly584Arg)

      ClinVar: 14090 https://www.ncbi.nlm.nih.gov/clinvar/variation/14090/

      CAID: n/a

      gnomAD: 0.000008790 European (non-Finnish) https://gnomad.broadinstitute.org/variant/14-23896932-C-G

    1. Individual 2

      Case: Fritzen Individual 2, male, German, AOR= 3 yo

      CasePresentingHPOs: HP:0001511, HP:0001518, HP:0000252, HP:0000047, HP:0001643, HP:0001655, HP:0008947, HP:0001263, HP:0001344, HP:0001256, HP:0000486, HP:0000483, HP:000432, HP:0001357, HP:0000348, HP:0009890, HP:0000490, HP:0000455, HP:0000430, HP:0000343, HP:0010804, HP:0002714, HP:0012471, HP:0000047, HP:0001814, HP:0000752

      CasePresentingText: intrauterine growth retardation noted at 22 weeks gestation. PFO/PDA closed spontaneously. Started walking at 18 months, at 3 years old no speech. EEG was not able to be evaluated.

      CaseNOTHPOs: HP:0000365, HP:0001250

      CasePreviousTesting: Chromosome analysis, microdeletion 22q11.2 testing, chromosomal microarray analysis, fragile X testing (FMR1) and methylation sensitive MLPA for chromosome 11 and 7 loci (Silver-Russell syndrome) testing were unremarkable and normal.

      CaseGenotypingMethod: WES

      Sanger sequencing was used to confirm the mutation and to exclude the presence of the mutant in the parents.

      The WES identified a heterozygous mutation in ARID1A, a gene that is associated with Coffin-Siris syndrome. The mutation was a 6 bp duplication in (NM_006015.4:c.489_494dupCGCCGC, p.[(A164_A165dup)]. It was maternally inherited, and the mother was not noted to have behavioral abnormalities. In addition, the WES revealed 18 different mutations in 12 genes (Supplemental Table 1). Most of these were ruled out due to high frequencies in the control population in homozygoues state, or the genes were associated with disease entities that had disparate phenotypes than the those presenting in the proband.

      Variant: chr2:g.48035302_48035303del; NM_001190274.1:c.2738_2739delAT (p.Y913X)

      CA ID: CA658820925

      de novo

      gnomAD: not present

      AddCaseInfo:

      VariantEvidence: No variant evidence to confer alteration of FBXO11 function or pathogenicity. Furthermore, the presence of a VUS in ARID1A that is responsible for Coffin-Siris syndrome, which has many overlapping phenotype, cannot be ruled out as contributory, even in the absence of an strongly overt phenotype in the mother. Subtle behvioral phenotypes could be present, and she was not fully evaluated to rule out and behavioral abnormalities. Albeit, this mutation has arisen in another unrelated individual, de novo, in Martinez et al., 2017 (PMID: 27620904 ), as well as one patient, de novo in the DECIPHER DDD study (case 325596).Therefore, I am downgrading the score but minimally.

    1. 3-1

      Case# Subject 3-1, male, 11yo, Pakistani

      CasePresentingHPOs HP:0000750, HP:0011342, HP:0000286, HP:0000431, HP:0000490, HP:0000717, HP:0007302, HP:0000218, HP:0001500, HP:0001837, HP:0002650, HP:0001249, HP:0001252, HP:0000717 (Speech delay, Mild global developmental delay, Epicanthus, Broad nasal bridge, Deep set eyes, Bipolar disorder, High palate, Broad fingers, Broad toes, Scoliosis, Intellectual Disability, Hypotonia, Autism)

      HPOFreeText: mild speech/motor/cognitive delay, mild prominence of lateral ventricles, mild scoliosis, mild-moderate hypotonia

      CaseNotHPOs HP:0002376, HP:0001250 (Developmental regression, Seizures)

      NotHPOFreeText: Ventillator dependence

      CasePreviousTesting Variants previously reported with a minor allele frequency > 1% were excluded. WES for additional compound-heterozygous, X-linked, or heterozygous de novo variants was negative.

      CaseMethod1 WES

      CaseMethod2 Sanger

      CaseGenotypingMethod WES on all families, confirmed heterozygous/compound heterozygous with Sanger. Sanger on individuals with an affected family member. Parents confirmed heterozygous for childrens' variants

      Variant NM_001163435.2:c.1652T>C(p.Leu551Pro), homozygous

      ClinVar n/a

      CAID CA357822100

      gnomAD n/a

      VariantEvidence n/a

      CaseAddInfo consanguinity

      CasePMIDs n/a

    2. 1-1

      Case# Subject 1-1, male, 5yo died, Saudi

      CasePresentingHPOs HP:0001558, HP:0000750, HP:0011344, HP:0002283, HP:0006829, HP:0001250, HP:0000340, HP:0000414, HP:0010804, HP:0000582, HP:0000496, HP:0002099, HP:0000964, HP:0001249 (Decreased fetal movement, Speech delay, Severe global developmental delay, Diffuse brain atrophy, Severe hypotonia, Seizures, Sloping forehead, Bulbous nose, Tented upper lip, Upslanted palpebral fissure, Abnormality of eye movement, Asthma, Eczema, Intellectual disability)

      HPOFreeText: Oligohydramnios, Abnormal white matter signal intensity, Delayed reflexes

      CaseNotHPOs HP:0002376 (Developmental regression)

      NotHPOFreeText: Ventilator dependence

      CasePreviousTesting Variants previously reported with a minor allele frequency > 1% were excluded. WES for additional compound-heterozygous, X-linked, or heterozygous de novo variants was negative. Included in previous study based on a neurogenetic diagnosis, positive family history, consanguineous parents, and no candidate genes identified by autozygosity mapping.

      CaseMethod1 WES

      CaseMethod2 Sanger

      CaseGenotypingMethod WES on all families, confirmed heterozygous/compound heterozygous with Sanger. Sanger on individuals with an affected family member. Parents confirmed heterozygous for childrens' variants

      Variant NM_033115.4(TBCK):c.1708+1G>A, homozygous

      ClinVar 183338

      gnomAD 0.00006693(European(Non-Finnish)), 0.00003244(total)

      VariantEvidence (Fig 2A) Western blot: TBCK expression reduced in patient fibroblasts by 78%.

      CaseAddInfo Consanguinity

      CasePMIDs 25558065

    1. Cases 6a, 6b

      FamilyLabel Family 6

      Family6PresentingHPOs HP:0000202, HP:0000347, HP:0001161, HP:0000157, HP:0002101, HP:0002324, HP:0030449

      (Oral cleft, Micrognathia, Hand polydactyly, Tongue abnormality, Defective lobation of lungs, Hydranencephaly, Therapeutic abortion)

      HPOsFreeText abnormal larynx/trachea, basal occipitoschisis/keyhole, absent developed and identifiable mamillary bodies, absent anterior commissure, difficult to identify nucleus dentatus

      FamilyNotHPOs n/a

      NotHPOsFreeText true alobar or semilobar holoprosencephaly

      CountryOrigin Finland

      Ethnicity n/a

      Race n/a

      Family6PreviousTesting n/a

      ProbandLabel Case 6a, Male

      Case6aPresentingHPOs HP:0001627

      (Congenital heart defect)

      HPOsFreeText Crown-heel body length 17.5cm, body weight 149g

      Case6aNotHPOs n/a

      NotHPOsFreeText Uterus duplex

      Case6aAddInfo induced abortion at 18+2wk gestational age

      Case6b Female

      Case6bPresentingHPOs HP:0001829, HP:0010066

      (Foot polydactyly, Duplicated hallux)

      HPOsFreeText crown-heel body length 22cm, body weight 170g, uterus duplex, "absence of the dorsal arch of the first and second cervical vertebrae and the pituitary"

      Case6bNotHPOs n/a

      Case6bAddInfo induced abortion at 19+6wk gestational age

      Variant NM_145014.2(HYLS1):c.632A>G (p.Asp211Gly), homozygous

      ClinVar 1143

      gnomAD MAF= 0.009594(European(Finnish)), no homozygotes

      FamilyAddInfo n/a

      FamilyPMIDs n/a

    2. Case 9

      Case9 Male, Finland

      CasePresentingHPOs HP:0000202, HP:0000347, HP:0001829, HP:0010066, HP:0000157, HP:0002101, HP:0002324, HP:0010664, HP:0030449

      (Oral cleft, Micrognathia, Hand polydactyly, Duplicated hallux, Tongue abnormality, Defective lung lobation, Hydranencephaly, Fused thalami, Therapeutic abortion)

      HPOsFreeText Crown-heel body length 22cm, body weight 245g, brain weight 6g, abnormal larynx/trachea, occipitoschisis/keyhole, absent developed and identifiable mamillary bodies, absent anterior commissure, difficult to identify nucleus dentatus, duplicated central canal in lumbar spinal cord, posterior columns seem disorganized. The ventral horn shows normal-appearing motor neurons with an SMI-311 neurofilament immunostain.

      CaseNotHPOs HP:0001161

      (Hand polydactyly)

      NotHPOsFreeText Uterus duplex, true alobar or semilobar holoprosencephaly

      CasePreviousTesting n/a

      Variant NM_145014.2(HYLS1):c.632A>G (p.Asp211Gly), homozygous

      ClinVar 1143

      gnomAD MAF= 0.009594(European(Finnish)), no homozygotes

      CaseAddInfo induced abortion at 19+5wk gestational age

      CasePMIDs n/a

    3. Case 14

      Case14 Female, Finland

      CasePresentingHPOs HP:0000347, HP:0001829, HP:0010066, HP:0002101, HP:0000238, HP:0001341, HP:0007370, HP:0010664, HP:0002126, HP:0007260

      (Micrognathia, Foot polydactyly, Duplicated hallux, Defective lung lobulation, Hydrocephalus, Olfactory lobe agenesis, Callosal agenesis, Fused thalami, Polymicrogyria, Type II lissencephaly)

      HPOsFreeText Crown-heel body length 35.5cm, body weight 1162g, brain weight 153g, abnormal larynx/trachea, uterus duplex, hydrocephalus/open-book, occipitotemporal hypoplasia, infratentorial hypoplasia, occipitoschisis/keyhole, leptomeningeal heterotopia in the Sylvian fissures , neuroepithelial rosettes, absent developed and identifiable mamillary bodies, absent anterior commissure, difficult to identify nucleus dentatus, large hypothalamic hamartoma that covers the brainstem (Fig4:) consisting of slightly nodular areas of small, round, probably partly immature, neuronal, and possibly some oligodendroglial cells, capillaries, astroglial cells, and occasional larger pyramidal neuronal cells on hematoxylin and eosin stain.

      CaseNotHPOs HP:0000202, HP:0001627, HP:0000157, HP:0007165

      (Oral cleft, Congenital heart defect, Tongue abnormality, Periventricular neuronal heterotopia)

      NotHPOsFreeText hydranencephaly/anencephaly, true alobar or semilobar holoprosencephaly

      CasePreviousTesting n/a

      Variant NM_145014.2(HYLS1):c.632A>G (p.Asp211Gly), homozygous

      ClinVar 1143

      gnomAD MAF= 0.009594(European(Finnish)), no homozygotes

      CaseAddInfo death at 20 minutes old, 33+5wk gestational age

      CasePMIDs n/a

    4. Subjects

      Case8 Male, Finland

      CasePresentingHPOs HP:0000202, HP:0000347, HP:0001829, HP:0010066, HP:0001627, HP:0002101, HP:0000238, HP:0001341, HP:0007370, HP:0010664, HP:0002126, HP:0007260, HP:0030449

      (Oral cleft, Micrognathia, Foot polydactyly, Duplicated hallux, Congenital heart defect, Defective lung lobation, Hydrocephalus, Olfactory lobe agenesis, Callosal agenesis, Fused thalami, Polymicrogyria, Type II lissencephaly, Therapeutic abortion)

      HPOsFreeText Crown-heel body length 20cm, Body weight 323g, abnormal larynx/trachea, hydrocephalus/open-book, occipitotemporal hypoplasia, infratentorial hypoplasia, occipitoschisis/keyhole, neuroepithelial rosettes, absent developed and identifiable mamillary bodies, absent anterior commissure, difficult to identify nucleus dentatus

      CaseNotHPOs HP:0001161, HP:0000157, HP:0007165

      (Hand polydactyly, Tongue abnormality, Periventricular neuronal heterotopia)

      NotHPOsFreeText Uterus duplex, hydranencephaly/anencephaly, leptomeningeal heterotopia, true alobar or semilobar holoprosencephaly

      CasePreviousTesting n/a

      Variant NM_145014.2(HYLS1):c.632A>G (p.Asp211Gly), homozygous

      ClinVar 1143

      gnomAD MAF= 0.009594(European(Finnish)), no homozygotes

      CaseAddInfo induced abortion at 19+0wk gestational age

      CasePMIDs n/a

    5. Subjects

      Case3 Female, Finland

      CasePresentingHPOs HP:0000347, HP:0010066, HP:0001829, HP:0002101, HP:0000238, HP:0001341, HP:0007370, HP:0010664, HP:0002126, HP:0007165, HP:0030449

      (Micrognathia, Duplicated hallux, Foot polydactyly, Defective lung lobation, Hydrocephalus, Olfactory lobe agenesis, Callosal agenesis, Fused thalami, Polymicrogyria, Periventricular neuronal heterotopia, Therapeutic abortion)

      HPOsFreeText crown-heel body length 17cm, body weight 103g, abnormal larynx/trachea, occipitotemporal hypoplasia, infratentorial hypoplasia, occipitoschisis/keyhole, leptomeningeal heterotopia, hydrocephalus/open-book, neuroepithelial rosettes, absent developed and identifiable mamillary bodies, absent anterior commissure, difficult to identify nucleus dentatus

      CaseNotHPOs HP:0000202, HP:0001627, HP:0000157, HP:0007260

      (Oral cleft, Congenital heart defect, Tongue abnormality, Type II lissencephaly)

      NotHPOsFreeText Uterus duplex, true alobar or semilobar holoprosencephaly

      CasePreviousTesting n/a

      Variant NM_145014.2(HYLS1):c.632A>G (p.Asp211Gly), homozygous

      ClinVar 1143

      gnomAD MAF= 0.009594(European(Finnish)), no homozygotes

      CaseAddInfo induced abortion at 15+6wk gestational age

      CasePMIDs n/a

    6. Subjects

      Case18 Male, Finland

      CasePresentingHPOs HP:0003826, HP:0000347, HP:0001627, HP:0002101, HP:0000238, HP:0001341, HP:0007370, HP:0010664, HP:0002126, HP:0007260

      (Stillbirth, Micrognathia, Congenital heart defect, Defective lung lobation, Hydrocephalus, Olfactory lobe agenesis, Callosal agenesis, Fused thalami, Polymicrogyria, Type II lissencephaly)

      HPOsFreeText Crown-heel bodylength 45cm, body weight 2050g, brain weight 265g, abnormal larynx/trachea, occipitotemporal hypoplasia, infratentorial hypoplasia, occipitoschisis/keyhole, leptomeningeal heterotopia, absent developed and identifiable mamillary bodies, absent anterior commissure, difficult to identify nucleus dentatus

      CaseNotHPOs HP:0000202, HP:0001161, HP:0001829, HP:0007165

      (Oral cleft, Hand polydactyly, Foot polydactyly, Periventricular heterotopia)

      NotHPOsFreeText Uterus duplex, neuroepithelial rosettes, true alobar or semilobar holoprosencephaly

      CasePreviousTesting n/a

      Variant NM_145014.2(HYLS1):c.632A>G (p.Asp211Gly), homozygous

      ClinVar 1143

      gnomAD MAF= 0.009594(European(Finnish)), no homozygotes

      CaseAddInfo stillbirth, 36+6wk gestational age

      CasePMIDs n/a

    7. Subjects

      Case5 Male, Finland

      CasePresentingHPOs HP:0000347, HP:0001161, HP:0001829, HP:0000157, HP:0002101, HP:0000238, HP:0001341, HP:0007370, HP:0010664, HP:0002126, HP:0007260, HP:0030449

      (Micrognathia, Hand polydactyly, Foot polydactyly, Tongue abnormality, Defective lung lobation, Hydrocephalus, Olfactory lobe agenesis, Callosal agenesis, Fused thalami, Polymicrogyria, Type II lissencephaly, Therapeutic aboriton)

      HPOsFreeText Crown-heel body length 22cm, body weight 315g, Toe polydactly with multiple extra toes, Abnormal larynx/trachea, Hydrocephalus/open-book, Occipitotemporal hypoplasia, Infratentorial hypoplasia, occipitotemporal hypoplasia, leptomeningeal heterotopia, neuroepithelial rosettes, absent developed and identifiable mamillary bodies, absent anterior commissure, difficult to identify nucleus dentatus

      CaseNotHPOs HP:0000202, HP:0001627, HP:0002444, HP:0007165

      (Oral cleft, Congenital heart defect, Hypothalamic hamartoma, Periventricular neuronal heterotopia)

      NotHPOsFreeText Uterus duplex, hypothalamic hamartoma/bulging, true alobar or semilobar holoprosencephaly

      CasePreviousTesting n/a

      Variant NM_145014.2(HYLS1):c.632A>G (p.Asp211Gly), homozygous

      ClinVar 1143

      gnomAD MAF= 0.009594(European(Finnish)), no homozygotes

      CaseAddInfo induced abortion at 18+1wk gestational age

      CasePMIDs n/a

    8. Case 13

      Case13 Female, 6day old death, Finland

      CasePresentingHPOs HP:0000347, HP:0000157, HP:0002101, HP:0000238, HP:0001341, HP:0007370, HP:0010664, HP:0002126, HP:0007260, HP:0007165

      (Micrognathia, Tongue abnormality, Defective lung lobulation, Hydrocephalus, Olfactory lobe aplasia, Callosal aplasia, Fused thalami, Polymicrogyria, Type II lissencephaly, Periventricular neuronal heterotopia)

      HPOsFreeText Crown-heel body length 42cm, Body weight 2326g, brain weight 206g, abnormality larynx/trachea, uterus duplex, hydrocephalus/open-book, occipitotemporal hypoplasia, infratentorial hypoplasia, occipitoschisis/keyhole, leptomeningeal heterotopia, neuroepithelial rosettes, absent developed and identifiable mamillary bodies, absent anterior commissure, difficult to identify nucleus dentatus, small unilateral remnant of the olfactory tract, (Fig2:)small proximal stumps of callosal fibers with a small longitudinal Probst bundle element, lateral periventricular nodular heterotopia, smooth cortical surface without normal gyration; missing midline commissures , large leptomeningeal heterotopia between the ba and brain tissue surface immunopositive for microtubule-associated protein 2 (MAP-2), hypoplastic temporal lobe displays a miniature dentate fascia, dysplastic hippocampus, heterotopic (Fig5:) glioneuronal wart-like eruption, irregular and disrupted bundles of radial glial structures, calretinin (CR)-positive and reelin positive neurons in dysplastic cortex, (Fig6:) minute dysplastic inferior olive only in some neuronal groups, totally narrowed pyramid medially below in the right lower corner of the medulla oblongata, all layers are narrowed in the atrophic cerebellar cortex of HLS, short and small frontal bundle of Probst

      CaseNotHPOs HP:0000202, HP:0001829, HP:0001627

      (Oral cleft, Foot polydactyly, Congenital heart defect)

      NotHPOsFreeText true alobar or semilobar holoprosencephaly

      CasePreviousTesting n/a

      Variant NM_145014.2(HYLS1):c.632A>G (p.Asp211Gly), homozygous

      ClinVar 1143

      gnomAD MAF= 0.009594(European(Finnish)), no homozygotes

      CaseAddInfo 33+5wk gestational age

      CasePMIDs n/a

    1. The proband, a male child with several siblings (GC20578) born to Somali parents, initially presented several years earlier with horizontal nystagmus and intermittent convergent squint

      Case#: GC20578

      PresentingHPOs:HP:0000666, HP:0000486, HP:0000540, HP:0001103

      PresentingHPOsText: Horizontal nystagmus, strabismus, difficulties with near vision, bilateral central macular disturbance.

      CaseNotHPOs: HP:0007642, HP:0031605

      CaseNotHPOsText: No night blindness, no fundus abnormalities

      CasePreviousTesting: "Previous extensive genetic testing results were negative"

      CaseGenotypingMethod1: WES

      CaseGenotypingMethod1: Confirmed by bidirectional Sanger sequencing.

      Variant: NM_002075.3: c.124C>T (p.Arg42Ter), homozygous

      ClinVar: Not in ClinVar

      CAID: CA6417419

      gnomAD: Pop max MAF 0.00006706 (Latino). No homozygotes.

      gnomAD

    1. Patient 2

      Case2: Female, Austria, 18 yrs report

      CasePresentingHPOs: HP:0010628, HP:0002643, HP:0002015, HP:0040288, HP:0001260, HP:0003690, HP:0003798, HP:0001511, HP:0001561, HP:0005216, HP:0002540, HP:0002650 (Facial weakness, Neonatal respiratory distress, Swallowing difficulties, Nasogastric tube feeding, Dysarthric speech, Limb weakness, Nemaline bodies, Intrauterine growth restriction, Polyhydramnios, Chewing difficulties, Non-ambulatory, Scoliosis)

      HPOsFreeText: 3/3/5 Apgar score

      CaseNotHPOs: HP:0002015 (Swallowing difficulties)

      NotHPOsFreeText: N/A

      CaseAddInfo: N/A

      CasePreviousTesting: N/A

      CaseGenotypingMethod: Whole exome sequencing of the proband revealed these homozygous LMOD3 mutations.

      Variant1: NM_198271.4:c.1648C>T (p.Leu550Phe)

      ClinVar: 374498 https://www.ncbi.nlm.nih.gov/clinvar/variation/374498/

      gnomAD: Not in gnomAD

      Variant2: NM_198271.4:c.1004A>G (p.Gln335Arg)

      ClinVar: 374499 https://www.ncbi.nlm.nih.gov/clinvar/variation/374499/

      gnomAD: Not in gnomAD

    2. Patients 3

      Case3: Male, Germany, 20 yrs report

      CasePresentingHPOs: HP:0010628, HP:0002015, HP:0040288, HP:0001260, HP:0003690, HP:0003798, HP:0002650 (Facial weakness, Swallowing difficulties, Nasogastric tube feeding, Dysarthric speech, Limb weakness, Nemaline bodies, Scoliosis)

      HPOsFreeText: 7/8/9 Apgar score

      CaseNotHPOs: HP:0002015, HP:0002540, , HP:0002098 (Swallowing difficulties, Non-ambulatory, Respiratory distress)

      NotHPOsFreeText: N/A

      CaseAddInfo: N/A

      CasePreviousTesting: N/A

      CaseGenotypingMethod: Next generation sequnecing-based panel analysis detected the below variants in LMOD3.

      Variant1: NM_198271.4:c.1648C>T (p.Leu550Phe)

      ClinVar: 374498 https://www.ncbi.nlm.nih.gov/clinvar/variation/374498/

      gnomAD: Not in gnomAD

      Variant2: NM_198271.4:c.1004A>G (p.Gln335Arg)

      ClinVar: 374499 https://www.ncbi.nlm.nih.gov/clinvar/variation/374499/

      gnomAD: Not in gnomAD

    1. Figure 1

      NonPatientCell UBERON:0005424

      GOterm GO:0042802

      GeneAlteration shRNAs cloned into pCAG-mir30 vector that contained a puromycin resistance gene.

      FunctionalEvidence electron microscopy of RPE in 1-2 yo mice showed 37-48% reduced phagocytosis in mutants. (fig. 1) Assayed cryosection of mouse RPE showed mislocalization of adhesion/phagocytosis markers in RPE (fig. 4)

      FAVariants NM_004698.3(PRPF3):c.1481C>T (p.Thr494Met), 3352

    1. All nine affected individuals presented with various skeletal dysplasias. In four families (A and C–E), X-rays revealed severe platyspondyly leading to disproportionate stature (Figure 1). Lumbar gibbus and kyphoscoliosis were observed in families C and D, respectively. Three individuals (from families D and E) had cervical malformations and a hypoplastic odontoid peg with cervical instability. Short stature was also present in families A and B but appeared to be the result of limb shortening. Metaphyseal abnormalities of the long bones were found in families A and E, whereas families B–D showed epiphyseal abnormalities (Figure 1). Brachydactyly was observed in affected individuals from families A, B, and D. In addition to showing skeletal abnormalities, all affected individuals in families B and C had intellectual disability (ID). This could not be assessed for individuals A:II-1, E:II-1, and E:II-2 because of their early death at 7 weeks, 6 months, and 10 months of age, respectively. Both siblings of family B were severely disabled and unable to speak and are currently wheelchair bound. Dysmorphic facial features were non-discriminatingly mild but included coarse facial features, a prominent nose, and full cheeks in almost all affected individuals (Figure S1). A single palmar crease was also observed in six of nine affected individuals. A striking phenotype present in three of the five families was T-cell-negative SCID. Affected individuals from families A and B showed a lack of T cells, whereas B cell numbers were normal (Figure 4). Family E showed idiopathic CD4+ lymphopenia and an absolute lack of naive T cells (both CD4+CD45RA+ and CD8+CD45RA+ T cells were missing). In families B and E, a typical skin rash prompted further evaluation of the blood cells. Maternal T cells were excluded, and the oligoclonal T cell reaction found in the presence of eosinophilia was compatible with an Omenn-like presentation of SCID.1,2 Worth mentioning are also the liver cysts seen in affected individuals from families A and E. Although the phenotypes were widely variable and partly contrasting (e.g., severe versus no ID, severe versus mild platyspondyly, and epiphyseal versus metaphyseal changes), all major malformations and features occurred in three organ systems only: the immune system, the skeleton, and the neurological system. All together, we classify these five families as having phenotypic variability of an EXTL3-related neuro-immuno-skeletal dysplasia phenotype. The affected individuals from families A and E died in early infancy, whereas the others are currently between 2 and 38 years of age. Individual III-1 from family D died at 30 years of age from a unknown cause. Table 1 gives an overview of the most affected organ systems in all affected individuals. Detailed case reports and clinical data for each affected individual can be found in the Supplemental Note.

      Case 1: Family A: AII-1, female

      Born at 37 weeks, consanguineous family, APGAR = 9, tachypnea developed shortly after birth. At 20 weeks, skeletal abnormalities and kidney and liver cysts were detected. Died at 7 weeks from renal insufficiency.

      HPO Terms: HP:0002652, HP:0001999, HP:0002789, HP:0005562, HP:0001407, HP:0009826, HP:0000926, HP:0001156, HP:0000085, HP:0000083, HP:0002079, HP:0002119, HP:0030747, HP:0011839

      Previous Testing: Found autosomal recessive variant in CHST9 (MIM: 610191; c.1133A>G [p.Asn378Ser] [GenBank: NM_031422])

      Genotyping Method: WES, CNV performed on WES data, EXTL3 fibroblast localization tested and compared to non-affected controls using immunocytochemistry

      Variant: p.Arg513Cys, g.28575113, c.1537C>T

      ClinVar ID: n/a

      gnomAD: http://gnomad.broadinstitute.org/variant/8-28575113-C-T

      Inheritance: autosomal recessive

      Variant Evidence:

    1. Case 3

      Case#: 3, female, 12 days (onset), 4 y (current- this differs than what is in table 1), Chinese

      CasePresentingHPOs: HP: 0008344, HP: 0012088, HP:0011968, HP: 0002013, HP:0011344, HP: 0002543, HP: 0012751 (elevated A keto acids in urine, abnormal urinary odor, feeding difficulties, vomiting, severe global developmental delay, abnormal globus pallidus, abnormal basal ganglia)

      HPOsFreeText: Bilateral damage to capsula interna and externa, Blood ammonia: 205 uM, Hemoglobin: 118 g/L, Leucin: 891.90 uM, Valine: 502.50 uM, Isoleucine: 165.99 uM, Alloisoleucine: 90.12 uM

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: 2 different variants, unsure of cis or trans

      CasePreviousTesting: n/a

      CaseMethod1: same as group

      CaseMethod2: same as group

      CaseGenotypingMethod: same as group

      Variant: NM_000709.3(BCKDHA):c.178G>T (p.Glu60Ter), NM_000709.3(BCKDHA):c.1214_1219dupCCAACC (p.Asn406Leu407insProGln)

      ClinVar: n/a

      CAID: CA406004676 , CA658820662

      gnomAD: neither in gnomAD

    2. 8 patients

      GroupPresentingHPOs: HP:0008344 (elevated A keto acids in urine)

      HPOsFreeText:

      GroupNotHPOs:

      NotHPOsFreeText:

      NumberMales: 4

      NumberFemales: 4

      CountryOrigin: mainland China

      Ethnicity:

      Race: Chinese

      AgeRange: 2 y 3 mo- 4 y 3 mo (present age)

      TotalNumber: 8

      VariantCount: 8 (subunits of BKDC: either BCKDHA, BCKDHB, or DBT)

      NonVariant: 0

      OtherVariant: 0

      GroupPreviousTesting: n/a

      GroupMethod1: PCR

      GroupMethod2: Multiple sequence alignments

      GroupGenotypingMethod: genomic DNA extracted from peripheral blood lymphocytes of patients and parents using TIANamp Blood DNA Kit. Exons and flanking intronic regions of BCKDHA, BCKDHB, and DBT were amplified with PCR and sequenced. Results compared with reference sequences in UCSC genome (BCKDHA (NM_000709), BCKDHB (NM_183050), DLD (NM_000108), DBT (NM_001918)), and compared with integrated set of variants from 1000 Genome Project to identify mutations. PolyPhen-2 and Mutationtaster program predicted the impact of missense alterations on protein function. Multiple sequence alignments obtained using BLAST.

    3. Case 6

      Case#: 6, male, 18 m (onset), 2 y 6 m (current), Chinese

      CasePresentingHPOs: HP: 0008344, HP; 0012088, HP: 0011342, HP: 0001332, HP:0002543, HP: 0012751, HP:0012747 (elevated A keto acids in urine, abnormal urinary odor, mild global developmental delay, dystonia, abnormal globus pallidus, abnormal basal ganglia, abnormal brainstem MRI signal intensity)

      HPOsFreeText: damage to cerebellar dentate nucleus, damage to corpora quadrigemina, damage to frontal lobe, damage to insular cortex, Isoleucine: 167.13 uM, Alloisoleucine: 44.88 uM

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: unsure cis or trans

      CasePreviousTesting: same as group

      CaseMethod1: same as group

      CaseMethod2: same as group

      CaseGenotypingMethod: same as group

      Variant: NM_183050.3:c.767A>G (p.Tyr256Cys), NM_183050.3:c.768C>G (p.Tyr256Ter)

      ClinVar: neither found

      CAID: CA364659935, CA142287564

      gnomAD: 0.000008820 (European, non-Finnish), not found

    4. Case 8

      Case#: 8, male, 13 days (onset), 1 y 6 m (current), Chinese

      CasePresentingHPOs: HP: 0008344, HP:0012088, HP:0011968, HP:0001254, HP:0002415, HP: 0006989 (elevated A keto acids in urine, abnormal urinary odor, feeding difficulties, lethargy, leukodystrophy, dysplastic corpus callosum)

      FreeTextHPOs: blood ammonia: 96 uM, hemoglobin: 98 g/L, leucin: 1047.24 uM, isoleucine: 261.09 uM, alloisoleucine: 127.05 uM

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: homozygous mutation

      CasePreviousTesting: same as group

      CaseMethod1: same as group

      CaseMethod2: same as group

      CaseGenotypingMethod: same as group

      Variant: NM_001918.3:c.1A>G (p.Met1Val)

      ClinVar: not found

      CAID: CA969877

      gnomAD: not found

    5. Case 1

      Case#: 1, male, 3 days (onset), 2 y 8 mo (current), Chinese

      CasePresentingHPOs: HP:0008344 HP: 0012088, HP: 0001250, HP: 0011968, HP: 0001941, HP: 0001943, HP: 0001987, HP: 0001903, HP:0012751, HP:0002543, HP: 0001276, HP:0011343 (elevated A keto acids in urine, abnormal urinary odor, seizures, feeding difficulties, acidosis, hypoglycemia, hyperammonemia, anemia, abnormal basal ganglia MRI signal intensity, abnormal globus pallidus signals, hypertonia, moderate global developmental delay)

      HPOsFreeText: Blood ammonia: 75 uM, Valine: 532.83 uM, Isoleucine: 384.90 uM, Alloisoleucine: 213.09 uM

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: variants also found in parents

      Case (Level 2)


      CasePreviousTesting: same as group

      CaseMethod1: same as group

      CaseMethod2: same as group

      CaseGenotypingMethod: same as group


      Variant1: NM_000709.3(BCKDHA): IVS6+1delG (can't search this format of an intronic mutations, how do I change it?)

      ClinVar: not sure how to search for BCKDHA IVS6 + 1delG

      CAID:

      gnomAD:


      Variant2: NM_000709.3(BCKDHA):c.740A>G (p.His247Arg)

      ClinVar: not found

      CAID: CA406012849

      gnomAD: not in gnomAD

      There are two variants listed for every patient except, one. The text said that all the mutations found were also found in the parents so does that mean they would be in trans?

      (didn't see this template at first, so still need to apply it to the other entries)

    1. VI-4 Son

      CaseVI-4: Male, 3.5 years, Turkey

      CasePresentingHPOs: HP:0004912, HP:0002540, HP:0002970 (Hypophosphatemic rickets, Inability to walk, Genu varum)

      HPOsFreeText: -3.76 standard deviation score

      CaseNotHPOs: HP:0000083, HP:0002024, HP:0001947 (Renal failure, Malabsorption, Renal tubular acidosis)

      NotHPOsFreeText: Other tubulopathies that cause secondary hypophosphatemia, Vitamin D-dependent rickets type 1 and 2

      CaseAddInfo: Variant is asserted de novo and confirmed by parental testing, Proband is hemizygous for this mutation

      CasePreviousTesting: Calcium levels (9.8 mg/dL), Decreased serum phosphate levels (2.8 mg/dL; reference 3.8-6.5), Elevated serum ALP (925 IU/L; reference 90-325), 25OHD3 levels (35 ng/ml), 1,25(OH)2D3 levels (N/A pg/mL), PTH levels (62.2 ng/L), TPR levels (69.7), Decreased TmP/GFR levels (1.95; reference 2.9-6.1)

      CaseGenotypingMethod: Genomic DNA was isolated from peripheral blood leukocytes, amplified, and directly sequenced in all the coding exons and intron-exon boundaries of PHEX. If no mutations were found, FGF23 followed by consecutive analysis of DMP1, ENPP1, CLCN5, SLC34A3 and SLC34A1 was performed. Significance of found mutations was predicted by computational programs and sorted.

      Variant: NM_000444.5:c.1217G>T (p.Cys406Phe)

      CAID: CA412573391 https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/allele?hgvs=NM_000444.5%3Ac.1217G%3ET

      gnomAD: Not in gnomAD

    1. We prospectively recruited 40 patients with confirmed pathogenic OPA1 mutations from our neuro-ophthalmology clinic: 26 patients with isolated optic atrophy and 14 patients manifesting DOA+ features (Table 1). The clinical and molecular descriptions of these patients have been detailed previously.5,9 Best-corrected visual acuity was measured using the Snellen chart and converted to logarithm of the minimum angle of resolution (LogMAR) decimal values for the purpose of statistical analysis.20 The peripapillary RNFL profile in our DOA cohort was compared with age-matched normal controls recruited among members of staff of our eye unit (N=15), and the normative database (N=328) included in the Stratus OCT operating software (Carl Zeiss Meditec, Dublin, CA, USA;

      3 individuals with this variant, but they are previously reported. PMIDs: 20417570, 20157015

    1. Here, we report an international multicenter cohort of 16 patients (of whom 7 are newly diagnosed) with biallelic pathogenic variants in ACO2 gene.

      Sharkia Proband A-3, onset at 5 weeks old, 5yo at report, Caucasian, American, male. Patient A3 has

      Variant: c.590A>G and c.172C>T

      CaseHPO: HP:0001252, HP:0001251, HP:0001250, HP:0002120, HP:0001272, HP:0000648, HP:0000512, HP:0012736, HP:0001508, HP:0000252, HP:0030890

    1. P7

      Case# P7, 2yo report

      CasePresentingHPOs HP:0005528, HP:0001873

      CasePreviousTesting genes related to MDS/inherited bone marrow failure syndromes was performed in patients, negative for this patient

      CaseMethod1 NGS

      CaseMethod2 Sanger

      CaseGenotypingMethod NGS then variant confirmed with Sanger

      Variant NM_152703.4(SAMD9L):c.2640C>A (p.His880Gln)

      ClinVar 242372

      CaseAddInfo transient monosomy 7 with somatic mutation of new variant NM_152703.3:c.3951_3955del (p.Ser1317ArgfsTer21) - CA658820702

    2. P5

      Case# P5, 7yo report

      CasePresentingHPOs HP:0005528, HP:0001873

      CasePreviousTesting genes related to MDS/inherited bone marrow failure syndromes was performed in patients, negative for this patient

      CaseMethod1 NGS

      CaseMethod2 Sanger

      CaseGenotypingMethod NGS then variant confirmed with Sanger

      Variant NM_152703.4(SAMD9L):c.2956C>T (p.Arg986Cys)

      ClinVar 446530

      VariantEvidence (Figure 5) 293FT cells transfected with p.Arg986Cys showed more limited cell proliferation than WT SAMD9L in 28202457

      CaseAddInfo "The HLA-identical brother of P5 was thoroughly evaluated as a potential bone marrow donor. He was clinically healthy and had a normal complete blood count, but he did not qualify as a donor because of hypocellular bone marrow with mild dysplastic features. He was also a carrier of the p.R986C mutation."

    1. An additional Fbxo11 mutant allele: Mutt

      ExperimentName: Mutt mice have a FBXO11 S244L mutation

      NonHumanModel: mouse (mus musculus)

      GeneAlteration: ENU (ethylnitrosourea) was used to induce random mutatgeneiss in the mouse (PMID: 10932191). Animals were screened based on the development of otitis media. Sequencing of the mouse genome uncovered a single point mutation in the FBXO11 gene resulting in a Ser244Leu protein change. This mutation occurs in the region between the F-box and CASH domain. The Ser at amino acid position 244 is conserved across several species.

      ModelPhenotype: HP:0000708

      Also cleft palate and craniofacial abnormalities

      HumanPhenotype: HP:0000708

      ModelEvidence: The Mutt mutant mice have a point mutation in FBXO11, S244L. Heterozygous Mutt mice displayed reduced startle reflex at postnatal day 48. They also showed mild cranialfacila abnormalities including a shortened face. The Mutt homozygtote mice demonstrated perinatal lethality within the first day after birth in 17% of mice, but was much less severe than the Jeff mutant mice. the Jeff mice. Furthermore, that homozygotes mice had mild cleft palate and variable facial clefting, and the surviving homozygotes went on to develop craniofacial abnormalities including short face as well as reduced hearing.

      ModelVariant: NM_001190274.1:c.983C>T (p. Ser328Leu) equivalent to ENST00000402508.5:c.731C>T (p. Ser244Leu)

      CA ID: CA346766144

    1. Patient 1

      Case1: Male, 3 months onset, Australia

      CasePresentingHPOs: HP:0002878, HP:0002460, HP:0001270, HP:0003701, HP:0000467, HP:0001488, HP:0002938, HP:0003691, HP:0003391, HP:0003803, HP:0003755 (Respiratory failure, Distal muscle weakness, Motor delay, Proximal muscle weakness, Neck muscle weakness, Bilateral ptosis, Lumbar hyperlordosis, Scapular winging, Gowers sign, Type 1 muscle fiber predominance, Type 1 fibers relatively smaller than type 2 fibers)

      HPOsFreeText: BiPAP from 3.5 yrs, Type 2B fibers absent

      CaseNotHPOs: HP:0003798, HP:0030177, HP:0031237 (Nemaline bodies, Abnormal nerve conduction study, Internally nucleated skeletal muscle fibers)

      NotHPOsFreeText: N/A

      CaseAddInfo: Variant is de novo with parental testing confirmed

      CasePreviousTesting: Patients were diagnosed with CFTD via clinical notes and muscle biopsies at pathology centers throughout Australia and several international centers.

      CaseGenotypingMethod: Two methods were used for genotyping. In 16 patients, the 10 exons spliced onto the muscle-specific isoform of TPM3 were bidirectionally sequenced from genomic DNA. For the other 7 patients, complementary DNA was generated from patient muscle and isoform-specific primers were used to sequence the transcript. Paternity was confirmed in isolated patients using microsatellite markers.

      Variant: NM_152263.4(TPM3):c.733A>G (p.Arg245Gly)

      ClinVar: 42117 https://www.ncbi.nlm.nih.gov/clinvar/variation/42117/

      gnomAD: Not in gnomAD

    2. Patient 2

      Case2: Male, Birth onset, Australia

      CasePresentingHPOs: HP:0008947, HP:0002460, HP:0001270, HP:0003701, HP:0000467, HP:0001488, HP:0002938, HP:0010628, HP:0003391, HP:0002942, HP:0003803, HP:0003755 (Infantile muscular hypotonia, Distal muscle weakness, Motor delay, Proximal muscle weakness, Neck muscle weakness, Bilateral ptosis, Lumbar hyperlordosis, Facial palsy, Gowers sign, Thoracic kyphosis, Type 1 muscle fiber predominance, Type 1 fibers relatively smaller than type 2 fibers)

      HPOsFreeText: Type 2B fibers absent

      CaseNotHPOs: HP:0003798, HP:0030177, HP:0030877, HP:0031237 (Nemaline bodies, Abnormal nerve conduction study, Obstructive deficit on pulmonary function testing, Internally nucleated skeletal muscle fibers)

      NotHPOsFreeText: N/A

      CaseAddInfo: Variant is de novo with parental testing confirmation

      CasePreviousTesting: Patients were diagnosed with CFTD via clinical notes and muscle biopsies at pathology centers throughout Australia and several international centers.

      CaseGenotypingMethod: Two methods were used for genotyping. In 16 patients, the 10 exons spliced onto the muscle-specific isoform of TPM3 were bidirectionally sequenced from genomic DNA. For the other 7 patients, complementary DNA was generated from patient muscle and isoform-specific primers were used to sequence the transcript. Paternity was confirmed in isolated patients using microsatellite markers.

      Variant: NM_152263.4(TPM3):c.505A>G (p.Lys169Glu)

      ClinVar: 42115 https://www.ncbi.nlm.nih.gov/clinvar/variation/42115/

      gnomAD: Not in gnomAD

    3. Family 4

      Family4: Australia

      FamilyPresentingHPOs: HP:0002460, HP:0003701, HP:0000508, HP:0003803, HP:0003755 (Distal muscle weakness, Proximal muscle weakness, Ptosis, Type 1 muscle fiber predominance, Type 1 fibers relatively smaller than type 2 fibers)

      HPOsFreeText: Type 2B fibers absent

      FamilyNotHPOs: HP:0001249, HP:0030177, HP:0003798 (Intellectual disability, Abnormal nerve conduction study, Nemaline bodies)

      NotHPOsFreeText: N/A

      FamilyPreviousTesting: Patients were diagnosed with CFTD via clinical notes and muscle biopsies at pathology centers throughout Australia and several international centers.

      FamilyGenotypingMethod: Two methods were used for genotyping. In 16 patients, the 10 exons spliced onto the muscle-specific isoform of TPM3 were bidirectionally sequenced from genomic DNA. For the other 7 patients, complementary DNA was generated from patient muscle and isoform-specific primers were used to sequence the transcript. In this family, 14 further DNA samples were sequenced and a LOD score analysis was performed.

      FamilyAddInfo: Affected members of this family seem to have different symptoms based on age

      FamilyPMIDs: N/A

      Affected: 5

      Segregations: 6

      PublishedLOD: 3.01 at θ = 0

      AddSegregationInfo: Candidate Gene Sequencing

      ProbandLabel: Case 5

      Variant: NM_152263.4(TPM3):c.298C>A (p.Leu100Met)

      ClinVar: 12452 https://www.ncbi.nlm.nih.gov/clinvar/variation/12452/

      gnomAD: Not in gnomAD

    1. Figure 2

      PatientCell CL:0000057 (fibroblast)

      GeneFunction GO:0070131 (positive regulation of mitochondrial translation)

      GeneAlteration n/a

      FunctionalEvidence (Figure 2D) Labelling patient fibroblast proteins with EasyTag EXPRESS35S Protein Labeling Mix showed decreased assembly of complex I (NDUFB8) and IV (COXI) which corroborates the reduced mean enzyme activity and mitochondrial translation in Table 1.

      FAVariants NM_017819.3(TRMT10C):c.814A>G (p.Thr272Ala)

      ClinVar: 224317

      and

      NM_017819.3(TRMT10C):c.542G>T (p.Arg181Leu)

      ClinVar: 224316

    1. The impact of the substitutions in exon 3’s last nucleotide (position c.550) on splicing was previously functionally evaluated using RNA analysis and was established as pathogenic [75]. In the same splice site, we detected a novel variant, c.550 + 3A > C, in a patient P02201 and as the variant had not been previously reported, we tried to functionally evaluate it. Unfortunately, none of the patient’s family members were available for testing. The variant potentially affecting the donor splice site (5'ss) of exon 3 was analyzed in silico by MaxEnt Score [76], and the ratio between mutated and wild-type 5'ss sequence was 0.41—a number suggesting a substantial effect on splicing. According to Le Guédard-Méreuze et al. [77], substitution + 3A > C is prone to cause a splicing defect even if the donor splice site does not contain any further nucleotide changes. We performed minigene analysis (detailed procedure described in Supplement Methods) to confirm the deleterious effect on splicing and it showed aberrant splicing in nearly 100% of mutated minigene construct transcripts (Fig. 3).Fig. 3Minigene splicing analysis of a novel variant c.550 + 3A > C. The wild-type and mutant genomic fragments of SERPING1 comprising exon 3 and flanking upstream (229 bp) and downstream (255 bp) intron sequences, were cloned into pET01 vector and HepG2 cells were transfected with these minigenes. Capillary electrophoresis of RT-PCR products showed aberrant splicing in nearly 100% of mutated minigene construct transcripts. Several different aberrant transcripts were detected. The most abundant was intron 3 retention followed by exon 3 skipping. Transcripts using cryptic donor splice sites − 10 and + 27 were found in the mutant minigene analysis, whereas they were not detected in the wild type at all. a Minigene analysis results: column A shows transcript proportions resulting from control minigene construct representing c.550 + 3A; column C shows transcript proportions resulting from minigene construct representing c.550 + 3C. b Scheme of the transcripts detected in the minigene analysis. c Scheme of the pET minigene construct. Cryptic splice sites found in the analysis and their exact sequences are displayed. MaxEnt Score values (MES) are specified beneath each splice siteFull size imageVariant c.686-7C > G was detected in a mother and her daughter (P03001-P03002), both affected with HAE symptoms. This variant had been described before [7], but its impact had not been yet fully evaluated. Therefore, we extracted RNA from both patients’ blood and analyzed samples by RT-PCR and fragment analysis (Supplementary Methods), which showed complete impairment caused by the variant (Fig. 4).Fig. 4mRNA analysis of patients carrying variant c.686-7C > G. Capillary electrophoresis was performed on PCR products amplified by primers annealing to exons 4 and 7. a Healthy control shows only one wild type peak. b Both patient sample results show 2 peaks—reference transcript peak and a peak corresponding to a 6 bp longer transcript using a de novo created acceptor splice site. Aberrant and normal transcript proportion was roughly equal, which corresponds to complete impairment caused by the variant. The variant preserves a reading frame and leads to incorporation of additional two amino acids (proline-alanine) into the polypeptide chain

      550+3A>C: Minigene analysis showed aberrant splicing in nearly 100% of mutated minigene construct transcripts, confirmed exon 3 splicing disruption

      686-7C>G: RT-PCR and fragment analysis. Both patient sample results show 2 peaks (WT shows only 1)—reference transcript peak and a peak corresponding to a 6 bp longer transcript using a de novo created acceptor splice site. Aberrant and normal transcript proportion was roughly equal, which corresponds to complete impairment caused by the variant. The variant preserves a reading frame and leads to incorporation of additional two amino acids (proline-alanine) into the polypeptide chain

      Variants: c.550+3A>C; c.686-7C>G

      CAIDs: CA2573332696;

    1. As Bonneau et al. (2014) correctly point out, we did describe two siblings from a non-consanguineous Norwegian family in our original Brain paper, who developed a particularly aggressive disease course characterized by ataxia, spasticity, peripheral neuropathy and myopathy (Yu-Wai-Man et al., 2010). OPA1 sequencing identified two pathogenic variants in both the affected brother and sister: the c.768C>G (p.Ser256Arg) missense mutation in exon 5b and the c.854A>G (p.Gln285Arg) missense mutation in exon 8. Bonneau et al. (2014) rightly queried whether we had actually proven compound heterozygosity in these two affected Norwegian siblings. Although DNA was not available from their deceased parents, we did have access to DNA samples from the brother’s two unaffected daughters and both harboured only the c.768C>G (p.Ser256Arg) substitution in exon 5b. Furthermore, haplotype analysis provided additional evidence that the proband and his affected sister were indeed compound heterozygous for the c.768C>G (p.Ser256Arg) and the c.854A>G (p.Gln285Arg) OPA1 mutations (Yu-Wai-Man et al., 2010).

      This variant is mentioned as a reference to a previous publication (PMID: 20157015) which has already been included in the VCI.

    1. COH1 is differentially spliced in human brain

      TissueExpression/Uberon ID: UBERON:0002113, UBERON:0000955, UBERON:0001987, UBERON:0002108, UBERON:0002048

      ExpressionEvidence: Northern Blot analysis showed ubiquitous expression of COH1 transcripts in all tissues analyzed.

      Relative quantification and PCR-based fragment analysis revealed expression of the splicing variant (NM_152564.3 utilizing exon 28b) in most human tissues. Almost equal expression of both full-length transcript (NM_017890.3 utilizing exon 28) and splice variant was found for fetal and adult brain as well as adult retina.

      Where in paper: Results, under "COH1 is differentially spliced in human brain"

    1. Subject 3

      Case# Subject 3, F, 5mo onset, Hispanic

      CasePresentingHPOs HP:0002910, HP:0001942, HP:0003201, HP:0001664, HP:0002878, HP:0001663, HP:0001249, HP:0001250, HP:0008619, HP:0100295, HP:0001260, HP:0004756, HP:0001259, HP:0012734, HP:0002151, HP:0003236, HP:0002307, HP:0000252, HP:0004322, HP:0004325, HP:0002058, HP:0002136

      HPOcont: Elevated Transaminases, Metabolic acidosis, Rhabdomyolysis, Torsade de pointes, Respiratory Failure, Ventricular fibrillation, Intellectual Disability, Seizures, Bilateral sensorineural hearing impairment, Muscle fiber atrophy, Dysarthria, Ventricular tachycardia, Coma, Ketotic hypoglycemia, Elevated Lactate, Elevated CPK, Drooling, Microcephaly, Short Stature, Low body weight, Myopathic facies, Broad-based gait

      HPOFreeText: (5 months) coma, metabolic acidosis and rhabdomyolysis. (24 years) torsade de pointes, respiratory and multiorgan failure, ventricular fibrillation, epilepsy, bilateral sensorineural hearing loss, intellectual disability and atrophic muscle fibers. She was ambulatory, some speech, drooling, myopathic facies, and wide-based gait. "Height and weight below the 5th percentile for age (weight 42.9 kg, height 147 cm), head circumference below 5th percentile for age (51.4 cm)."

      CaseNotHPOs HP:0002540, HP:0001987

      NotHPOcont: Non-ambulatory, Hyperammonemia

      CasePreviousTesting CPK elevated to 8,000 U/I on first episode, then 22,000 U/I during most severe episode.

      CaseMethod1 WES

      CaseMethod2 Sanger

      CaseGenotypingMethod WES and cSNP results confirmed with Sanger

      Variant (1) NM_152906.6:c.460G>A (p.Gly154Arg)

      ClinVar (1) 208823

      CAID (1) CA358646

      gnomAD (1) 0.001549(Other), 0.0001208(Overall)

      VariantEvidence (Figure 3) using "EBV-transformed B-lymphoblastoid cell lines (BLCLs) from another individual, subject 4 with homozygous c.460G>A (p.Gly154Arg) mutation, and evaluated the Golgi by intracellular staining with WGA, as well as cis Golgi marker, anti-GM130 antibody." WGA stain resolved lower area of golgi bodies in p.Gly154Arg cells than WT. Measured immunoglobulin heavy chain binding protein levels in WT and and patient fibroblasts, BiP levels in patient cells lower than WT after ER induced stress by Brefeldin A.

      CaseAddInfo nonconsanguineous, parents confirmed heterozygotes

      CasePMIDs n/a

    1. Gene and mutation identification Analysis of the single nucleotide polymorphism (SNP) microarray genotypes from six patients with PHID identified a single common 1.4 Mb region of shared homozygosity within cytogenetic band 10q22.1, between SNPs rs10509321 and rs1900515 (Fig. 1A). Inspection of the Ensembl and UCSC Genome Browsers demonstrated that the region included 14 known and predicted genes: ADAMTS14, C10orf27, CDH23, EIF4EBP2, LRRC2, KIAA1274, NODAL, NPFFR1, PCBD1, PPA1, PRF1, SLC29A3, SGPL1, UNC5B. Positional candidate genes were selected for sequencing in order to identify pathogenic mutations (Fig. 1B). Five different homozygous mutations were identified in the SLC29A3 gene encoding the equilibrative nucleoside transporter 3 (Fig. 1C, Table 1). Human ENT3 has been shown recently to be the cause of H syndrome, an autosomal recessive disorder with overlapping skin features to PHID (6), indicating that these are allelic disorders. hENT3 belongs to a structurally unique protein family of nucleoside and/or nucleobase transporters (13,14). The five homozygous mutations identified segregated with the disease within each family and were not present in over 100 Lebanese and Pakistani control chromosomes. Figure 1.Open in new tabDownload slideHomozygosity mapping and mutation results in five PHID families. (A) Homozygosity mapping of chromosome 10. Red bars indicate heterozygous single nucleotide polymorphisms (SNPs); blue bars, an extended run of homozygous SNPs greater than would be predicted by chance; green bars, a run of homozygous SNPs but insufficient to meet criteria for significance. (B) Genes within the 1.4 Mb interval bounded by heterozygous SNPs rs10509321 (CII.3) and rs1900515 (DII.1). (C) SLC29A3 sequence electrophoretograms demonstrating homozygous mutations in five PHID families. (D) Protein structure prediction of hENT3 by SVMTM software. (E) Multispecies alignment of the second transmembrane and the C-terminal cytoplasmic domains of ENT3 protein (accession numbers: Homo sapiens, NP_060814.4; Canis lupus, XP_546152.2; Bos taurus, XP_580640.3; Mus musculus, NP_076085.1; monodelphus domesticus, XP_001344438.1; Gallus gallus, XP_421594.2; Gasterosteus aculeatus, ENSGACP00000006741; Takifugu rubipens, ENSTRUP00000028258; Drosophila melangaster, FBpp0077753; Caenorhabditis elegans, NP_501807.3). Table 1.Mutation summary Mutation NM_018344.4 . Protein CCDS7310.1 . Protein domain . Predicted . Mutation predictions . Grantham . SIFT . c.347T>Gp.Met116ArgTransmembrane Domain 2Missense Hydrophobic to large basic910.03c.940delTp.Tyr314ThrfsX91Transmembrane Domain 7Frameshift––c.1309G>Ap.Gly437ArgIntra-cytoplasmic DomainMissense Small hydrophobic to large basic12512.0c.1330G>Tp.Glu444XIntra-cytoplasmic DomainNonsense––c.1346C>Gp.Thr449ArgIntra-cytoplasmic DomainMissense Small polar to large basic710.03Mutation NM_018344.4 . Protein CCDS7310.1 . Protein domain . Predicted . Mutation predictions . Grantham . SIFT . c.347T>Gp.Met116ArgTransmembrane Domain 2Missense Hydrophobic to large basic910.03c.940delTp.Tyr314ThrfsX91Transmembrane Domain 7Frameshift––c.1309G>Ap.Gly437ArgIntra-cytoplasmic DomainMissense Small hydrophobic to large basic12512.0c.1330G>Tp.Glu444XIntra-cytoplasmic DomainNonsense––c.1346C>Gp.Thr449ArgIntra-cytoplasmic DomainMissense Small polar to large basic710.03 Open in new tab Table 1.Mutation summary Mutation NM_018344.4 . Protein CCDS7310.1 . Protein domain . Predicted . Mutation predictions . Grantham . SIFT . c.347T>Gp.Met116ArgTransmembrane Domain 2Missense Hydrophobic to large basic910.03c.940delTp.Tyr314ThrfsX91Transmembrane Domain 7Frameshift––c.1309G>Ap.Gly437ArgIntra-cytoplasmic DomainMissense Small hydrophobic to large basic12512.0c.1330G>Tp.Glu444XIntra-cytoplasmic DomainNonsense––c.1346C>Gp.Thr449ArgIntra-cytoplasmic DomainMissense Small polar to large basic710.03Mutation NM_018344.4 . Protein CCDS7310.1 . Protein domain . Predicted . Mutation predictions . Grantham . SIFT . c.347T>Gp.Met116ArgTransmembrane Domain 2Missense Hydrophobic to large basic910.03c.940delTp.Tyr314ThrfsX91Transmembrane Domain 7Frameshift––c.1309G>Ap.Gly437ArgIntra-cytoplasmic DomainMissense Small hydrophobic to large basic12512.0c.1330G>Tp.Glu444XIntra-cytoplasmic DomainNonsense––c.1346C>Gp.Thr449ArgIntra-cytoplasmic DomainMissense Small polar to large basic710.03 Open in new tab Two novel homozygous mutations predicted to cause premature protein truncation were identified, a 1 bp deletion c.940delT and a nonsense mutation c.1330G>T. The deletion causes a frame shift mutation p.Y314Tfs in transmembrane domain 7 and is predicted to result in the substitution of transmembrane domains 8–11 with an irrelevant protein sequence of 91 amino acids derived from an alternate reading frame. The nonsense mutation p.E444X is predicted to lead to premature protein truncation with loss of part of the final cytoplasmic domain and transmembrane domain 11 of hENT3. It would appear unlikely that the either residual protein would be capable of nucleoside transport function.Three homozygous missense mutations of SLC29A3 were identified to involve conserved amino acids (Table 1). The first missense mutation involves Methionine116 in transmembrane domain 2, which is a hydrophobic amino acid in species as distantly related as humans and nematodes, with a large basic amino acid, Arginine (p.M116R; Fig. 1C and E). The Grantham score for this substitution is 91, which is classified as a moderate change (15). Analysis using the SIFT prediction software also classifies this as a likely deleterious change (16). The introduction of a large basic amino acid into a transmembrane domain would likely result in significant disruption of the hydrophobic nature of the domain and result in retention of the transporter protein within the endoplasmic reticulum, as has been demonstrated for other membrane proteins (17).The second missense change is a recently reported Glycine to Arginine substitution at hENT3 amino acid 437 (p.G437R Fig. 1C), which is located in the putative cytoplasmic domain between transmembrane domains 10 and 11. This is the only mutation in the PHID cohort that is shared with the known mutations in H syndrome. Of particular interest is the observation that this is the sole individual in the PHID cohort who has not developed insulin-dependent DM. The p.G437R change involves the substitution of a large basic amino acid at a position where 41 members of the ENT family as distantly related as humans and Arabidopsis thaliana encode a small hydrophobic amino acid (Fig. 1E) (18). The Grantham difference for this change is 125 and is classified as a moderately radical change.The third missense change occurs at hENT3 amino acid residue 449, which is also located in the final putative intracellular domain between transmembrane domains 10 and 11, and involves the substitution of a Threonine by an Arginine (p.T449R). The amino acids encoded at this position in hENT3 orthologs are small polar/uncharged or small hydrophobic residues (Fig. 1E). Substitution by arginine is associated with a Grantham score of 71 and is predicted by SIFT as not to be tolerated.

      Case: Family D/Prendiville Patient 4, male, 12yo, American, Causasian

      CasePresentingHPOs: HP:0100651, HP:0000953, HP:0000998, HP:0005912, HP:0001993

      CasePresentingHPOsFreeText: Hyperpigmentation onset at 10yo; located on proximal anterior thighs initially, but spread to chest, lower back, abdomen, thighs, and posterior lower legs. Decreased IgM.

      CaseNOTHPOs: HP:0002716, HP:0001433, HP:0003493, HP:0001999, HP:0004322, HP:0001738

      CaseNOTHPOSFreeText: inflammatory symptoms

      CasePreviousTesting: ADAMTS14, C10orf27, CDH23, EIF4EBP2, LRRC2, KIAA1274, NODAL, NPFFR1, PCBD1, PPA1, PRF1, SLC29A3, SGPL1, UNC5B were sequenced since they were positional candidate genes

      CaseGenotypingMethod: homozygosity mapping (50K SNP array), candidate gene sequencing

      Variant: M116R homozygous

      ClinVarID: or CAID: CA114353

      gnomAD: This missense variant, p.M116R, is present in gnomAD v4.0.0 with a MAF=0.0001517 (179/1180030 alleles) in the European NF population and 0 homozygotes. Downscoring for homozygosity since parents are consanguineous.

      AddCaseInfo: consanguineous parents

      PreviouslyPublished: 17461801

      VariantEvidence: Functional studies in Xenopus oocytes expressing M116R displayed a near-total loss of transport activity compared to WT SLC29A3. Studies in NIH 3T3 fibroblasts demonstrated mistrafficking of the mutant protein to the ER or Gogli apparatus (Kang et al. 2010; PMID: 20595384).

    2. RESULTS Gene and mutation identification Analysis of the single nucleotide polymorphism (SNP) microarray genotypes from six patients with PHID identified a single common 1.4 Mb region of shared homozygosity within cytogenetic band 10q22.1, between SNPs rs10509321 and rs1900515 (Fig. 1A). Inspection of the Ensembl and UCSC Genome Browsers demonstrated that the region included 14 known and predicted genes: ADAMTS14, C10orf27, CDH23, EIF4EBP2, LRRC2, KIAA1274, NODAL, NPFFR1, PCBD1, PPA1, PRF1, SLC29A3, SGPL1, UNC5B. Positional candidate genes were selected for sequencing in order to identify pathogenic mutations (Fig. 1B). Five different homozygous mutations were identified in the SLC29A3 gene encoding the equilibrative nucleoside transporter 3 (Fig. 1C, Table 1). Human ENT3 has been shown recently to be the cause of H syndrome, an autosomal recessive disorder with overlapping skin features to PHID (6), indicating that these are allelic disorders. hENT3 belongs to a structurally unique protein family of nucleoside and/or nucleobase transporters (13,14). The five homozygous mutations identified segregated with the disease within each family and were not present in over 100 Lebanese and Pakistani control chromosomes. Figure 1.Open in new tabDownload slideHomozygosity mapping and mutation results in five PHID families. (A) Homozygosity mapping of chromosome 10. Red bars indicate heterozygous single nucleotide polymorphisms (SNPs); blue bars, an extended run of homozygous SNPs greater than would be predicted by chance; green bars, a run of homozygous SNPs but insufficient to meet criteria for significance. (B) Genes within the 1.4 Mb interval bounded by heterozygous SNPs rs10509321 (CII.3) and rs1900515 (DII.1). (C) SLC29A3 sequence electrophoretograms demonstrating homozygous mutations in five PHID families. (D) Protein structure prediction of hENT3 by SVMTM software. (E) Multispecies alignment of the second transmembrane and the C-terminal cytoplasmic domains of ENT3 protein (accession numbers: Homo sapiens, NP_060814.4; Canis lupus, XP_546152.2; Bos taurus, XP_580640.3; Mus musculus, NP_076085.1; monodelphus domesticus, XP_001344438.1; Gallus gallus, XP_421594.2; Gasterosteus aculeatus, ENSGACP00000006741; Takifugu rubipens, ENSTRUP00000028258; Drosophila melangaster, FBpp0077753; Caenorhabditis elegans, NP_501807.3). Table 1.Mutation summary Mutation NM_018344.4 . Protein CCDS7310.1 . Protein domain . Predicted . Mutation predictions . Grantham . SIFT . c.347T>Gp.Met116ArgTransmembrane Domain 2Missense Hydrophobic to large basic910.03c.940delTp.Tyr314ThrfsX91Transmembrane Domain 7Frameshift––c.1309G>Ap.Gly437ArgIntra-cytoplasmic DomainMissense Small hydrophobic to large basic12512.0c.1330G>Tp.Glu444XIntra-cytoplasmic DomainNonsense––c.1346C>Gp.Thr449ArgIntra-cytoplasmic DomainMissense Small polar to large basic710.03Mutation NM_018344.4 . Protein CCDS7310.1 . Protein domain . Predicted . Mutation predictions . Grantham . SIFT . c.347T>Gp.Met116ArgTransmembrane Domain 2Missense Hydrophobic to large basic910.03c.940delTp.Tyr314ThrfsX91Transmembrane Domain 7Frameshift––c.1309G>Ap.Gly437ArgIntra-cytoplasmic DomainMissense Small hydrophobic to large basic12512.0c.1330G>Tp.Glu444XIntra-cytoplasmic DomainNonsense––c.1346C>Gp.Thr449ArgIntra-cytoplasmic DomainMissense Small polar to large basic710.03 Open in new tab Table 1.Mutation summary Mutation NM_018344.4 . Protein CCDS7310.1 . Protein domain . Predicted . Mutation predictions . Grantham . SIFT . c.347T>Gp.Met116ArgTransmembrane Domain 2Missense Hydrophobic to large basic910.03c.940delTp.Tyr314ThrfsX91Transmembrane Domain 7Frameshift––c.1309G>Ap.Gly437ArgIntra-cytoplasmic DomainMissense Small hydrophobic to large basic12512.0c.1330G>Tp.Glu444XIntra-cytoplasmic DomainNonsense––c.1346C>Gp.Thr449ArgIntra-cytoplasmic DomainMissense Small polar to large basic710.03Mutation NM_018344.4 . Protein CCDS7310.1 . Protein domain . Predicted . Mutation predictions . Grantham . SIFT . c.347T>Gp.Met116ArgTransmembrane Domain 2Missense Hydrophobic to large basic910.03c.940delTp.Tyr314ThrfsX91Transmembrane Domain 7Frameshift––c.1309G>Ap.Gly437ArgIntra-cytoplasmic DomainMissense Small hydrophobic to large basic12512.0c.1330G>Tp.Glu444XIntra-cytoplasmic DomainNonsense––c.1346C>Gp.Thr449ArgIntra-cytoplasmic DomainMissense Small polar to large basic710.03 Open in new tab Two novel homozygous mutations predicted to cause premature protein truncation were identified, a 1 bp deletion c.940delT and a nonsense mutation c.1330G>T. The deletion causes a frame shift mutation p.Y314Tfs in transmembrane domain 7 and is predicted to result in the substitution of transmembrane domains 8–11 with an irrelevant protein sequence of 91 amino acids derived from an alternate reading frame. The nonsense mutation p.E444X is predicted to lead to premature protein truncation with loss of part of the final cytoplasmic domain and transmembrane domain 11 of hENT3. It would appear unlikely that the either residual protein would be capable of nucleoside transport function.Three homozygous missense mutations of SLC29A3 were identified to involve conserved amino acids (Table 1). The first missense mutation involves Methionine116 in transmembrane domain 2, which is a hydrophobic amino acid in species as distantly related as humans and nematodes, with a large basic amino acid, Arginine (p.M116R; Fig. 1C and E). The Grantham score for this substitution is 91, which is classified as a moderate change (15). Analysis using the SIFT prediction software also classifies this as a likely deleterious change (16). The introduction of a large basic amino acid into a transmembrane domain would likely result in significant disruption of the hydrophobic nature of the domain and result in retention of the transporter protein within the endoplasmic reticulum, as has been demonstrated for other membrane proteins (17).The second missense change is a recently reported Glycine to Arginine substitution at hENT3 amino acid 437 (p.G437R Fig. 1C), which is located in the putative cytoplasmic domain between transmembrane domains 10 and 11. This is the only mutation in the PHID cohort that is shared with the known mutations in H syndrome. Of particular interest is the observation that this is the sole individual in the PHID cohort who has not developed insulin-dependent DM. The p.G437R change involves the substitution of a large basic amino acid at a position where 41 members of the ENT family as distantly related as humans and Arabidopsis thaliana encode a small hydrophobic amino acid (Fig. 1E) (18). The Grantham difference for this change is 125 and is classified as a moderately radical change.The third missense change occurs at hENT3 amino acid residue 449, which is also located in the final putative intracellular domain between transmembrane domains 10 and 11, and involves the substitution of a Threonine by an Arginine (p.T449R). The amino acids encoded at this position in hENT3 orthologs are small polar/uncharged or small hydrophobic residues (Fig. 1E). Substitution by arginine is associated with a Grantham score of 71 and is predicted by SIFT as not to be tolerated.

      Case: Family A/Prendiville Patient 1, male, 14yo at report, East Indian

      CasePresentingHPOs: HP:0004322, HP:0000343, HP:0030084, HP:0001993, HP:5000011, HP:0003261, HP:0000953, HP:0000998, HP:0000520, HP:0001433, HP:0012094, HP:0430023, HP:0003565, HP:0001935, HP:0012343, HP:0040303, HP:0100651, HP:0004322, HP:0001999, HP:0100534, HP:0000670, HP:0000767, HP:0031664, HP:0002716, HP:0001763, HP:0001698

      CasePresentingHPOsFreeText: hyperpigmentation onset at 15yo; located on chin, axillae, back, abdomen. inner thigh, inguinal folds, genitalia. Pancreatomegaly. Orbital thickening and EOM infiltrate on MR/CT. Opacification of the maxillary sinuses. Posterior pericardial thickening. Thickened right atrial wall.

      CaseNOTHPOs: HP:0001738

      CaseNOTHPOSFreeText: inflammatory symptoms

      CasePreviousTesting: ADAMTS14, C10orf27, CDH23, EIF4EBP2, LRRC2, KIAA1274, NODAL, NPFFR1, PCBD1, PPA1, PRF1, SLC29A3, SGPL1, UNC5B were sequenced since they were positional candidate genes

      CaseGenotypingMethod: homozygosity mapping (50K SNP array), candidate gene sequencing

      Variant: E444X homozygous

      ClinVarID: or CAID: CA114350

      gnomAD: This nonsense variant p.E444X, located in exon 6/6, is present in gnomAD v4.0.0 with a MAF=0.0002525 (23/91078 alleles) in the South Asian population and 1 homozygote. Downscoring this variant since NMD is not expected to occur and there is 1 homozygote in gnomAD.

      AddCaseInfo: consanguinity not reported

      PreviouslyPublished: 17461801

      VariantEvidence: Functional studies in Xenopus oocytes expressing E444X displayed a partial reduction in nucleoside transport activity and impaired protein stability.

    1. subject 10

      Case# Subject 10, female, 14yo, non-Hispanic

      CasePresentingHPOs HP:0010535, HP:0002098, HP:0031064, HP:0000729, HP:0000750, HP:0001249, (Sleep apnea, Difficulty breathing, Impaired continence, Autism spectrum disorder, Speech delay, Intellectual disability)

      HPOFreeText: Phenotypes described postnatally.

      CaseNotHPOs HP:0001250, HP:0001252, HP:0000708, HP:0001285, HP:0007018, HP:0011968, HP:0000589, HP:0000648, HP:0000568, HP:0000659, HP:0000525, HP:0000581, HP:0000407, HP:0000453, HP:0410030, HP:0001629, HP:0001655, HP:0001643, HP:0010772, HP:0002020, HP:0002247, HP:0001734, HP:0002021, HP:0000076, HP:0000107, HP:0001159, HP:0001385, HP:0002650, HP:0002938, HP:0001511, HP:0011328, HP:0002007, HP:0000325, HP:0000534, HP:0000601, HP:0000316, HP:0000582, HP:0000494, HP:0045025, HP:0000286, HP:0000490, HP:0000598, HP:0004467, HP:0000414, HP:0000463, HP:0000319, HP:0012471, HP:0000160, HP:0000221, HP:0000164, HP:0000187, HP:0000218, HP:0000347, HP:0002557, HP:0003186, HP:0200055, HP:0004209, HP:0011297, HP:0001792, HP:0010490, HP:0000349, HP:0004532, HP:0000957 (Seizures, Hypotonia, Behavioral problems, Spastic quadriparesis, ADHD, Poor feeding, Coloboma, Optic atrophy, Microphthalmia, Peter's anomaly, Iris anomalies, Blepharophimosis, Sensorineural hearing loss, Choanal atresia, Cleft lip, Ventricular septal defect, Patent foramen ovale, Patent ductus arteriosus, Anomalous pulmonary venous return, Gastroesophageal reflux, Duodenal atresia, Annular pancreas, Pyloric stenosis, Vesicoureteral reflux, Cystic kidney, Syndactyly, Hip dysplasia, Scoliosis, Lumbar lordosis, Intrauterine growth retardation, Fontanel abnormality, Frontal bossing, Triangular face, Abnormal eyebrows, Hypotelorism, Hypertelorism, Upslanting palpebral fissures, Down-slanting palpebral fissures, Small palpebral fissures, Epicanthal folds, Deeply set eyes, Abnormal ears, Preauricular pits, Bulbous nose, Anteverted nares, Flat philtrum, Full lips, Small mouth, Furrowed tongue, Abnormal teeth, Broad alveolar ridges, High-arched palate, Micrognathia, Small nipples, Inverted nipples, Small hands, 5th finger clinodactyly, Digital Anomalies, Nail hypoplasia, Abnormal palmar creases, Widow's peak, Sacral hypertrichosis, Café Au Lait spots)

      CasePreviousTesting Screen for variants involved with Autism, de novo RERE variant was only result

      CaseMethod1 Exome sequencing

      CaseMethod2 sanger

      CaseGenotypingMethod exome sequencing confirmed with sanger in patient and parents by Krumm et al.

      Variant NM_012102.3:c.2278C>T(p.Gln760Ter), de novo

      ClinVar n/a

      CAID CA338172916

      gnomAD n/a

      VariantEvidence n/a

      CaseAddInfo both parents tested

      CasePMIDs 25961944

    1. family members

      Case#: (Biallelic affected sib) MM, female, 10 years (at age of blood draw) CaseHPOs: HP:0002024, HP:0002013, HP:0002570, HP:0002495, HP:0001284 (malabsorption, vomiting, steatorrhea, , impaired vibratory sensation, absent deep tendon reflexes)

      CaseHPOsFreeText:: Diagnosed with FHBL at age 10 years; neurological symptoms stabilized on Vitamin E treatment. CasePreviousTesting: Total cholesterol 24mg/dl, no detectable triglyceride ot LDL-cholesterol, 21 mg/dl HDL cholesterol. Variant: Compound heterozygous: Variant 1: NM_000384.2:c.537+1G>T (paternal) Variant 2: NM_000384.2:c.1315C>T (p.Arg439Ter) (maternal)

      ClinVar: N/A

      CAID: Variant 1: CA345962364 ; Variant 2: CA052017

      gnomAD: Variant 1: Not in gnomAD; Variant 2: 0.00002640 (Euro non-Finnish)

      Case#: (Heterozygous sib) GM (II-5), male, 14 years (at blood draw), sib of proband CaseHPOs: HP:0003563 CaseHPOsFreeText: Asymptomatic CasePreviousTesting: Total cholesterol 97 mg/dl, triglyceride 59 mg/dl, LDL-cholesterol 29 mg/dl (<5th percentile), HDL cholesterol 56 mg/dl. ** Variant:** Heterozygous for NM_000384.2:c.537+1G>T (paternal)

      CAID: CA345962364

      Case#: (Heterozygous sib) JM (II-6), male, 7 years (at blood draw), sib of proband CaseHPOs: HP:0003563 CaseHPOsFreeText: Asymptomatic CasePreviousTesting: Total cholesterol 113 mg/dl, triglyceride 60 mg/dl, LDL-cholesterol 16 mg/dl (<5th percentile), HDL cholesterol 87 mg/dl) ** Variant:** Heterozygous for NM_000384.2:c.1315C>T (p.Arg439Ter) (maternal)

      CAID: CA052017

    1. The subjects of this study are two sisters of Arab Muslim origin and their parents are entirely healthy first-degree cousins with no visual or neurological complaints. Patient I-1 was born prematurely at 35 weeks gestation and failure to thrive was a problem since birth. At 2 months of age, she was also noted to have truncal hypotonia that was replaced by multiple episodes of hypertonia and opisthotonic posturing. Furthermore, she had a weak cry and abnormal eye pursuits. An initial echocardiography and ophthalmological examinations performed at that time were unremarkable. Metabolic investigations revealed elevated serum alanine and lactate levels, but a normal cerebrospinal fluid (CSF) lactate concentration. Disease progression was marked by a persisting failure to thrive with severe neurodevelopmental delay, but brain MRI was normal. The patient subsequently developed a progressive, non-obstructive, generalised hypertrophic cardiomyopathy, in the absence of overt heart failure. The patient died at 10 months of age following an apnoeic episode.

      Case#: Speigel Patient I-1, onset at birth, death at 10mo

      DiseaseAssertion: Fatal infantile mitochondrial encephalomyopathy, hypertrophic cardiomyopathy and optic atrophy

      FamilyInfo: Parents are healthy first-degree cousins with no visual or neurological complaints. Both parents were heterozygous for this OPA1 variant. Their optic discs did not look pale on dilated fundus examination and optical coherence tomography (OCT) imaging did not show any subclinical thinning of the retinal nerve fibre layer. The parents have two clinically unaffected sons who were 14 and 11 years old when last reviewed in clinic. The older son is heterozygous for the c.1601T>G OPA1 variant, whereas the other son only carries the wild-type OPA1 allele.

      CasePresentingHPOs: HP:0001622, HP:0001531, HP:0008936, HP:0001276, HP:0002179, HP:0001612, HP:0000617, HP:0031964, HP:0012758, HP:0001639, HP:0002104

      CaseHPOFreeText: elevated lactate levels, but a normal cerebrospinal fluid (CSF) lactate concentration. progressive, non-obstructive, generalised hypertrophic cardiomyopathy,

      CaseNotHPOs: HP:0001635

      CaseNotHPOFreeText: abnormal brain MRI

      GenotypingMethod: genome-wide autozygosity mapping and next-generation exome sequencing

      PreviouslyPublished: n/a

      Variant: OPA1 NM_015560.2 c.1601T>G p.Leu534Arg

      ClinVar:

      CAID: CA357235

      SupplementalData: n/a

    1. Mucopolysaccharidosis type IVA. N-acetylgalactosamine-6-sulfate sulfatase exonic point mutations in classical Morquio and mild cases.

      PMID: 1522213

      Gene: GALNS

      Disease: Mucopolysaccharidosis IVA

      MonDO: MONDO:0009659

      InheritancePattern: AR

      ExperimentName: Expression of variant carrying cDNA in GALNS deficient fibroblasts

      FunctionalEvidence: cDNA encoding each of the 15 variants identified in the study were transfected into a GALNS deficient fibroblast cell line. 14 of the 15 altered cDNA's showed no increase in GALNS activity when the cells were assayed, confirming a lack of enzymatic activity.

      HGNC:

      GeneEvidence:

      SharedGeneImplication:

    1. We identified an Australian kindred with three brothers who presented in childhood with nonprogressive intellectual disability (ID), which included delayed developmental milestones, cognitive impairment, and macrocephaly

      Case#: Wilson_Australian kindred_Person II:2

      Demographics: Male, 44y at diagnosis, Australia

      CasePresentingHPOs: HP:0000750, HP:0001249, HP:0007351, HP:0002362, HP:0002067, HP:0100660, HP:0002396, HP:0000256

      Age at onset <2y, while age at tremor onset was 38y. Birth and early milestones were normal. Early learning difficulties were reported and the proband was able to read and write. Parkinsonism classification was akinetic-rigid. Proband showed L-Dopa response, hypokinetic dysarthria, and normal cerebellar function. Other normal features included normal eye examination, MRI, Fragile X testing, karyotype, Copper testing, blood count and chemistry, urine metabolic testing and hearing.

      CaseNotHPOs:

      CasePreviousTesting: Linkage analysis using homozygous recessive model identified no linkage to autosomes, but to two regions: Xp22.2 and Xq27.3–qter

      CaseMethod1: Copy number variation analysis

      CaseMethod2: PCR

      CaseGenotypingMethod: A ~45-kb deletion within the Xq haplotype was identified that encompassed the complete RAB39B gene and the last 3 coding exons of CLIC2.

      Variant: NC_000023.11:g.(155246216_?)_(?_155288781)del

      ClinVar: 157665

      CAID:

      gnomAD:

      VariantEvidence: The proband was hemizygous for the ~45-kb deletion encompassing the complete RAB39B and partial CLIC2 genes. Expression of both transcripts was absent from fibroblast cells of affected individuals. The proband is not scored any points as the variant involves deletion of part of an additional gene, CLIC2. Although the authors ruled out seizures and cardiac anomalies (phenotypes associated with CLIC2 missense variant) in patients from the family, it is not conclusive that CLIC2 deletion does not have any impact on the proband's phenotype.

      CaseAddInfo: The proband's siblings were also similarly affected. Elder brother of the proband died at 48y from positional asphyxia, and postmortem neuropathological studies on proband's brain showed pallor of the substantia nigra and locus coeruleus. H&E staining of substantia nigra revealed PD features, including loss of pigmented neurons and Lewy bodies in surviving neurons. Abundance of cortical Lewy bodies, were noted. Tau-immunoreactive NFTs were also observed in a small proportion of the surviving pigmented SN neurons

      CasePMIDs:

    2. phenotype of the Australian kindred is similar to the basal ganglia disorder (Waisman syndrome [MIM 311510]) reported for a Wisconsin kindred5 (Figure 1; Table S1). Members of the defining family included 13 affected males who presented with variable degrees of ID and early-onset parkinsonism. Multipoint linkage analysis of the Wisconsin family previously localized the disease-causing mutation to Xq27.3–qter with a maximum multipoint LOD of 6.75 at the genetic marker F8C (chrX:154,929,351–154,929,630; GRCh38/hg38).

      Wilson_Wisconsin kindred

      Family#PresentingHPOs: HP:0001263, HP:0000750, HP:0001249, HP:0002174, HP:0007351, HP:0002362, HP:0002067, HP:0002396, HP:0001260, HP:0000256, HP:0002007, HP:0000218, HP:0001355,

      Age at clinical evaluation <2y; early learning difficulty with ability to read and live independently (in some members), age at tremor onset 10-20y, age at Parkinson diagnosis 20s, absent response to L-Dopa, hypokinetic dysarthria, skin depigmented papules, normal cerebellar function and eye examination, normal karyotype, normal copper testing, normal blood count and chemistry, normal urine metabolic testing, normal hearing.

      FamilyNotHPOs:

      Fragile X syndrome,

      CountryOrigin: Germany

      Ethnicity:

      Race:

      Family#PreviousTesting: Multipoint linkage analysis was performed. X chromosome exome sequencing revealed no other variants in the linkage region. Direct sequencing of CLIC2 ruled out variants in the gene.

      Family#Method1: Sanger seq

      Family#Method2:

      Family#GenotypingMethod: RAB39B was directly sequenced

      Affected: 16

      Unaffected:

      Segregations:

      PublishedLOD: 6.75

      eLOD:

      AddSegregationInfo:

      ProbandLabel: Wilson_Wisconsin kindred proband

      Variant: NM_171998.4(RAB39B):c.503C>A (p.Thr168Lys)

      ClinVar: 156532

      CAID:

      gnomAD: NR

      FamilyAddInfo: Family is noted to be of German ancestry, and no consanguinity is noted.

      FamilyPMIDs: 1674730, 4025396

    1. The consequences of telomerase deficiency were studied in model organisms before telomerase mutations were discovered in the setting of human disease[18, 19]

      Animal Models telomerase deficiency was studied in mouse models prior to their discovery in association with human disease, with dyskeratosis congenita being the first to be associated with TBD

    1. Pt3

      CasePt3 male, 4yo death, Italian

      CasePresentingHPOs HP:0001987 (Hyperammonemia)

      HPOsFreeText Severe hyperammonemia at 48h of life

      CaseNotHPOs n/a

      CasePreviousTesting Metabolic testing: ammonia(348[normal< 75 μg/dl])

      CaseMethod1 PCR

      CaseMethod2 n/a

      CaseGenotypingMethod PCR using primers 80 nucleotides from the splice sites flanking the 38 exons of CPS1. Tested both patients and parents. (found in 12955727, Funghini et al. (2003))

      Variant 1. NM_001875.4:c.1022T>C(p.Leu341Ser), 2. NM_001875.4:c.3784C>T(p.Arg1262Ter ) compound heterozygous

      ClinVar n/a

      CAID 1. CA350430554, 2. CA350438463

      gnomAD 1. n/a, 2. 0.00004485(European (Finnish)), 0.000004062(Total)

      VariantEvidence n/a

      CaseAddInfo similarly affected brother died without diagnosis

      CasePMIDs n/a

    1. A 54-year-old female proband

      Case# Fam2Pat1, F, Turkish, 15yo onset

      CasePresentingHPOs HP:0002061, HP:0002066, HP:0002070, HP:0001260, HP:0001310, HP:0000563, HP:0006986

      CasePreviousTesting Neurologic examination revealed severe spasticity in the lower and mild spasticity in the upper extremities, hyperactive deep tendon reflexes, bilateral extensor plantar responses, and patellar clonus. The Hoffmann sign was positive. She had bilateral mild dysmetria and dysdiadochokinesia. Nerve conduction studies, EMG, sensory evoked potential tests, and MRI did not reveal any pathology

      CaseMethod1 Whole Exome

      Variant NM_001198869.1:c.1176G>A

      CAID CA6093326

      VariantEvidence premature stop codon

      gnomAD 1.554e-05(European (Non-Finnish)), 8.513e-06(Overall)-Exac

    1. family 2

      FamilyName: Family 2

      FamilyPresentingHPOs: HP:0000685

      FamilyNotHPOs:

      CountryOrigin: Pakistan

      Ethnicity: Pakistani

      Race: Asian

      FamilyPreviousTesting: n/a

      FamilyMethod1: WES

      FamilyMethod2:

      FamilyGenotypingMethod: Whole exome sequencing identified 26 regions of homozygosity for Family 1, specifically from WES of the proband IV:3 (Supplemental Table 4).

      Affected: 1

      Unaffected: 2

      Segregations: 0

      Consanguineous: yes

      PublishedLOD: n/a The minimum requirement for segregation inclusion is not met according to the ClinGen SOP version 6.

      eLOD: n/a

      AddSegregationInfo: Three other siblings were not tested for the variant, and appeared to not have the phenotype, including a set of twins (whether dizygotic or monozygotic was not noted).

      ProbandLabel: Family 2-IV:2, female

      Variant: NM_033068.2(ACP4):c.428C>T (p.Thr143Met)

      Assumed Homozygous, only the mother was tested for the ACPT mutation, not the father.

      ClinVar: 375700

      gnomAD: MAF= 0.0001592 (Other 1/6282) AFt=5.210E-4, no homozygotes.

      FamilyAddInfo: WES identified 26 regions of homozygosity for Family 1 (Supplemental Table 4).

      Variant deposited into the Leeds AI repository in LOVD, variant #0000000187.

      FamilyPMIDs:

      CasePresentingHPOs:

      CaseNOTHPOS:

      CasePreviousTesting: n/a

      CaseGenotypingMethod: WES identified 26 regions of homozygosity in which 2 genes, other than ACPT were flagged. These 2 genes/ variants are C18orf25:c.517G>C(p.G172C) (not in gnoMAD) and BTBD7:c.1083G>T(p.K361N) (in gnoMAD, 176 hets and 1 homozyoug AF= 0.007). These variants segregated with disease along with the ACPT variation.

    1. From supplemental tables S2 and S3 (authors used hg19 alignment).

      MONDO: MONDO:0005144 for FALS

      Case#3: Smith 2014 FALS R215C, F, 78 y.o. onset, Italy

      CasePresentingHPOs: HP:0002145, HP:0007354

      CaseHPOFreeText: spinal-onset ALS with upper and lower motor neuron signs

      CasePreviousTesting: All FALS were screened for known causative mutations/repeat expansions in SOD1, C9orf72, TARDBP, FUS, PFN1, UBQLN2, OPTN, VCP and ANG and removed from cohort if positive for variant.

      CaseMethod1: This case identified through case-control study

      CaseGenotypingMethod: Exome sequencing, confirmed with Sanger sequencing.

      Variant: NM_006000.3(TUBA4A):c.643C>T (p.Arg215Cys)

      ClinVar: 180185

      gnomAD: 2-220115778-G-A; total overall AF (non-neuro) = 0.000009609; TUBA4A_pArg215Cys_gnomAD

      CaseAddInfo: This variant found in 0/13023 control samples.

    2. From supplemental tables S2 and S3 (authors used hg19 alignment).

      MONDO: MONDO:0005144 for FALS

      Case#8: Smith 2014 FALS W407X, F, 66 y.o. onset, Italy

      CasePresentingHPOs: HP:0007354

      CaseHPOFreeText: spinal-onset ALS with upper and lower motor neuron signs

      CasePreviousTesting: All FALS were screened for known causative mutations/repeat expansions in SOD1, C9orf72, TARDBP, FUS, PFN1, UBQLN2, OPTN, VCP and ANG and removed from cohort if positive for variant.

      CaseMethod1: This case identified through case-control study

      CaseGenotypingMethod: Exome sequencing, confirmed with Sanger sequencing.

      Variant: NM_006000.3(TUBA4A):c.1220G>A (p.Trp407Ter)

      ClinVar: 180184

      CaseAddInfo: This variant found in 0/13023 control samples.

    1. III-6

      Case: Family I Proband III-6, female, 20yo at report

      CasePresentingHPOs: HP:0000953, HP:0000998, HP:0030053, HP:0001822, HP:0000365, HP:0001698, HP:0012385, HP:0034373, HP:0002619, HP:0000520, HP:0007380

      CasePresentingHPOsFreeText: Dilated lateral scleral vasculature

      CaseNOTHPOs: HP:0000823, HP:0001433, HP:0001256

      CaseNOTHPOSFreeText:

      CasePreviousTesting: Direct sequencing of AIFM2, ADAMTS14, EIF4EBP2, C10ORF54, PPA1, H2AFY2, LRRC20, NODAL, PRF1, TYSND1, SAR1A, PSAP, NPFFR1, and C10ORF27

      CaseGenotypingMethod: Microarray, homozygosity mapping, haplotype analysis, direct sequencing of exons of SLC29A3

      Variant: G427S homozygous

      ClinVarID: or CAID: 563/CA114349

      gnomAD: The missense variant G427S is present in gnomAD v4.0.0 with a MAF=0.00005339 (4/74926 alleles) in the African/African American population and 0 homozygotes.

      AddCaseInfo: Consanguineous parents, not genotyped. 3 additional affected family members

      PreviouslyPublished: n/a

      VariantEvidence: Functional studies in Xenopus oocytes demonstrated that G427S results in a total loss of transport activity (Kang et al. 2010; PMID: 20595384).

    2. Figure 2Haplotype Analysis Performed in Six Families with H SyndromeAffected individuals are marked by gray symbols. The disease-associated haplotypes in the linked interval on chromosome 10q21.3–q22.1 are shown by vertical bars (red and green) in families A–F. Alleles excluded by recombination events are marked in pink. The physical locations of the polymorphic microsatellites are given near the haplotype for individual AI-2.

      Case: Family E Proband EII-1, male, Arabic, Israeli, 17yo at report

      CasePresentingHPOs: HP:0000953, HP:0030053, HP:0000998, HP:0000054, HP:0000771, HP:0002619, HP:0001433, HP:0000520, HP:0012385, HP:0003565

      CasePresentingHPOsFreeText: scrotal masses, dilated scleral vessels, maturation arrest in all tubules with few spermatids in 4% to 5% of the tubules on testicular biopsy

      CaseNOTHPOs: HP:0008064, HP:0011025, HP:0000365, HP:0007380

      CaseNOTHPOSFreeText:

      CasePreviousTesting: direct sequencing of AIFM2, ADAMTS14, EIF4EBP2, C10ORF54, PPA1, H2AFY2, LRRC20, NODAL, PRF1, TYSND1, SAR1A, PSAP, NPFFR1, and C10ORF27

      CaseGenotypingMethod: microarray, haplotype analysis, direct sequencing of exons of SLC29A3, restriction digestion

      Variant: G437R homozygous

      ClinVarID: or CAID: 565/CA114352

      gnomAD: The missense variant G437R is present in gnomAD v4.0.0 with a MAF=0.00006666 (4/60002 alleles) in the Admixed American population and 0 homozygotes.

      AddCaseInfo: consanguineous, heterozygous, unaffected parents.

      PreviouslyPublished: PMID: 18410979

      VariantEvidence: Kang et al. (2010; PMID: 20595384) performed functional characterization of the G437R mutation in Xenopus oocytes and observed transport activity that was approximately half that of wildtype SLC29A3. Studies in NIH 3T3 fibroblasts demonstrated accelerated turnover of the G437R mutant compared to wildtype, suggesting decreased stability.

    1. RESULTS

      NonHumanModel: Murine

      GeneAlteration: murine Galns portions of intron 1 and exon 2 were deleted via homologous recombination of a cre-neomycin resistance-cre cassette and mated with a cre recombinase strain to remove the cassette and complete the deletion

      ModelPhenotype: No outward phenotypes but biochemically there was up to a 6 fold increase in GAG excretion in urine, chondroitin-6-sulfate specifically and not keratan sulfate, consistent with the human phenotype

      HumanPhenotype: in severe cases there are obvious skeletal deformations, increase of GAG's chondroitin-6-sulfate and keratan sulfate in urine and decreased or absent GALNS activity

      ModelEvidence: X-rays of mice and multiple life stages, GAG assays in urine, immunohistochemistry images of tissues with labeled chondoritin-6-sulfate and keratan sulfate to show distribution in multiple tissue types and

      ModelVariant: large deletion of portion of intron 1 and exon 2

      WhereInPaper:

    1. We detected a p.I42T variant (chr2:220116831A>G, c.125T>C, rs201865832), which was also present in three of 1005 Chinese controls, in a patient with sALS.

      Case#: Li 2018 sALS I42T, Chinese

      MonDO:* MONDO:0005145 for sALS

      CasePresentingHPOs: HP:0007354

      CaseGenotypingMethod: Sanger sequencing. TUBA4A sequencing was performed using Sanger. No further details provided.

      Variant: NM_006000.3(TUBA4A):c.125T>C (p.Ile42Thr)

      CAID: CA2122537

      gnomAD: 2-220116831-A-G; total overall AF (non-neuro) = 0.0001787 --> exceeds VCEP limit of 0.00005 therefore score at 0; TUBA4A_pI42T_gnomAD

    1. Download : Download high-res image (1MB)Download : Download full-size imageFig. 3. Mutated forms of fusion genes modify the shape of the mitochondrial network. Skin fibroblasts from patients with dominant mutations: MFN2:p.R94Q, OPA1:p.S545R and OPA1:p.R733X, show altered organization of the mitochondrial networks. (A) Representative images of controls and fibroblasts with OPA1:p.S545R and MFN2:p.R94Q mutations. Individual mitochondrial tubules are shown distinctively coloured. (B) Histograms indicate the number of individual mitochondrial tubules per total mitochondrial length; (C) the number of network branch points per total mitochondrial length; (D) the mitochondrial volume per cellular volume (convex hull algorithm); (E) and the bar diagram shows the distribution of mitochondrial lengths. Values of mutated skin fibroblasts are the mean ± s.d. of at least 40 measurements from two independent acquisitions. Control values are the mean ± s.d. of at least 160 measurements (X, XL or XXL cell size) from four healthy control cell lines. *P < 0.01, **P < 0.001, Mann–Whitney U-test. Scale bar: 10 μm.Dominant OPA1 mutations are associated with fragmented mitochondrial networks in fibroblasts from ADOA patients (Amati-Bonneau et al., 2005), and in HeLa cells transfected with OPA1 mutants (Olichon et al., 2007) but no reduction of mitochondrial volume has been described. In our study, the OPA1:p.S545R and OPA1:p.R733X mutations were associated with a higher ratio of individual mitochondrial tubules to total mitochondrial length (Fig. 3B). Unconnected mitochondria consisted of small tubular structures (Fig. 3E) with few dichotomous branches and a small number of connection points (Fig. 3C). Significantly, mitochondrial fragmentation in the OPA1:p.S545R cells was associated with a 20.5% reduction of mitochondrial volume compared to controls (P < 0.001; Mann–Whitney U-test) (Fig. 3D). The mitochondrial fragmentation observed in OPA1:p.R733X cells did not affect the total mitochondrial volume since the length of each individual tubule in these cells is longer than in OPA1:p.S545R cells.This fragmentation was associated with a disorganization of the mitochondrial network that did not affect cell size or shape. Interestingly, in OPA1:p.S545R cells, most mitochondrial tubular structures were found close to the MTOC (Fig. 3, Fig. 4) whereas isolated mitochondria were mainly found in the three extension arms of the triangular cell and around the nucleus. It would have been interesting to perform a statistical analysis of the variation of mitochondrial volume according to the various cell regions but the precise definition of these subregions for automatic anaylsis presented considerable difficulties. However, our visual analysis indicated that each region of the cell – central, perinuclear, and periplasmic – was equally affected by the reduction of mitochondrial volume in OPA1:p.S545R cells.Download : Download high-res image (848KB)Download : Download full-size imageFig. 4. Mitochondrial network of OPA1:p.S545R fibroblasts. (A) Mitochondrial network (in black) in control fibroblast (MitoTracker Green staining). (B) Mitochondrial network fragmentation induced by CCCP 10 μM 24 h. (C1–4) In OPA1:p.S545R fibroblasts, the major portion of the mitochondrial network was fragmented except for mitochondria emerging from the MTOC (white spots are supposed to indicate the position the MTOC). Representative images of at least 160 cells (X, XL or XXL cell size) from three control cell lines, acquired in two independent times. Scale bars: 10 μm.We noted that no tubular structures were preserved when mitochondrial fragmentation was induced by the mitochondrial uncoupler CCCP (Fig. 4B) or by siRNA OPA1 (supplementary material Fig. S4B).The expression of the GTPase-domain mutant of MFN2 (MFN2:p.K109T) in HeLa cells was shown to induce mitochondrial fragmentation (Detmer and Chan, 2007). However, standard fluorescent imaging revealed no mitochondrial network defects in heterozygous MFN2 CMT2A fibroblasts (Loiseau et al., 2007, Amiott et al., 2008). In contrast, our standardized technique of mitochondrial imaging showed that the missense mutation MFN2:p.R94Q induced mitochondrial biogenesis and the over-fusion of mitochondria. Reticulated mitochondria were distributed all over the cell (Fig. 3A) with a 24% higher number of mitochondrial network branch points compared to controls (P < 0.01; Mann–Whitney U-test) (Fig. 3C) and a 14.8% increase of mitochondrial content per cell compared to controls (P < 0.01; Mann–Whitney U-test) (Fig. 3D).In contrast to the mitochondrial fragmentation observed after neuroblastoma cell lines were transfected with GDAP1 mutants (Niemann et al., 2009), no alterations in mitochondrial network morphology were found in fibroblasts with the GDAP1:p.R120W mutation (Fig. 3).

      Cultured fibroblasts from patients show that this variant results in altered organization of the mitochondrial network including a 20.5% reduction in mitochondrial volume compared to controls, a higher ratio of individual mitochondrial tubules to total mitochondrial length, unconnected mitochondria that consisted of small tubular structures (Fig. 3E) with few dichotomous branches and a small number of connection points, and fragmentation of the mitochondrial network (Fig. 4).

    1. These patients are born to consanguineous parents of Moroccan origin, which are both heterozygous for this mutation (Fig. 1C) and are not related to patient TTD218UT. Patient TTD241HE was diagnosed at 18 months of age with brittle hair (tiger-tail banding pattern), dysmorphic features, developmental delay, moderate intellectual disability, microcephaly, difficulty swallowing and failure to thrive, cheerful character, mild Ichthyosis, growth retardation (length −4.7 SD, weight −2.6 SD), occipitofrontal circumference (OFC) (−3.1 SD), hypertonia, microcytic hypochromic anemia and recurrent infections. At 6 years of age, she still showed spasticity, ataxia and mild cognitive retardation without significant speech, but no signs of progressive deterioration. She has one affected younger sib (TTD275HE), also diagnosed with brittle hair, dysmorphic features, mild developmental delay, microcephaly, mild difficulty swallowing, no failure to thrive, cheerful character, mild ichthyosis, additional left thumb, no recurrent infections and growth retardation were noticed.

      Case: TTD241HE

      CaseDemographics: Female, diagnosis at 18 months, Moroccan origin

      CasePresentingHPOs: HP:0002299, HP:0045055, HP:0001999, HP:0001263, HP:0002342, HP:0000252, HP:0200136, HP:0001508, HP:0008064, HP:0008897, HP:0001276, HP:0004840, HP:0001257, HP:0002497,

      cheerful character, mild ichthyosis, length −4.7 SD, weight −2.6 SD, occipitofrontal circumference (OFC) −3.1 SD, recurrent infections, mild cognitive retardation without significant speech at 6 years of age.

      CaseNOTHPOs: No progressive deterioration at age 6

      CasePreviousTesting: None

      CaseGenotypingMethod: Sanger sequencing of the TFIIE subunits

      Variant: NM_002095.5(GTF2E2):c.559G>T (p.Asp187Tyr)

      ClinVar ID: 225841

      Pathogenic, non-LOF variant gnomAD: Not found in gnomAD

      AddCaseInfo: The parents of this individual were consanguineous and of Moroccan origin and were found to be heterozygous carriers of the variant. The individual's younger sister (TTD275HE) was also affected and homozygous for this variant. She also presented with brittle hair, dysmorphic features, mild developmental delay, microcephaly, mild difficulty swallowing, no failure to thrive, cheerful character, mild ichthyosis, additional left thumb, no recurrent infections and growth retardation

      VariantEvidence: This variant has been identified in two other individuals (other than this proband and her sibling) of Moroccan origin, giving rise to the question of a founder mutation. This proband is not being scored since the variant has already been awarded default points previously.

    1. 10455

      Case#: 10455, Female, Caucasian, 48 years (onset), 58 years (report)

      CaseHPOs: HP:0000643, HP:0012048, HP:0000473 (Blepharospasm, oromandibular dystonia, cervical dystonia/torticollis)

      CaseHPOFreeText: Segmental dystonia (BSP, oromandibular, lower face, cervical)

      CaseNotHPOs:

      CasePreviousTesting: Prior to WES, pathogenic variants in THAP1, GNAL, and Exon 5 of TOR1A were excluded by high resolution melt analysis.

      CaseMethod1: WES

      CaseMethod2: Confirmation by Sanger sequencing

      Variant: NM_020821.2:c.9605C>G (p.Ala3202Gly)

      ClinVar: NA

      CAID: CA7594605

      gnomAD 0.000009584 (European non-Finnish); no homozygotes

      VariantEvidence: None

    1. To confirm pathogenicity of the c.68G>T human mutation and to provide an informative model of the human disease, this mutation was introduced into the orthologous mouse gene using CRISPR/Cas9 gene-editing (protein ID: 94%, Figures S4A and S4B). PlaaG23V/G23V

      ExperimentName: Plaa G23V/G23V homozygous mice

      NonHumanModel: mus musculus

      GeneAlteration: Crispr/Cas9 gene editing was used to successfully mutate the mouse Plaa gene with a patient derived variant, G23V (mouse c. 68G>T) (Figure 3 and Figure S4). From the first round of injections, the obtained 33 mice, in which 3 had the c.68G>T variation alone/ solely. Confirmation of the change was performed by Sanger sequencing in the founder mice.

      ModelPhenotype: HP:0004325, HP:0002808, HP:0001337, HP:0012448

      HumanPhenotype: HP:0012448

      ModelEvidence: Plaa G23V homozygous mice are viable past birth, but cannot survive past 6 months without assistance of feeding, etc (Figure 3B). The mutant show microcephaly (reduced brain volume, Figure 3C). MRI performed on the G23V homozygous mice compared with control wildtype littermates show significantly reduced corpus callosum and cerebellum volumes, indicating reduced white matter (Figure 3E). The cerebellum is noted to have disrupted foliation (figure S5C). The authors note early onset neurodysfunction, including tremor and muscle weakness , showing severe hindlimb clasping, reduced grip strength and altered gait detectable from P14 (Figure 3 and Figure S5).

      They authors even went on to cross the Plaa G23V heterozygous mice with Plaa homozygous null mice to create Plaa G23V/- mice that have a more severe phenotype that the homozygous Plaa G23V homozygous, but less severe that the Plaa homozygous null (plaa-/-).

      EvidenceShown: Figure 3, Figure S3-6,

      ModelVariant: NM_001031689.2(PLAA):c.68G>T (p.Gly23Val)

      ClinVar ID: 427941

      Score:

      Reason: This mouse model represents a patient derived mutation that was knocked directly into the mouse Plaa locus, through use of Crispr/Cas9 gene editing. The mice were shown to have reduced Plaa protein expression (reduced by 70%), and the development of phenotypes consistent with phenotypes observed in individuals. I have therefore, increased the score based on the evidence provided.

      Score: 3

    1. The index individual in family 2 (F2_IV:1)

      Family#PresentingHPOs HP:0001290, HP:0001508, HP:0001263

      HPOcont: Hypotonia, Failure to thrive, Global developmental delay

      FamilyNotHPOs HP:0000486, HP:0000639, HP:0004326, HP:0000252, HP:0002353

      NotHPOcont: Strabismus, Nystagmus, Cachexia, Microcephaly, EEG abnormality

      CountryOrigin Saudi Arabia

      Family#PreviousTesting Brain MRI showed normal parenchyma asnd myelination in F2 individuals, mild diffuse brain atrophy in F1_IV:5

      Family#Method1 Sanger

      Family#GenotypingMethod Exome sequencing on "one of the three affected members" then confirmed in remaining members with Sanger

      Affected 3

      Unaffected 7

      PublishedLOD 4.7 (Combined with Family 1)

      AddSegregationInfo consanguinity

      ProbandLabel F1_IV:5

      CasePresentingHPOs HP:0001263, HP:0001508, HP:0001290

      HPOcont: Global developmental delay, Failure to thrive, Hypotonia

      CaseNotHPOs HP:0001250

      NotHPOcount: Seizures

      Variant NM_032504.1(UNC80):c.3793C>T (p.Arg1265Ter)

      ClinVar 219188

      gnomAD 0.00004175(Latino), 0.000006613(Overall)

    1. This is substantiated by the observation that, similarly to some types of SGR that affect the RNA decay machinery (for example, DIS3 or MTREX; Fig. 4c) and likely increase the level of functional hTR, an inhibitor of the hTR poly(A) polymerase PAPD5 increases the level of mature hTR and improves the potential of haematopoietic stem and progenitor cells in the context of PARN or dyskerin deficiency59,237,238,239.

      potential gene therapy targets to increase TERC (hTR)

    1. The index patient (V-1)

      CaseV-1: Male, 27 yrs onset, China, Asian

      CasePresentingHPOs: HP:0002875, HP:0001639, HP:0002027, HP:0001712, HP:0001671, HP:0032092, HP:0001645 (Exertional dyspnea, Hypertrophic cardiomyopathy, Abdominal pain, Left ventricular hypertrophy, Abnormal cardiac septum morphology, Left ventricular outflow tract obstruction, Sudden cardiac death)

      HPOsFreeText: N/A

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: Family is consanguineous, The MYPBC3 variant was the only one to segregate with the disease, with the CACNB2 variant also being present in individuals with "severe" forms of the disease. CACNB2+ MYH7- individuals showed no symptoms of cardiomyopathy, supporting a modifying effect leading to the clinical heterogeneity of this family, MYBPC3 variant leads to a premature termination and a loss of 49 amino acids which is predicted to undergo NMD but is also associated with incomplete penetrance

      CasePreviousTesting: Marked hypertrophic septum (27  mm) and a left-ventricular outflow obstruction (LVOTO) of 32  mmHg, Clinical features in Table 1, No members showed Brugada syndrome phenotypes, Proband also has polymorphisms in TGFB1 and AKAP9 but no other affected family member contains them suggesting a benign pathogenicity

      CaseGenotypingMethod: Genomic DNA was extracted from peripheral blood. PCR amplification was performed and sanger sequencing was performed for MYH7 and MYPBC3 mutations. After positive confirmation of the MYBPC3 mutation, RAAS genes were genotyped for a possible modifying effect. Negative findings led to a targeted NGS for the index patient using all known 104 causing/closely related genes of cardiomyopathy and chanelopathy. These variants were then filtered and analyzed for pathogenicity and confirmed in family members via Sanger sequencing.

      Variant: NM_201597.3:c.1598C>T (p.Ser533Leu)

      ClinVar: 190730 https://www.ncbi.nlm.nih.gov/clinvar/variation/190730/

      gnomAD: 0.01004, https://gnomad.broadinstitute.org/variant/10-18828340-C-T

      MultipleGeneVariants

      MYBPC3 Variant

      Variant: NM_000256.3(MYBPC3):c.3624del (p.Lys1209fs)

      ClinVar: 42727 https://www.ncbi.nlm.nih.gov/clinvar/variation/42727/

      gnomAD: 0.00005140, https://gnomad.broadinstitute.org/variant/11-47354119-TG-T

      DSP Variant

      Variant: NM_004415.4(DSP):c.3923G>A (p.Arg1308Gln)

      ClinVar: 178028 https://www.ncbi.nlm.nih.gov/clinvar/variation/178028/

      gnomAD: 0.01680, https://gnomad.broadinstitute.org/variant/6-7580346-G-A

    1. Glycosaminoglycans: KS and C6S

      ExperimentName: Accumulation of glycosaminoglycans

      GOterm:

      FunctionalEvidence: Patient cells assayed with artificial substrates for the N-acetylgalactosamine-6-sulfate sulfatase encoded by GALNS, depending on the severity of the coding sequence alteration, are either unable to break down the substrate or are hindered. Further, in mucopolysaccharidosis IVA patients with known variants, elevated levels of keratan sulfate and chondroitin-6-sulfate can be found in their urine where levels in unaffected individuals are much lower.

      HGNC:

      GeneEvidence:

      SharedGeneImplication:

    1. For each patient, the summary of clinical and molecular data is tabulated in Supplementary Table 3. The synonymous variants identified for each patient are given in Supplementary Table 4.

      Proband - Case 21

      Male, Dx at 22 yrs, MWT=30mm, LVM=148mg/m2, LVEF=75%

      HP:0001639, HCM

      Varient: NM_145046.4(CALR3):c.1036A>G (p.I346V)

      Not in Clinvar

      ExAC Score: Overall 1.647e-05

    1. Proband 2

      Family#PresentingHPOs HP:0001252, HP:0000486, HP:0200006, HP:0001344, HP:0001249, HP:0010813 (Hypotonia, Strabismus, Slanting of palpebral fissure, Absent speech, Intellectual disability, Double crown)

      HPOFreeText: narrowing of ventricles

      FamilyNotHPOs n/a

      NotHPOFreeText: n/a

      CountryOrigin Northern Israel

      Ethnicity Arab-Moslem

      Race n/a

      Family#PreviousTesting Excluded off-target, heterozygous, synonymous and X chromosome variants. Also excluded varaints that were called fewer than x8 with MAF > 1% in ExAC. Metabolic analyses as well as muscle biopsy had normal results.

      Family#Method1 WES

      Family#Method2 Sanger

      Family#GenotypingMethod WES confirmed with Sanger

      Affected 2

      Unaffected 2

      Segregations 2

      PublishedLOD n/a

      eLOD n/a

      AddSegregationInfo consanguineous

      ProbandLabel Proband 2, male, 11yo diagnosis

      CasePresentingHPOs HP:0000961, HP:0002098, HP:0006829, HP:0000237, HP:0000238, HP:0002079, HP:0000463, HP:0000218, HP:0000817, HP:0001250, HP:0000648, HP:0100702, HP:0000268, HP:0000338, HP:0000494, HP:0000520, HP:0002711, HP:0009092, HP:0000356, HP:0010864, HP:0002015, HP:0006532, HP:0001639, HP:0000276 (Cyanosis, Respiratory distress, Severe Hypotonia, Small anterior fontanelle, Hydrocephalus, Thin corpus callosum, Anteverted nares, High palate, Poor eye contact, Seizures, Optic nerve atrophy, Arachnoid cyst, Dolichocephaly, Hypomimic face, Downslanting palpebral fissures, Proptosis, Deep tongue groove, Gum ridge hypertrophy, Outer ear abnormality, Severe intellectual disability, Swallowing difficulties, Hypertrophic cardiomyopathy, Long face)

      HPOFreeText: Neonatal cyanosis, no cry, respiratory distress, upper body hypotonia, small anterior fontanelle, lateral ventricle dilation, hydrocephalus, severe head lag, hypertrophic cardiomyopathy, thin corpus callosum, central hypotonia, anteverted nares, high palate, strabismus, and no eye contact. Convulsions, retro-cochlear defect-no response on left (2y), no expressive speech, partial atrophy of optic nerve and arachnoid cyst(5y), dolicocephaly, double crown, long face, decreased facial movement, downslanting palpebral fissures, mildly prominent eyes, deep grooves in tongue, gum hypertrophy, large simple auricles, small palms(7y). Diagnosis of severe ID, severe hypotonia, convulsions, swallowing abnormalities, recurrent pneumonia, small heart muscle fibers and primitive sarcomere structure at 11 years old.

      CaseNotHPOs HP:0001507 (Growth abnormality)

      NotHPOFreeText: n/a

      Variant NM_001163435.2:c.1854del(p.Pro619GlnfsTer?)

      ClinVar n/a

      CAID CA658820911

      gnomAD n/a

      FamilyAddInfo variant absent in ~60,000 exomed individuals in Exac and in ~800 Moslem-Arab analyses. Affected sister who additionally presented with severe scoliosis, osteoporosis, narrow forehead, upslanted palpebral fissures, bushy eyebrows, flattened nose, porencephalic cyst, opistotonus, spenomegaly, prominent metopic suture and narrow high palate.

      FamilyPMIDs n/a

    1. Dysosteosclerosis (DSS), an extremely rare dense bone disease, features short stature and fractures and sometimes optic atrophy, cranial nerve palsy, developmental delay, and failure of tooth eruption in infancy or early childhood consistent with osteopetrosis (OPT). Bone histology during childhood shows unresorbed primary spongiosa from deficient osteoclast action. Additionally, there is remarkable progressive flattening of all vertebrae and, by adolescence, paradoxical metaphyseal osteopenia with thin cortical bone. Reports of consanguinity indicate autosomal recessive inheritance, yet more affected males than females suggest X-linked recessive inheritance. We investigated a nonconsanguineous girl with DSS. Osteosclerosis was discovered at age 7 months. Our studies, spanning ages 11 to 44 months, showed weight at approximately 50th percentile, and length diminishing from approximately 30th percentile to –2.3 SD. Head circumference was +4 SD. The patient had frontal bossing, blue sclera, normal teeth, genu valgum, and unremarkable joints. Radiographs showed orbital and facial sclerosis, basilar thickening, bone-in-bone appearance of the pelvis, sclerotic long bone ends, and fractures of ribs and extremities. Progressive metaphyseal widening occurred as vertebrae changed from ovoid to flattened and became beaked anteriorly. A hemogram was normal. Consistent with OPT, serum parathyroid hormone (PTH) concentrations reflected dietary calcium levels. Serum bone alkaline phosphatase, osteocalcin, and TRACP-5b were subnormal. The iliac crest contained excessive primary spongiosa and no osteoclasts. No mutations were identified in the splice sites or exons for the genes encoding chloride channel 7, T-cell immune regulator 1, OPT-associated transmembrane protein 1, and monocyte colony-stimulating factor (M-CSF) and its receptor C-FMS, ANKH, OPG, RANK, and RANKL. Genomic copy-number microarray was unrevealing. Hence, DSS is a distinctive OPT of unknown etiology featuring osteoclast deficiency during early childhood. How osteopenia follows is an enigma of human skeletal pathobiology. © 2010 American Society for Bone and Mineral Research.Keywords: bone remodeling, erlenmeyer flask deformity, osteoclast, osteosclerosis, RANKL, skeletal dysplasiaGo to:IntroductionDysosteosclerosis (DSS; OMIM % 224300)(1) refers to an extremely rare disorder characterized in 1968 by Spranger and colleagues(2) that presents in infancy or early childhood and features diffuse osteosclerosis with expanded ends of the tubular bones and platyspondyly. In keeping with a type of osteopetrosis (OPT),(3) bone histology during childhood shows unresorbed primary spongiosa and therefore deficient osteoclast action.(4,5) The skeleton is dense but brittle. Patients develop short stature and fractures and can suffer optic atrophy and sometimes cranial nerve palsy, developmental delay, and failure of tooth eruption,(1,6–9) in keeping with “marble bone disease.”(3) MRI has suggested delayed myelination in the brain,(10) seizures have occurred,(11) and various skin lesions have been reported.(11–14) Consanguinity(2,6,12,13,15) and a greater number of affected males (including in two generations) than females(11) suggest that DSS can be either an autosomal recessive trait(1,15) or an X-linked recessive trait,(11) but the genetic defect(s) is not known.(1)The clinical course and prognosis of DSS are not well understood. In 1978, Houston and colleagues(6) reported a 15-year-old boy whose iliac crest histology at 20 months of age revealed unresorbed primary spongiosa consistent with OPT. Subsequently, however, metaphyseal widening and sclerosis of early childhood changed to greater metaphyseal expansion (extending into the diaphysis) with remarkable osteopenia and cortical thinning by adolescence. In 2008, his follow-up at age 44 years was reported by Lemire and Wiebe,(16) who documented persistence of the widened proximal and distal ends of the long tubular bones with central diaphyses that were not expanded and showed cortical thickening.Here, we describe our clinical, biochemical, radiologic, histopathologic, and genetic investigation of a young girl with DSS and review the pertinent literature.Go to:Materials and MethodsInformed written consent for all studies was obtained as approved by the Human Research Protection Office, Washington University School of Medicine (St Louis, MO, USA).Case ReportThis 44-month-old American girl was admitted to our research center at ages 11, 23, 25, and 35 months. Additional outpatient serum and urine specimens were obtained at ages 27, 30, and 44 months.Medical historyThe patient was born vaginally at 38 weeks' gestation to a 37-year-old G3, P3, A0 woman. Birth weight was low for gestational age at 5 pounds, 14 ounces, but length 19½ inches.At 5 months of age, computed tomography (CT) for rapidly increasing head circumference (25th percentile at birth, 97th percentile at age 5 months, despite growth at 50th percentile for both length and weight) reportedly showed prominent ventricles, sulci, and subarachnoid spaces but no space-occupying lesion or hemorrhage.At 7 months of age, a radiograph (see below) for posttraumatic arm pain prompted a skeletal survey showing metaphyseal sclerosis that was attributed to “rickets.” Vitamin D was prescribed but not taken.From birth to 8 months of age, the patient had recurrent ear and skin infections and abdominal discomfort believed from colic.Between 8 and 11 months of age, several episodes of joint-centered limb pain were thought to be from dislocations. On referral to us at age 11 months, psychomotor development was on time. Tooth eruption was not delayed.At age 20 months, the patient fractured her distal left femur during a fall. Healing was delayed in a full splint.Ophthalmologic exam was normal at age 28 months. Audiometry had not been performed, but she seemed to hear well, had clear speech, and was bilingual.At age 30 months, she fractured through dense metaphyseal bone in her right radius and ulna during a fall. Reportedly, healing was slow (casted for 3 months). Parental recollection of further breaks was negative, but radiographs showed previous fractures. Morning stiffness in her lower limbs lasted 2 to 3 hours each day. She had chronic nasal “stuffiness.” Several episodes of erythematous papules involved her lower abdomen and were always on at least one area of her body but usually her belly, legs, or arms. Episodes lasted 3 to 4 days, were not associated with fever, and did not hurt or itch.At 36 months, she fell and fractured her distal right femur, where dense metaphyseal and more normal-appearing diaphyseal bone joined. Healing was delayed in a long-leg cast for 3 months.She received acetaminophen for nighttime fussiness but no multivitamins or supplements. She drank filtered municipal tap water. There were no factories near her home, but lead paint had been removed from a nearby house.At age 44 months (3⅔ years), interval history revealed a fractured left femur from a fall onto a carpeted floor with delayed healing while casted. Subsequently, however, the patient could run. There was generalized morning stiffness and painful ribs.Her healthy brothers were 6 and 8 years old. The family history was negative for skeletal disease or parental consanguinity. The father was of Turkish descent. The mother's family emigrated to Turkey from Greece 70 years previously.Physical findingsWhen examined for diagnosis at age 11 months, the patient had a high forehead, frontal bossing, blue sclerae, a flattened nasal bridge, downturned mouth (Fig. 1A), a narrow and high-arched palate, and a wide palatine ridge with nine normal-appearing teeth, indicating no delay in tooth eruption. Joint range of motion was full. A dermatosis involved her lower abdomen (Fig. 1B).Open in a separate windowFig. 1Patient. (A) At age 44 months, there is frontal bossing, a small midface, low-set ears, and blue sclerae. (B) At age 3 years, the recurring dermatosis (arrow) is present on the lower abdomen.At age 22 months, she had no palpable cranial sutures, bony tenderness, or genu valgum. Although 50th percentile for weight and length at age 5 months, between 11 and 35 months of age she maintained her weight at approximately 30th percentile of normal, but length decreased from approximately 30th percentile to below the growth curve (Z-score = –2.5). The upper/lower body segment Z-score increased to greater than 2.0. Arm span was less than 5th percentile. Head circumference Z-score decreased from +4.3 to +3.6. Genu valgum was present radiographically as early as 22 months of age.At age 44 months, weight was approximately 59th percentile, and length was –2.3 SD. Arm span versus height had progressed initially along the 50th percentile, but arm span measurements now showed that her arms were disproportionately short.(23)Biochemical testingFasting blood was used for all in-patient studies. Biochemical profiles were obtained from our Dade Behring Dimension Xpand instrument (Siemens Health Care Diagnostics, Inc., Los Angeles, CA, USA) using the reference ranges provided by the manufacturer. However, for all key findings, results were contrasted with values from fasting sera obtained in 2006 and 2007 from 34 healthy children and 24 healthy adults.(17)At age 11 months, the patient was given a diet containing approximately 400 mg of calcium per day to match her home intake estimated from a 7-day food record [Recommended Daily Allowance (RDA) for age = 270 mg]. At age 23 months, intake was approximately 950 mg. At age 35 months, we reduced her calcium intake to 775 mg daily (RDA of 500 mg recommended) to prevent suppressed serum parathyroid hormone (PTH) levels (see “Results”).To explore whether DSS is an OPT, we assayed serum levels of the brain isoenzyme of creatine kinase, BB-CK (Kit K20, Sebia, Norcorss, GA, USA),(18) tartrate-resistant acid phosphatase (TRACP-5b, Kit 8033, Quidel, Los Angeles, CA, USA),(17) and lactate dehydrogenase (LDH) and aspartate aminotransferase (AST).(17)Skeletal remodeling was assessed by quantitating serum bone-specific alkaline phosphatase (BAP) using ELISA (Quidel Corp., San Diego, CA, USA) and osteocalcin (Kit LKON1, Siemens Health Care Diagnostics, Inc.) and urine free deoxypyridinoline (DPD, Immulite 1000 Pyrilinks, D Kit, Siemens Medical Solutions Diagnostics, Ltd., Lianberis, Gwynedd, UK).Radiologic studiesAll radiologic studies, including images obtained elsewhere, were reviewed to assess the nature and evolution of the patient's skeletal disease, including fractures and their rate of healing. Dual-energy X-ray absorptiometry (DXA) of the patient and her parents involved a Hologic QDR 4500-A instrument (Hologic Corp., Waltham, MA, USA).Histopathologic studiesAt 2 years of age, two 3-day oral courses of demeclocycline separated by 10 days were ingested. Two days after the last dose, a transapophyseal iliac crest biopsy was performed using a Trap-Lok needle (Medical Device Technologies; Gainesville, FL, USA). The specimen was fixed in 70% ethanol and 30% water, embedded without decalcification in methyl methacrylate, and cut into 5-µm sections for staining via the hematoxylin and eosin (H&E), toluidine blue, and von Kossa methods. Unstained 10-µm sections were used for fluorescence microscopy.Mutation analysesThree genes (exons and mRNA splice sites) associated with OPT [chloride channel 7 (CLCN7), T-cell immune regulator 1 (TCIRG1), and OPT-associated transmembrane protein 1 (OSTM1)] had been studied at Connective Tissue Gene Tests (Allentown, PA, USA). We purified genomic DNA from blood leukocytes using the Gentra Puregene DNA extraction kit (Invitrogen, Carlsbad, CA, USA) and examined all coding exons and adjacent mRNA splice sites of TNFRSF11A encoding RANK, TNFRSF11B encoding OPG, and TNFSF11 encoding RANK ligand (RANKL) by PCR and sequencing in both directions using published methods and primers.(19–21) Because few osteoclasts were noted on our patient's iliac crest biopsy, the CSF1 and CSF1R genes encoding monocyte colony-stimulating factor (M-CSF) and its receptor C-FMS, respectively, were examined using primers and conditions that we developed (available on request). Furthermore, her bone modeling disturbances and the literature report of resolution of long bone osteosclerosis in DSS(6,16) led us to study the ANKH gene deactivated in craniometaphyseal dysplasia.(22) DNA sequences were evaluated using AlignX software (Vector NTI, Invitrogen) and by inspecting electropherograms.Genomic DNA copy-number microarray analysis of the proband and parents was performed using the Affymetrix SNP 6.0 chip at the Laboratory for Clinical Genomics, Washington University School of Medicine (St Louis, MO, USA) and the Partek Genomics Suite (Partek, St Louis, MO, USA).Literature reviewWe assessed all previous reports of DSS using original publications obtained from the Becker Library of Medicine, Washington University School of Medicine (St Louis, MO, USA), especially the radiographic reproductions.Go to:ResultsBiochemical testingSerum ionized calcium was highest, 5.3 mg/dL (normal 4.7 to 5.3 mg/dL), during the first admission at age 11 months (Table 1), when her estimated dietary intake of calcium significantly exceeded the RDA. With less dietary calcium, serum generally contained lower total and ionized calcium concentrations, but PTH levels fluctuated considerably over ages 11 to 44 months, ranging from 7 to 120 pg/mL (normal 4 to 52 pg/mL; Table 1). Calcium in timed urine collections ranged from 196 to 241 mg/g of creatinine (Cr).Table 1Longitudinal Biochemical FindingsSerumTotal CaCa2+PTHPiALPBAPOsteocalcinTRACP-5bAge (mos.)(normal 8.9–10.2 mg/dL)(normal 4.7–5.3 mg/dL)(normal 4–52 pg/mL)(normal 3.4–5.9 mg/dL)(normal 157–477 IU/L)(normal 88–247 U/L)(normal 37–119 ng/mL)(normal 13–23 U/L)1110.15.3344.7213—982310.25.2335.0162—2—259.14.91204.52108512227*10.1—75.2125———30*10.0—384.6140———359.95.0624.21364112344*9.85.0224.41766363Open in a separate window— = not done.*= non-fasting outpatient serum.Serum 25-hydroxyvitamin D [25(OH)D] was 28 ng/mL (normal 32 to 100 ng/mL) (Lab Corp., Burlington, NC, USA), with normal levels of magnesium and inorganic phosphate.Serum alkaline phosphatase (ALP) decreased to as low as 125 IU/L (normal 157 to 477 IU/L) and was intermittently subnormal for age, especially in view of recurrent fractures. Serum BAP, osteocalcin, and TRACP-5b levels all were consistently low (Table 1). Urine free DPD was 18 nmol/mmol of Cr (23 months) and 14 nmol/mmol of Cr (44 months) (normal 7 to 34 nmol/mmol).Serum BB-CK, LDH, and AST levels were unremarkable, unlike in some OPTs, where elevated values can occur.(17,18) Urine did not contain heavy metals. Serum was negative for lead (Legacy Laboratory Services, Portland, OR, USA).At ages 23, 35, and 44 months, complete blood counts were normal, including monocytes. Erythrocyte sedimentation rate seemed elevated for a child at 18, 15, and 24 mm/h, respectively (normal 0 to 20 mm/h for young adults), and serum C-reactive protein was consistently normal. Serum contained elevated IgG of 1416 mg/dL (normal 453 to 916 mg/dL) and slightly high IgA of 111 mg/dL (normal 20 to 100 mg/dL) (Lab Corp.).Radiologic findingsRadiographic skeletal surveys were available from ages 7, 11, 22, and 33 months. Right hand and wrist films were available at 30 months, left knee at 42 months, and right knee at 47 months.A generalized skeletal disorder was revealed, where every imaged bone was abnormal (Figs. 2 through ​through5).5). Prominent findings included basilar sclerosis of the skull and modeling abnormalities (expansion) in the major long bones resembling OPT but also ovoid vertebral bodies characteristic of DSS. The sclerosis must have occurred postnatally because relatively normal iliac bones had formed in utero that subsequently became sclerotic peripherally. The changes per anatomic site are described below.Open in a separate windowFig. 2Skull. (A) At age 22 months, anteroposterior view of the skull shows sclerosis that affects the periorbital region and skull base. The sinuses are opacified. (B) At age 33 months, the neurocranium appears large on lateral view, with diffuse sclerosis greatest at the base. The midface is small, and the mandibular angle is obtuse.Open in a separate windowFig. 5Hand and foot radiographs. At 22 (A) and 33 (B) months of age the left hand and at 22 (C) months of age the left foot show diffuse sclerosis greatest in the metaphyses of the metacarpals and metatarsals and distal radius and ulna. The amount of sclerosis in the proximal phalanges varies from much to little and is greatest in the metaphyseal regions. The tarsals have some sclerosis greatest in the cuboids. Pathologic fractures are shown through sclerotic bone in the distal radius (arrow) and ulna in the anteroposterior projection (D) at 30 months and near nonsclerotic bone in the right femur (arrows) at 47 months (E).Axial skeletonSkull The neurocranium at ages 22 and 33 months was large, resulting in craniofacial disproportion (Fig. 2). The frontal bone bulged anteriorly; the midface was small. The posterior fossa appeared prominent. Sutures were normal. Closure of the anterior fontanelle seemed delayed (open at 22 months; virtually closed at 33 months). The ascending ramus of the mandible was smaller than expected, and the mandibular angle was obtuse. Some teeth were malformed or abnormally oriented. The skull base was sclerotic, increasing between 7 to 33 months. Periorbital sclerosis was especially prominent along with sclerosis of the greater and lesser wings of the sphenoid and the posterior portion of the sphenoid body. Maxillary and ethmoid sinuses were opaque at ages 22 and 33 months, and the mastoid air cells were small.Head CT At age 5 months, CT showed a sclerotic skull base but no hydrocephalus or intracranial calcifications. The sulci were slightly enlarged. There was a suggestion of abnormal myelination. The optic foramina, middle ears, and internal auditory canals appeared grossly normal, but detailed optic foramina and petrous bone imaging was not obtained. Multiple follow-up CTs elsewhere were essentially unchanged.Chest Chest shape was normal, but the ribs were broad and diffusely sclerotic with multiple lower rib fracture deformities at age 7 months. By age 22 months, the ribs were more sclerotic, the medullary cavities were delayed (because they were just beginning to form), and there were multiple healed fractures that had become more numerous in the fifth through the eleventh ribs bilaterally. The ribs were shortened with a modeling error anteriorly, and wide anteriorly and laterally (Fig. 3A). Fractures had occurred anteriorly, and laterally and were not remodeling. At 33 months, the ribs were still sclerotic and widened, and they had more recent fractures and multiple fracture deformities but were showing further medullary cavity development. The clavicles were sclerotic, and their medial ends widened at ages 22 and 33 months. The sternal segments were broad and sclerotic, with a central lucency, as were the scapulae. The heart and lungs appeared normal.Open in a separate windowFig. 3Spine. This anteroposterior projection (A) at 22 months shows sclerotic vertebrae, dense ribs with healing fractures, sclerotic medial clavicles, and bone-in-bone appearance in the ilium as seen in some forms of OPT. Between 7 (B) and 33 (C) months of age, the lateral spine shows sclerosis and flattening of vertebral bodies that increased with age. The vertebral bodies have a pointed configuration anteriorly (greatest at 7 months). Sclerosis affects the entire vertebra.Pelvis Sclerosis was accompanied by a normal-appearing central portion of the iliac bones causing a “bone in bone” appearance at age 22 months (Fig. 3A), and even more apparent at 33 months. The upper iliac borders were irregular. The ischial and pubic bones were sclerotic. The femoral heads and metaphyses were sclerotic, and the necks were wide with failure of modeling.Spine The vertebral bodies were sclerotic, with the cranial and caudal ends appearing “sandwich-like,” and their anterior margins were pointed anteriorly. Compared with age 7 months, when the lumbar vertebrae had a more oval shape (Fig. 3B), vertebral body flattening was more striking at age 22 months, and at 33 months the vertebral bodies showed rectangular shapes with greater relative flattening (Fig. 3C). There was some anterior vertebral notching. The disk spaces were relatively widened. The neural arches also were sclerotic. A pars defect, in keeping with an OPT,(24) was observed at L4, but healed by 33 months.Appendicular skeletonExtremities The overall pattern was one of sclerosis focused primarily on the metaphyses that also were expanded (Fig. 4).Open in a separate windowFig. 4Appendicular skeleton. At 22 (A) and 33 (B) months of age the lower extremities, and at 7 (C) and 33 (D) months of age the left upper extremity, show sclerosis greatest at the proximal and distal ends of the bones and metaphyseal expansion from tubulation failure greatest in the distal femurs. (E) There are transverse metaphyseal bands of osteosclerosis, as seen in some forms of OPT (arrows). A healing fracture featuring focal bone expansion and periosteal new bone formation is present in the distal left femur at the junction of the sclerotic and nonsclerotic bone (arrows) (A). There is a slight irregularity of the physeal plates and adjacent provisional zones of calcification (C, D, E). Sclerosis in the upper extremities has increased at the ends of the bones between 7 (C) and 33 (D) months of age. In the leg bones and distal right femur, the junction between the sclerotic and nonsclerotic bone is sharp, but not well defined in the proximal femurs or distal left femur. The junction between the sclerotic and nonsclerotic bone can have a transverse or oblique shape.Tubulation failure was best seen in the distal femurs (Fig. 4A, B). By 33 months, this expansion extended almost to the midshafts. The expansion, which was greatest in the metaphyses, extended into the diaphyses and from sclerotic bone into nonsclerotic bone. Between the ages of 7 and 43 months, the dense sclerosis at the ends of the bones increased appreciably in length. Some areas of metaphyseal sclerosis were sharply demarcated at the diaphysis, whereas others appeared to fade into more normal-appearing bone. There was a healing fracture in the distal left femur at the junction of the sclerotic and nonsclerotic bone, shown by periosteal new bone formation and focal expansion of the bone (Fig. 4A). The rate at which extremity fractures healed was delayed. Fractures continued to occur. Transverse lucent areas that were small and faint were seen in the dense sclerosis of some metaphyses, such as the distal femur (Fig. 4E).In the proximal end of the humeral metaphyses and both distal radii and ulnas, between 7 and 33 months of age, there were well-demarcated areas of dense sclerosis that increased in length (Fig. 4C, D). The junctions between the sclerotic and nonsclerotic bone were varied, being transverse, oblique, and rounded. The cortices in the midshafts were thickened. The proximal humeri and the distal radii and ulnas showed best the irregularity of the provisional zones of calcification at the physeal plates (Fig. 4C, D). The epiphyses were sclerotic.Hands and feet Sclerosis was greatest in the metacarpals, metatarsals, and distal radii and ulnas and often most in their metaphyses (Fig. 5). Nevertheless, metacarpals and metatarsals contained nonsclerotic areas. Some phalanges were almost entirely sclerotic, whereas others appeared normal. In some, metaphyseal sclerosis terminated abruptly into more normal-appearing bone, and then into a mixed sclerosis pattern. The cuboids had focal sclerosis, as did some other tarsal bones, but the carpals and distal radial epiphyses had no sclerosis. The distal radii and ulnas showed irregular physeal plates, provisional zones of calcification, and broad undertubulated, densely sclerotic metaphyses where the sclerosis terminated abruptly into more normal-appearing bone (Fig. 5D). In addition, the sclerosis ended in a rounded or oblique shape. The second metacarpals had accessory epiphyses. The bone age at 22 months was delayed to 18 months. At 33 months, the metaphyses of the phalanges were more sclerotic, as were the epiphyses.At age 3 years, DXA L1–L4 spine BMD Z-score was +8.1.Fractures Fractures would occur through radiographically dense bone (Fig. 5D) or at the junction of osteosclerosis and less remarkable bone (Fig. 5E) and were slow to heal.Histopathologic findingsTransapophyseal iliac crest biopsy showed a disordered growth plate consistent with the findings in some appendicular radiographs (see above). Specifically, the physis had zones of chondrocytes with normal proliferative and hypertrophic morphologies (Fig. 6A), but the cells were not arranged in their usual columnar orientation. An area deep to the growth plate, which at the patient's age is normally composed of trabecular bone with modest amounts of centrally located cartilage remnants, consisted almost entirely of calcified cartilage, as shown by H&E, toluidine blue, and von Kossa stains (Fig. 6,B–D). There was replacement of trabecular bone by calcified cartilage and diminished numbers of hematopoietic cells. Fluorescence imaging of unstained sections (not shown) demonstrated diffuse uptake of demeclocycline in areas of calcified cartilage near the growth plate, but there were no linear single or double labels to indicate normal bone formation. The area between the calcified cartilage contained primarily mesenchymal cells (ie, osteoblasts and fibroblasts), with only rare hematopoietic cells. Osteoclasts were not identified morphologically or by TRAP staining (Fig. 6E). Overall, the findings of increased amounts of cartilage, decreased hematopoietic marrow, and an absence of identifiable osteoclasts were consistent with a form of “osteoclast-poor” OPT.Open in a separate windowFig. 6Osteoclast-poor osteopetrosis. Sections of the nondecalcified transapophyseal iliac crest biopsy at age 25 months show a growth plate (A) containing proliferative (Pr) and hypertrophic (Hy) chondrocytes that lack the normal columnar orientation along the axis perpendicular to the bone surface. In this toluidine-stained section, the bone surface is toward the left, and the chondrocytes should be arranged in rows from left to right. Scale bar = 200 µm. H&E-stained (B) and toluidine blue–stained (C) sections demonstrate disorganized trabeculae composed primarily of cartilage (purple in both stains), with only minimal bone matrix (pink in B, pale gray in C). A von Kossa stain (D) shows that the cartilage in these “trabecular” areas is calcified. TRAP staining (E) fails to identify any osteoclasts. Scale bar (B–E) = 100 µm.Family studiesSkeletal survey of the parents revealed no significant abnormalities. The mother, 5 feet, 1 inch tall, had brachycephaly and minimal degenerative changes of L5. The father, a 5 foot, 11 inch postman, had brachycephaly, spondylolysis of L5, anterior wedging of T12, and multiple Schmorl's nodes in his lumbar and thoracic spine. The patient's two brothers and three paternal cousins had several radiographs taken elsewhere following trauma that were essentially unremarkable.DXA of the mother showed BMD Z-scores at the upper half of the age-matched normal range for the L1–L4 spine, total hip, wrist, and whole body. The father's values were average for gender and age.Studies of mineral homeostasis were unremarkable for the mother and father. Respectively, serum TRACP-5b was 3 and 2 U/L (normal 2 to 4 U/L for females and 3 to 5 U/L for males), osteocalcin 8 and 5 ng/mL (normal 3 to 14 ng/mL), and BAP 16 and 15 U/L (normal 12 to 31 U/L for females and 15 to 41 U/L for males). Urine free DPD was 5.0 and 2.9 nmol DPD/mmol of Cr (normal 3.0 to 7.4 nmol/mmol for females and 2.3 to 5.4 nmol/mmol for males). The father's profile suggested low-normal remodeling.Mutation analysesMutation analysis of the patient's CLCN7, TCIRG1, and OSTM genes was notable only for a previously unreported heterozygous missense variation in CLCN7 (p.T198M). This seemed noncontributory to the DSS because it occurred in the healthy father and would affect an amino acid not conserved across species.(25)No mutations were detected in TNFRSF11A, TNFRSF11B, CSF1, CSF1R, or ANKH. However, in TNFSF11, encoding RANKL, we found a heterozygous single-base alteration predicting an amino acid change (c.107C > G, p.Pro36Arg). This missense variation also was identified in the patient's father, but not in her mother, and was not listed in dbSNP,(26) nor had it been reported in several association studies of RANKL polymorphisms.(27,28) However, we did find it (heterozygous) in 4 of 67 patients [4 of 134 alleles (3.0%)] with a variety of metabolic/dysplastic bone diseases (see “Discussion”) and homozygous in a man with an unusual, severe variant of Camurati-Engelmann disease.(29) Nevertheless, using this candidate gene approach, we did not identify a causal gene defect for the DSS that we presume was inherited in this family as an autosomal recessive trait. Microarray-based genomic copy-number analysis of the patient and parents also was unrevealing.TreatmentLowering excessive dietary calcium was advised to ensure that circulating PTH levels were not suppressed and thereby impairing bone resorption. Following her second inpatient evaluation, reduction from approximately 950 to 500 mg calcium (RDA) was recommended, but a food record suggested intake of 775 mg. Thereafter, even small changes seemed to explain wide swings in serum PTH levels (Table 1), in keeping with severe OPT.(30)No recommendation was made for bone marrow transplantation (see “Discussion”). Teriparatide was not prescribed, and PTH seemed ineffective in a previous patient.(6) Particular attention was paid to possible surgical intervention if narrowed cranial foramina

      additional phenotype and previous testing information to add to PMID 22875837 patient 1

    1. The proband from Family B

      Case# Christensen B

      CasePresentingHPOs HP:0011675 Arrhythmia, HP:0010872 T-Wave Inversion, HP:0005133 Right Ventricular Dilation, HP:0031317 Fatty replacement of ventricular myocardial tissue

      CasePreviousTesting amplicons were pre‐screened on a LightScanner High‐Resolution Melting Curve Analysis System

      CaseMethod1 PCR

      CaseGenotypingMethod (PCR) amplification was performed for all TMEM43 exons and flanking introns.

      Variant NM_024334.2(TMEM43):c.1073C>T (p.Ser358Leu)

      ClinVar 734

      VariantEvidence Is there any??????

    2. He died of progressive heart failure aged 68 years. Genetic screening identified a splice site variant, c.705+ 7G> A. None of his family members carried the variant.

      Case# Christensen A, 59 diagnosis, male

      CasePresentingHPOs HP:0004756 Ventricular Tachycardia, HP:0010872 T-Wave Inversion, HP:0005133 Right Ventricular Dilation, HP:0031317 Fatty replacement of ventricular myocardial tissue

      CasePreviousTesting amplicons were pre‐screened on a LightScanner High‐Resolution Melting Curve Analysis System

      CaseMethod1 PCR

      CaseGenotypingMethod (PCR) amplification was performed for all TMEM43 exons and flanking introns.

      Variant NM_024334.2(TMEM43):c.705+7G>A

      ClinVar 46152

      gnomAD 0.0007554 link

      VariantEvidence N/A

    1. we report a Chinese male patient carrying novel biallelic GDAP2 variants, c.757C>T (p.Arg253*) and c.1323delC (p.Thr442fs*7), who was diagnosed with SCAR27.

      MonDO: MONDO:0032706

      Case: Chinese male. Onset at age 30 years with mild dysarthria with progressive worsening.

      DiseaseAssertion: Cerebellar ataxia

      FamilyInfo: No history of neurological disease and consanguinity was documented in the family. Delivery and perinatal events were unremarkable.

      CasePresentingHPOs: HP:0001260, HP:0002141, HP:0002061, HP:0009046 (Dysarthria, Gait imbalance, Lower limb spasticity, Difficulty running

      CaseHPOFreeText: Difficulty writing, Increase in bilateral knee reflexes

      CaseNOTHPOs: HP:0003487 (Babinski sign)

      CasePreviousTesting: His clinical examination displayed cerebellar ataxia with abnormal finger-to-nose and heel-knee-shin tests. Bilateral knee reflexes were symmetrical increased (+++) and Babinski signs were negative. Cranial nerves, muscle strength and sensory examinations were normal. Mild cognitive decline with a Mini-Mental State Examination (MMSE) of 24/30, a Scale for the Assessment and Rating of Ataxia (SARA) score of 17.5/40 and International Cooperative Ataxia Rating Scale (ICARS) score of 46/100. Brain MRI revealed cerebellar atrophy (Fig. 1A).

      GenotypingMethod: WES with Sanger confirmation and co-segregation analysis. Genetic testing for spinocerebellar ataxias (SCAs) 1, 2, 3, 6, 7, 12, 17 and dentatorubral-pallidoluysian atrophy (DRPLA) were negative.

      VariantEvidence: Wildtype and mutant plasmids were transfected into SH-SY5Y cells. The mRNA level of frameshift variant p.Thr442fs7 was almost same with the level of wild-type, whereas nonsense variant p.Arg253 was even increased, thus they might escape NMD. As a result, p.Gln316 and p.Ser436fs36 mutant GDAP2 proteins were barely detectable, p.Thr442fs7, p.His400fs15 and p.Arg253 generated truncated proteins. Western blot analysis indicated that the GDAP2-Arg253 and GDAP2-Thr442fs*7 were C-terminal deletion mutants.

      MultipleGeneVariants:

      (1) GeneName: GDAP2

      (1) Variant: c.757C>T (p.Arg253*)

      (1) ClinVarID or CAID: CA1031554

      (1) gnomAD: Total AF 0.00001860, gnomAD v4.1 (https://gnomad.broadinstitute.org/variant/1-117899096-G-A?dataset=gnomad_r4)

      (2) GeneName: GDAP2

      (2) Variant: c.1323delC (p.Thr442fs*7)

      (2) ClinVarID or CAID: CA2586967196

      (2) gnomAD: not found in gnomAD v4.1

    1. c.169G>A

      Case# Baskin AT, Male

      CasePresentingHPOs HP:0004756, HP:0002119, HP:0010872

      CasePreviousTesting patients referred to our high-risk hereditary heart disorders clinic for assessment of possible ARVC, as well as DNA-bearing blood or tissue samples sent for clinical ARVC gene-testing from other physicians, clinics or institutions to our CLIA-approved molecular genetics laboratory at the Hospital for Sick Children (listed on www.genetests.org).

      CaseMethod1 PCR

      CaseGenotypingMethod direct sequence analysis of all exons and flanking intron sequences of DSP (MIM 125647), PKP2 (MIM 602861), DSC2 (MIM 125645), DSG2 (MIM 125671) and TMEM43.

      Variant NM_024334.2(TMEM43):c.169G>A (p.Ala57Thr)

      ClinVar 88981

      gnomAD 0.001381 link

    1. human mononuclear myoblasts

      CellLine: Human Mononuclear Myoblast

      CellEFO: CL:0000056

      GeneFunction: GO:0007015 (Actin Filament Organization)

      GeneAlteration: A wild-type C-terminal EGFP-tagged β-TM fusion gene was generated by amplifying TPM2 and cloning it into a vector while introducing XhoI and EcoRI restriction sites. All mutant constructs were formed by site-directed mutagenesis and cloning into E. coli. These constructs were sequenced to verify the correct coding sequence and introduction of the mutations. They were then introduced to human myoblast cells and mouse C2C12 cells via transfection.

      FunctionalEvidence: The expression of these TPM2 mutants in cultured cells demonstrated several morphological abnormalities reminiscent of those seen in nemaline myopathy patients. In the human myoblasts/differentiated cells, these included various types of aggregates including nuclear, cytoplasmic, endogenous, and perinuclear. Large accumulations of actin along with clouds around the nucleus and cytoplasm with unorganized structure were also present. Poor incorporation of stress fibers, what appeared to be disorganized sarcomeric structure, and rod-like structures both intranuclear and in the myotubes in particular all demonstrate clear similarities to those phenotypes seen in nemaline myopathy, namely the presence of nemaline rods, disorganized sarcomeres, and z-disc abnormalities. These two groups of pathologies also seem to share the same mechanism, specifically the TPM2 mutations destabilizing the actin-myosin structures and causing accumulation and abnormal structures to form. Similarly, the modified C2C12 myoblasts/myotubes also displayed peripheral and perinuclear aggregates in both stages of development as well as diffuse cytoplasmic labeling of stress fibers. They had difficulty differentiating, as they appeared to be fused rather than elongated and multinucleated. This further supports the connection between the gene disruption and the pathologies that are demonstrated here.

      CellVariant1: NM_003289.3:c.121G>A (p.Glu41Lys)

      ClinVar: 12464 http://www.ncbi.nlm.nih.gov/clinvar/variation/12464

      CellVariant2: NM_003289.3:c.142_144delAAG (p.Lys49del)

      ClinVar: 12466 https://www.ncbi.nlm.nih.gov/clinvar/variation/12466/

      CellVariant3: NM_003289.3:c.154_156dup (p.Gly52dup)

      ClinVar: 140485 https://www.ncbi.nlm.nih.gov/clinvar/variation/140485/

      CellVariant4: NM_003289.3:c.364G>A (p.Glu122Lys)

      CAID: CA373367963 http://reg.genome.network/redmine/projects/registry/genboree_registry/by_caid?caid=CA373367963

      CellVariant5: NM_003289.3:c.606C>G (p.Asn202Lys)

      ClinVar: 12467 https://www.ncbi.nlm.nih.gov/clinvar/variation/12467/

    1. (III-9 and III-10)

      Variant: only two daughters (III-9 and III-10) of our subject II-6 had marginally altered DBS reports (Neutral/acid: 36.0 and 38.1, reference: <30) and both of them also carried one of the mutations (c.2560C>T (rs121907943, p.Arg854Ter)) already identified on their mother. *Despite both of them having borderline results on one single DBS assessment, we have still considered them to have a carrier status in view of that they have remained asymptomatic until now.

    1. HA24Other14Bc.3625C>Tp.Q1209*NovelSevereNonsense

      Case#: Zahari_HA24

      Demographics:

      CasePresentingHPOs: HP:0003125 severe hemophiliac FVIII:C:<1%

      CaseNotHPOs:

      CasePreviousTesting: No

      CaseMethod1:

      CaseMethod2:

      CaseGenotypingMethod: F8 coding regions (26 exons) including the intron/exon boundaries and the promoter regions were amplified using 26 sets of primers and subsequently sequenced.

      Variant: NM_000132.3:c.3625C>T(p.Gln1209Ter)

      ClinVar:

      CAID: CA414895516

      gnomAD: Not Found

      VariantEvidence: The variant introduces a stop codon in exon 14 and premature truncation of the protein product. The variant is awarded default points

      CaseAddInfo:

      CasePMIDs:

    1. DNA from two Syrian families with H syndrome was analyzed through direct sequencing, and the expression of hENT3 in normal human skin was investigated by in situ hybridization and immunostaining. Results: We identified two novel mutations in the SLC29A3 gene: a homozygous splice site mutation IVS1+2T>G predicted to cause a splicing error, and a homozygous missense mutation c.1157G>A (p.R386Q) which substituted highly conserved amino acid residue in a transmembrane domain of hENT3. Furthermore, we demonstrate that hENT3 is expressed in histiocytes as well as in endothelium of blood and lymphatic vessels in normal human skin.

      unable to annotate in PDF.

      Case: Farooq Family 1 Proband, Syrian, female, 11yo at report, onset at 5yo

      CasePresentingHPOs: HP:0004322, HP:0001730, HP:0030044, HP:0000953, HP:0000998, HP:0000969, HP:0100651, HP:0030084, HP:0002240, HP:0001395,

      CasePresentingHPOsFreeText: Hyperpigmentation on lower extremities symmetrically and bilaterally, later the genital area as well with edema.

      CaseNOTHPOs:

      CaseNOTHPOSFreeText:

      CasePreviousTesting:

      CaseGenotypingMethod: All 6 exons including exon-intron boundaries of the SLC29A3 gene were amplified by PCR from the genomic DNA. Direct sequencing analysis. Restriction enzyme digest.

      Variant: c.1+2T>G homozygous

      ClinVarID: or CAID: 213676/CA377128556

      gnomAD: This splice site variant, c.1+2T>G found in intron 1, is absent from gnomAD v2.1.1. It is present in gnomAD v4.0.0 with a MAF of 0.00001024 (3/292950 alleles) in the European NF population and 0 homozygotes, but there is low coverage so the AF is not reliable.

      AddCaseInfo: consanguineous, heterozygous parents

      PreviouslyPublished: n/a

      VariantEvidence: n/a

    2. DNA from two Syrian families with H syndrome was analyzed through direct sequencing, and the expression of hENT3 in normal human skin was investigated by in situ hybridization and immunostaining. Results: We identified two novel mutations in the SLC29A3 gene: a homozygous splice site mutation IVS1+2T>G predicted to cause a splicing error, and a homozygous missense mutation c.1157G>A (p.R386Q) which substituted highly conserved amino acid residue in a transmembrane domain of hENT3. Furthermore, we demonstrate that hENT3 is expressed in histiocytes as well as in endothelium of blood and lymphatic vessels in normal human skin.

      unable to annotate in PDF.

      Case: Farooq Family 2 Proband, Syrian, female, 16yo at report, onset at 1wk old

      CasePresentingHPOs: HP:0030148, HP:0001629, HP:0033190, HP:0004322, HP:0012785, HP:0001730, HP:0002240, HP:0001395

      CasePresentingHPOsFreeText: Hyperpigmentation on thighs and later genital area. Hearing started deteriorating progressively after an ear infection. Fasting blood glucose was elevated (350 mg/dl).

      CaseNOTHPOs:

      CaseNOTHPOSFreeText:

      CasePreviousTesting:

      CaseGenotypingMethod: All 6 exons including exon-intron boundaries of the SLC29A3 gene were amplified by PCR from the genomic DNA. Direct sequencing analysis. Restriction enzyme digest.

      Variant: p.R386Q homozygous

      ClinVarID: or CAID: 39870/CA130660

      gnomAD: The missense variant p.Arg386Gln is present in gnomAD v4.0.0 with a MAF=0.00003999 (3/75018 alleles) in the African/African American population and 0 homozygotes.

      AddCaseInfo: Consanguineous, heterozygous parents. Proband's younger sister was also reported by the parents to be affected, but was not examined by the authors or genotyped.

      PreviouslyPublished: n/a

      VariantEvidence: n/a

    1. Apoptosis assay

      PatientCell: CL:0000187 (Muscle Cell)

      GeneFunction: Muscle Cell Apoptotic Process (GO:0010657)

      GeneAlteration: Samples were collected from deltoid muscle biopsy of control individuals and LGMD2C individuals with the 525delT founder mutation. No further alteration necessary.

      FunctionalEvidence: TUNEL staining was perfomed on muscle samples from LGMD2C patients and healthy controls to test for cell apoptosis. No positive staining was detected in any control individuals while it was commonly found in the patient muscle. This indicates that a result of SGCG disruption is increased cellular apoptosis likely contributing to the myofiber degeration and muscle atrophy seen commonly in LGMD patients.

      FAVariant: NM_000231.2(SGCG):c.525del (p.Phe175fs)

      ClinVarID: 189243 https://www.ncbi.nlm.nih.gov/clinvar/variation/189243/

    1. 11

      Case: Individual 11, male, AOR= 14 years

      CasePresentingHPOs: HP:0001263, HP:0000750, HP:0001256, HP:0000752, HP:0001575, HP:0000276, HP:0000286, HP:0000278, HP:0000347, HP:0001182, HP:0001763, HP:0001852, HP:0011330, HP:0001382, HP:0002719, HP:0000540, HP:0000486, HP:0002967, HP:0001065, HP:0001724, HP:0010499, HP:0000243

      CasePresentingHPOText: Began walking at 24 months old.

      CaseNOTHPOs: HP:0001250, HP:0002376, HP:0012443,

      CasePreviousTesting: Array-CGH (244K Agilent) normal, Fragile X syndrome (FMR1 Repeat analysis) normal, Loeys-Dietz syndrome (TGFBR1 and TGFBR2) normal and Marfan syndrome (FBN1) normal

      CaseGenotypingMethod: WES (Agilent CRE and HiSeq 4000), searching for variants in FBXO11 after identification of variant in I13, Sanger confirmation to show de novo status and absence in parents. Sample identity confirmed.

      Variant: hg19:chr2: g.4806002 0C>G, c.1042- 1G>C, p.(?) OR NM_001190274.1:c.1042- 1G>C(p.=)

      CA ID: CA346765998

      de novo splice site mutation.

      gnomAD: n/a

      AddCaseInfo:

      VariantEvidence: The c.1042-1G>C mutation is most likely a splice site mutation. The mutation arises in exon 9 (Intron 8), and likely would disrupt exon 9 transcription. Exon 9 does not transcirbe any of the funcitonal domains, but exon 10 comprises the NosD domain, which is 5' to the first CASH domain. No functional assays or variant evidence was provided, so I have downgraded the score.

    2. 2

      Case: Individual 2, female, AOR= 8yo

      CasePresentingHPOs: HP:0001263, HP:0000750, HP:0002342, HP:0007359, HP:0002500, HP:0001290, HP:0002360, HP:0000729, HP:0000739, HP:0025269, HP:0000490, HP:0001840, HP:0000486

      CasePResentingHPOText: Began walking at 22 months, first words at 2yo,. Seizure onset at 7 yo and are focal, and occur nightly. Reduced white matter bulk on MRI. Referred to as having intoeing or pigeon-toed. Low APGAR scores, brief resuscitation required

      CaseNOTHPOs: HP:0002376, HP:0000202, HP:0000924, HP:0002719,

      CasePreviousTesting: ArrayCGH, Fragile X (FMR1), Angelman Syndrome (methylation & UBE3A), Rett syndrome (MECP2), Pitt-Hopkins Syndrome (TCF4), and extensive metabolic screening were all normal

      CaseGenotypingMethod: Trio-WES performed through the DDD consortium, 2017 PMID:PMID: 28135719.

      Variant: hg19:chr2: g.48066586T>A, c.414A>T, p.(Arg138Ser) or NM_001190274.1:c.414A>T

      CA ID: CA346813374

      de novo Trio-WES performed by DDD so maternity and paternity could be investigated with this method.

      gnomAD: n/a

      AddCaseInfo: Case was part of the DDD study 2017 PMID: 28135719,

      VariantEvidence: Arg138 is located N-terminal to the F-box region of FBXO11, and is conserved across species. Pathogenicity algorithms showing varying predictions, from tolerated to damaging, thus indicating a VUS. No functional assays were performed to indicate the impact of the R138S mutation on FBXO11 function.

    1. A novel deletion (IVS11+3del4) identified in the human PAX6 gene in a patient with aniridia

      PMID:

      Gene: PAX6

      Variant NM_000280.5:c.333C>A(p.Val111=)

      Disease: Ocular dysgenesis

      InheritancePattern: AD

      Notes In Table 1. and Figure 3 there are nice illustrations of the consequences of this variant leading to a 27bp truncation in exon 6, in frame, which causes an AA deletion p.Cys112_Val120del version of PAX6. No patient phenotype data is available.

    1. 1 Hurler 3Y1M F (+) 704ins5/704ins5 (+) 89 (3YlM) hepatoinegaly (-) unknown

      Case#: Yamagishi Case 1, female, 3yo1mo, Japanese

      DiseaseAssertion: MPS1-Hurler

      FamilyInfo: consanguinity

      CasePresentingHPOs: HP:0001510, HP:0002240

      CaseHPOFreeText: mental delay, height -1.5SD

      CaseNotHPOs:

      CaseNotHPOFreeText: cardiac involvement

      PreviouslyPublished: n/a

      Variant: 704ins5 homozygous

      ClinVar: 11921

      CAID: CA256123

      SupplementalData: n/a

    1. II:1

      Case#: Family IV-II:1, 58 years old, male

      CaseHPOs: HP:0003563 (decreased LDL cholesterol)

      CaseHPOsFreeText: Type 2 diabetes and severe non-alcoholic steatohepatitis (NASH) with pre-cirrhotic lesions and well differentiated hepatocellular carcinoma (HCC) diagnosed on liver biopsy

      CasePreviousTesting: TC 120 mg/dl, LDL-C 50 mg/dl, HDL-C 55 mg/dl, TG 89 mg/dl (see additional values in Table 1) ApoB100 19 mg/dl (normal range 49-88) (Supplemental data)

      Variant: NM_000384.2:c.11153C>G (p.Ser3718Ter), heterozygous

      CAID: CA345983128

      gnomAD: Absent

      Variant evidence: APOB- p.Ser3718* mutations lead to the formation of expected truncated ApoB forms (ApoB-81) of 418 kDa (Fig. 1C, right panel) that can be secreted by the liver and lipidated.

      CaseAddInfo: Son of Family IV-I:1

    2. II:1

      Case#: Family II-II:1, 41 year old, male

      CaseHPOs: HP:0003563, HP:0001397 (decreased LDL cholesterol, hepatic steatosis)

      CaseHPOsFreeText: Prediabetes

      CasePreviousTesting: TC 113 mg/dl, LDL-C 38 mg/dl, HDL-C 69 mg/dl, TG 32 mg/dl (see additional values in Table 1). ApoB100 22 mg/dl (normal range 49-88) (Supplemental data). Normal ranges- total cholesterol (TC) 92-234 mg/dl, LDL-cholesterol (LDL-C) 136-174 mg/dl, HDL-cholesterol (HDL-C) 60-95 mg/dl), triglyceride (TG) 35-132 mg/dl.

      CaseGenotypingMethod: Next generation sequencing panel for high-throughput sequencing of the coding regions of genes previously linked to FHBL (APOB, PCSK9, ANGPTL3) and ABL (MTTP, SAR1B). Sanger sequencing was performed for validation.

      Variant: NM_000384.2:c.7711C>T (p.Gln2571Ter), heterozygous

      CAID: CA43502110

      gnomAD: Absent

    3. Family III

      Family#: Family III

      PresentingHPOs: HP:0003563 (decreased LDL cholesterol)

      PresentingHPOsFreeText: FHBL diagnosis was based on low levels of fasting calculated plasma LDL-C < 50 mg/dL without lipid lowering therapy. Affected relatives were diagnosed by LDL-C < 80 mg/dL and/or ApoB <50 mg/dL.

      FamilyMethod1: Next generation sequencing

      FamilyGenotypingMethod: Next generation sequencing panel for high-throughput sequencing of the coding regions of genes previously linked to FHBL (APOB, PCSK9, ANGPTL3) and ABL (MTTP, SAR1B). Sanger sequencing was performed for validation and co-segregation analysis among family members.

      ProbandLabel: Family III-II:2

      Variant: NM_000384.2:c.8799C>A (p.Cys2933*), heterozygous

      CAID: CA345993342

      gnomAD: Absent

    1. R628X/R628X6 (1.6%)

      Case#: Severe MPS1 patients, 6 individuals with this genotype

      DiseaseAssertion: Severe MPS I

      FamilyInfo: n/a

      CasePresentingHPOs:

      CaseHPOFreeText:

      CaseNotHPOs:

      CaseNotHPOFreeText:

      CasePreviousTesting: n/a

      GenotypingMethod: n/a

      PreviouslyPublished: possible

      Variant: R628X/R628X

      ClinVar: 550421

      CAID: CA2802462

      SupplementalData: Table S1 also lists this variant one time in compound heterozygosity with Q70X

    1. 2.1.14 year/MDistended abdomen, developmental delayNo − PathogenicIDUAc.1882C > Tp. Arg628TerHomMPS I

      Case#: Patient 2.1.1, male, 4yo, Indian

      DiseaseAssertion: MPS1

      FamilyInfo: No family history reported, but said not to be consanguineous

      CasePresentingHPOs:

      CaseHPOFreeText: Distended abdomen, developmental delay

      CaseNotHPOs:

      CaseNotHPOFreeText:

      GenotypingMethod: NGS, Sanger

      PreviouslyPublished:

      Variant: c.1882C > T p. Arg628Ter homozygous

      ClinVar: 550421

      CAID: CA2802462

      SupplementalData: n/a

    1. Family 5/Case 1/M/43 + +/+ + +/+ Diffuse myalgia + RRFs/COX - + NA c.1635 C > G (p.S545R)

      Case#: Family 5 Case 1, male, 43yo, south France

      DiseaseAssertion: OA plus

      FamilyInfo: mother and brother also had optic atrophy, but further details such as genotype and more phenotype information were not confirmed

      CasePresentingHPOs: HP:0000648, HP:0000508, HP:0000365, HP:0001251, HP:0002403, HP:0003326, HP:0009830, HP:0003200, HP:0000590, HP:0003688, HP:0003390,

      CaseHPOFreeText: visual impairment since childhood, colic occlusion without any evident mechanical cause, impaired sensation to all modalities predominantly in the lower limbs, atrophy of the corpus callosum and brainstem and a mild cerebellar atrophy, bilateral basal ganglia hypointensity was detected at T2-weighted MRI scan

      CaseNotHPOs:

      CaseNotHPOFreeText:

      PreviouslyPublished:

      PreviousTesting: Direct sequencing of the complete coding region and the exon/intron boundaries of the genes POLG1, PEO1 (Twinkle) and SLC25A4 (ANT1). mtDNA multiple deletions present.

      GenotypingMethod: genomic DNA was amplified by PCR with specific primers designed to amplify all exons and flanking intronic regions and sequenced. Southern blot analysis, long-range PCR, sequencing in both directions, and quantitation of mtDNA relative to nuclear DNA was performed on mtDNA

      Variant: c.1635 C > G (p.S545R)

      ClinVar: 30461

      CAID: CA10575554

      SupplementalData:

    1. Fig. 2

      NonPatientCell Mouse cell line, EFO:0002887 "Myotubes generated from the homozygous dysgenic (mdg/mdg) mouse cell line GLT were cultured as described previously (44)."

      GeneAlteration GFP tagged point mutation transfected into mouse cells

      FunctionalEvidence Variant increased channel sensitivity to caffeine/voltage (fig. 2)

      FAVariants NM_000069.2(CACNA1S):c.3257G>A (p.Arg1086His), ClinVar ID: 17626

      NM_000445.4(PLEC):c.3719G>A (p.Arg1240His), ClinVar ID: 448061

    1. Four patients (2 males, 2 females)

      Case#: Fateen_P4

      Demographics: Egyptian

      CasePresentingHPOs: HP:0000768, HP:0000943, HP:0002857, HP:0000256, HP:0002808, HP:0001382, HP:0005072, HP:0009769 prominent proximal metaphyses

      CaseNotHPOs:

      CasePreviousTesting:

      CaseMethod1:

      CaseMethod2:

      CaseGenotypingMethod: single gene seq by Sanger of all 14 exons and restriction digest confirmation/ screening of parents and controls

      Variant: NM_000512.5(GALNS):c.119A>G (p.Asp40Gly)

      ClinVar: 1048369

      CAID: CA397100962

      gnomAD: n/a

      VariantEvidence: hydrophillic>hydrophobic substitution in putative active site and enzyme activity data shows low enzyme function compared to reference range

      CaseAddInfo:

      CasePMIDs:

    1. o determine the frequency of MYOZ2 mutation in HCM, we screened all exons and exon–intron boundaries of MYOZ2 in 516 probands by direct sequencing. We detected another heterozygous missense A→G mutation at nucleotide 50 278 in a white proband who had 2 deceased siblings with HCM. The mutation changed amino acid isoleucine 246, a conserved amino acid, to methionine

      Case 2: male, Dx = n/a, variant identified via direct sequencing

      HP:0001712 (left ventricular hypertrophy)

      Variant: NM_016599.4(MYOZ2):c.738A>G (p.Ile246Met)

      non-LOF

      ClinVar ID: 30509, conflicting interpretations of pathogenicity,<br /> https://www.ncbi.nlm.nih.gov/clinvar/variation/30509/

      ExAC Score: 0.001897, http://gnomad.broadinstitute.org/variant/4-120107298-A-G

    2. The index case presented at 12 years of age with symptoms of diastolic heart failure and episodes of syncope (supplemental Table I available in the online data supplement available at http://circres.ahajournals.org.). She had severe left ventricular hypertrophy with a septal thickness of 3.2 cm, atrial fibrillation, and runs of ventricular tachycardia.

      Case: Family 109, female, Dx = 12 yrs, septal thickness 3.2cm

      Family had 6 affected individuals sharing MYOZ2 haplotype 4q26-q27

      HP:0001635, HP:0001279, HP:0001712, HP:0005110, HP:0004755

      heart failure, syncope, left ventricular hypertrophy, atrial fibrillation, supraventricular tachycardia

      Variant: NM_016599.4(MYOZ2):c.142T>C (p.Ser48Pro)

      Pathogenic, non-LOF

      ClinVar ID: 30508 https://www.ncbi.nlm.nih.gov/clinvar/variation/30508/

      Not in ExAC or gnomAD

    1. The proposita (II-1 in Fig. 1A)

      Case# II-1, F, 13yo diagnosis, European

      CasePresentingHPOs HP:0001254, HP:0001137, HP:0025404, HP:0008936, HP:0002509, HP:0025430, HP:0003739, HP:0002353, HP:0001508, HP:0000297, HP:0010804, HP:0000218, HP:0000347, HP:0001212, HP:0001864, HP:0040082, HP:0012167, HP:0030820, HP:0000276, HP:0000268, HP:0000549, HP:0000678, HP:0012166, HP:0002465

      HPOcont: Lethargy, Alternating esotropia, Abnormal visual fixation, Muscular hypotonia of the trunk, Limb hypertonia, High-pitched cry, Myoclonic spasms, EEG abnormality, Failure to thrive, Facial hypotonia, Tented upper lip vermilion, High palate, Micrognathia, Prominent fingertip pads, Clinodactyly of the 5th toe, Happy demeanor, Hair-pulling, Hooded eyelid, Long face, Dolichocephaly, Abnormal conjugate eye movement, Skin-picking, Poor speech

      Free Text: "Birth weight, length and head circumference were 3.149 kg (−0.18SD), 51 cm (+0.99SD), and 33 cm (−0.74SD), respectively. Although she did not cry immediately and was described as sleepy and lethargic, her Apgar scores were 8 and 9 at 1 and 5 minutes, respectively. She has had poor weight gain throughout life. By 2 months of age, she developed alternating esotropia, poor visual fixation, truncal hypotonia, upper and lower extremity hypertonia and a high-pitched cry. She also had myoclonic jerks and jerky movements of her extremities. Her weight, height and head circumference were 4.6 kg (−1.57SD), 51 cm (−3.81 SD) and 39.2 cm (+0.06SD), respectively. A head CT scan detected no anatomical anomalies. An EEG showed excessively slow background without epileptiform activity. Despite intervention, her weight gain continued to fall off, and she was diagnosed with failure to thrive. She rolled over at age 6 months, sat unsupported at 1 year. A follow-up EEG at 14 months showed a slow dysrhythmic background compatible with a seizure predisposition and diffuse cerebral dysfunction. A brain MRI at 18 months of age showed normal anatomy and myelination. In the ensuing months, she demonstrated a happy disposition, low truncal muscle tone and distal hypertonia as well as a myopathic facial appearance, a tented upper lip, a high arched palate, micrognathia, prominent finger pads and mild fifth toe clinodactyly. At age 4 years and 1 month, a developmental assessment defined her overall functioning at no more than a 12-month-old equivalent; she was not autistic. At age 6 years and 11 months, she manifested sparse hair (trichotillomania), hooded eyelids, high arched palate, thin long face and mild micrognathia. At age 12 years, she walked with the support of splints. Her height, weight and head circumference were 127 cm (−3.64 SD), 22.6 kg (−4.06 SD), and 52 cm (−0.94SD), respectively. Her features included dolicocephaly, hooded eyelids, intermittently disconjugate gaze, sparse hair, high palate and crowded dentition. Developmental assessment documented behavioral difficulties including repetitive and self-stimulatory behaviors, sensory issues such as repetitively rubbing her hands on the floor and/or licking them and mouthing objects, rigidity, communication deficits, difficulties with emotional regulation and aggression when frustrated. Her aggression included the self-injurious behaviors of dermatillomania, biting and trichotillomania. She communicated with a few words, signs, gestures and a picture exchange communication system (PECS). She developed menses at age 13 years."

      CasePreviousTesting "Family history was negative for intellectual disability, multiple congenital anomalies and recurrent miscarriages. Normal genetic investigations included a karyotype (550 band resolution), subtelomeric FISH, methylation studies of SNRPN, sequence analysis of UBE3A, and DMPK repeat analysis. Normal metabolic tests included transferrin isoelectric focussing, CSF amino acids and neurotransmitters, plasma amino acids, urine organic acids, urine purines and pyrimidines, serum acylcarnitines, blood ammonia and blood lactate. She also had normal audiological testing."

      CaseMethod1 WES

      CaseMethod2 Sanger

      CaseGenotypingMethod SNP array and WES, confirmed with Sanger qt/rtPCR

      Variant (1) NM_032504.1:c.3983-3_3994delinsA (p.Ser1328Argfs19), (2) NM_032504.1:c.2431C>T (p.Arg811)

      CAID (1) CA658820714, (2) CA350137388

      VariantEvidence skin fibroblasts from affected sister showed no unc80 mRNA.

      CaseAddInfo nonconsanguineous, confirmed in trans. Affected sister with similar phenotypes died of respiratory distress at age 7.

    1. Haplotype analyses using exon-specific primers (Table S3) on families 1, 4, and 5 showed they carried the allele on a common founder haplotype and suggested that the c.713C>T (p.Ser238Leu) change is a founder variant

      Family Name: Family 5

      FamilyPresentingHPOs: HP:0000705

      FamilyNotHPOs:

      CountryOrigin: Turkey

      Ethnicity: Turkish

      Race: n/a

      FamilyPreviousTesting: candidate gene sequencing, array comparative genomic hybridization, or exome sequencing

      FamilyGenotypingMethod: WES

      Affected: 1

      Unaffected: 4

      Segregations: n/a

      PublishedLOD: n/a

      eLOD: n/a

      AddSegregationInfo: non-consanguineous family

      ProbandLabel:

      Variant: NM_033068.2(ACP4):c.713C>T (p.Ser238Leu)

      ClinVar or CAID: 374862, https://www.ncbi.nlm.nih.gov/clinvar/variation/374862/

      genomAD: 8.127e-6, http://gnomad.broadinstitute.org/variant/19-51297008-C-T

      FamilyAddInfo: parents unaffected

      CasePresentingHPOs: HP:0006316, HP:0006297, HP:0011055, HP:0011079, HP:0011073

      CasePresentingHPOTerm: wide interdental spacing due to thin enamel, missing second mandibular permanent molar, maxillary canine not yet erupted, black staining on maxillary anterior teeth and first permanent molars, brown staining on posterior teeth

      CaseNotHPOs: HP:0010299

      AddCaseInfo:

      VariantEvidence:

    1. 11 years. Her

      Case# Postma 3:3, female, 11yo, white

      CasePresentingHPOs HP:0004758, HP:0001688

      CasePreviousTesting no

      CaseMethod1 PCR

      CaseGenotypingMethod amplified/screen of CASQ2, SCN5A, HRC, PLN, RYR2, KCNQ1, KCNH2, and KCNK1 genes

      Variant NM_001232.3(CASQ2):c.97C>T (p.Arg33Ter)

      ClinVar 41043 link

      gnomAD 0.000008968 link

      VariantEvidence not in this article

    1. DD

      Case#: DD, 21 years, female

      CasePresentingHPOsFreeText: apo-B plasma levels <2% of normal and > 50% acanthocytes; total cholesterol 1.27 (normal range 4-6.5 mmol/l), triglyceride 0.3 (normal range 0.3-1.8 mmol/l), apoB 1.5 (normal range 60-140 mg/dl), “virtually no LDL”; diagnosed with “homozygous” (i.e. biallelic) familial hypobetalipoproteinemia because both parents (AD and PD) had total plasma cholesterol and apo-B levels below the 5th percentile. Designated as the proband in the paper. However, only one variant identified (note that full gene sequencing was not performed”), and therefore PD (mother of DD) was added as the proband here as she is heterozygous for the variant and has lipid levels consistent with this.

      PresentingNotHPOsFreeText: No neurological or retinal disease.

      CasePreviousTesting: On Western blot a truncated species of apo-B was found in the VLDL/chylomicron fraction (fig. 3), predicted based on size to be at the 5’ end of exon 26. The protein was absent from the HDL or infranate fractions.

      CaseGenotypingMethod: Genomic DNA was digested with a panel of restriction enzymes and Southern blotted. Based on truncated apoB size (detected on Western blot), the variant was predicted to be at the end of exon 26. Approximately 1.7 kb of genomic DNA including exon 26 was amplified by the polymerase chain reaction (PCR), cloned into M13, and sequenced.

      Variant: Variant 1: NM_000384.3(APOB):c.5463del (p.His1822fs)

      ClinVar: Variant 1 17882 Variant 2 – Not identified (not that full gene sequencing was not performed)

      gnomAD: Variant 1 - 0.000008797 (European non-Finnish) Variant 2 – Not identified ((not that full gene sequencing was not performed)

      CaseAddInfo: PD (mother) had the truncated apo-B (apo-B39) in both her VLDL and LDL lipoprotein fractions, but it was present at reduced levels compared to the apo-B100 arising from her one normal apo-B allele (fig. 3). Only apo-B100 and apo-B48 were detected in the father, AD.

    1. The c.121A>T mutation is located in exon 1 and creates a premature stop codon at amino acid 41. This stop codon is predicted to result in nonsense-mediated messenger RNA (mRNA) decay (NMD) and the loss of the homeobox functional domain.

      Families 1 and 2

      Variant, NKX6-2: c.121A>T; p.Lys41∗ (NM_177400.2), results in stop codon at amino acid 41 resulting in mRNA decay which causes the loss of the functional homeobox.

    1. Dutch patient

      Case1: Female, 12 yrs onset, Dutch

      CasePresentingHPOs: HP:0002093, HP:0001288, HP:0003690, HP:0010628, HP:0003722, HP:0003202, HP:0003798 (Respiratory insufficiency, Gait difficulties, Limb muscle weakness, Facial muscle weakness, Neck flexor weakness, Muscle hypotrophy, Nemaline rods)

      HPOsFreeText: Mild form of nemaline myopathy, Wheelchair from the age of 48, Selective hypotrophy of Type 1 muscle fibres

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: No family history of neuromuscular disorders, Variant was not detected in healthy mother or 7 unaffected siblings, Father was deceased so no sample was available

      CasePreviousTesting: N/A

      CaseGenotypingMethod: Genomic DNA and RNA was extracted from blood or lymphoblastoid cell lines. SSCP was used to analyze all 10 exons of TPM2. After locating the mutations, RT-PCR was used to confirm the mutated allele expression and haplotype analysis was performed on the probands and their family.

      Variant: NM_003289.3:c.440A>C (p.Gln147Pro)

      ClinVar: 12461 https://www.ncbi.nlm.nih.gov/clinvar/variation/12461/

      gnomAD: Not in gnomAD

    1. Family tree for patients UB609 and UB612 (arrows). The germ line SAMD9L mutation status is shown for the family members; +/−, heterozygous c.C2956T; +/+, no mutation. Patient UB612 (IV-1) was diagnosed with severe BMF and monosomy 7 without BM dysplasia at the age of 13 months. Transplantation was planned but eventually cancelled because his blood cell counts improved spontaneously. This patient is now 5 years old, without residual cytopenia or monosomy 7. His mother, patient UB609 (III-2), experienced a rather similar story 32 years previously; when she was 13 months old she was diagnosed with severe AA and BM transplantation was planned, which was also cancelled due to spontaneous improvement. Although they were not included in our IBMF cohort, we managed to investigate more patients in this family. The mother’s sister (III-3) also had early transitory pancytopenia, and both sisters, now aged 33 and 37 years, are doing well. Interestingly, the grandmother (II-2) had a cerebellar atrophy with ataxia, a nystagmus and the SAMD9L mutation found in her oral swab, whereas her own mother (I-2) also had the same neurological phenotype but could not be genetically explored. (G) Blood cell counts over time for patient UB612. The red curve indicates the hemoglobin concentration (Hb); light brown, the absolute neutrophil count (ANC); whereas the blue line indicates platelet counts (Pt). The gray area indicates the detection of monosomy 7 on marrow karyotyping.

      Family#PresentingHPOs HP:0000639

      FamilyNotHPOs HP:0001251, HP:0001876, HP:0005528

      CountryOrigin France

      Family#Method1 WES

      Family#Method2 Sanger

      FamilyGenotypingMethod WES results confirmed with Sanger

      Affected 3

      Unaffected 2

      Segregations 3

      AddSegregationInfo family not to score

      ProbandLabel UB612, M, 13mo diagnosis

      CasePresentingHPOs HP:0005528, HP:0000639, HP:0001876

      CaseAddInfo "Transplantation was planned but eventually cancelled because his blood cell counts improved spontaneously," possibly due to UPD.

      Variant NM_152703.4(SAMD9L):c.2956C>T (p.Arg986Cys)

      ClinVar 446530

      VariantEvidence (Figure 5) 293FT cells transfected with p.Arg986Cys showed more limited cell proliferation than WT SAMD9L in 28202457

      FamilyAddInfo Monosomy 7 in IV:1, mother and aunt also recovered, likely due to UPD or revertant mosaicism

    1. two unrelated patients

      CaseRoma: France

      CasePresentingHPOs: HP:0006785, HP:0003236, (Limb-girdle muscular dystrophy, Elevated serum creatine kinase)

      HPOsFreeText: Wheelchair bound before 14 yrs

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: Probands are from consanguineous gypsy families supporting a founder event, This mutation segregated with the disease in 18 patients and all asymptomatic parents were heterozygous, 15 siblings were heterozygous and asymptomatic except for a moderate increase in Serum CK in some

      CasePreviousTesting: Duchenne-like clinical presentation, Males and females equally affected, Normal dystrophin and decreased level of α- and γ-SG in muscle specimens

      CaseGenotypingMethod: DNA was isolated from peripheral blood leukocytes and subject to PCR amplification for linkage analysis. Total RNA was extracted from muscle biopsies and cDNA synthesis was performed and amplified. This was sequenced and analyzed for mutations.

      Variant: NM_000231.2(SGCG):c.848G>A (p.Cys283Tyr)

      ClinVar: 2006 https://www.ncbi.nlm.nih.gov/clinvar/variation/2006/

      gnomAD: 0.000008796, https://gnomad.broadinstitute.org/variant/13-23898652-G-A

      Affected: 18

      Unaffected: At least 29

      Segregations: N/A

      SegregationAddInfo: Candidate Gene Sequencing

    1. the Arg73Gln (exon 3) mutation was identified in the proband (II:1), a 28-year-old male who had been diagnosed with FHC at age 18 years and on echocardiography was found to have severe asymmetric septal hypertrophy. He has a family history of FHC, but other family members have not been willing to participate in further evaluation. Previous genetic screening of sarcomere genes identified two missense mutations in myosin-binding protein C (MyBPC3; Asp745Gly and Pro873His)

      Proband 1: male, Dx at 18 years, LV septal wall thickness = 30mm, family history of HCM with father and brother affected

      HP:0001639, HP:0001670

      Hypertrophic cardiomyopathy, asymmetric septal hypertrophy

      Variant: NM_145046.4(CALR3):c.218G>A (p.Arg73Gln).

      Not in ClinVar

      ExAC Score: Overall 1.624e-5

      http://gnomad.broadinstitute.org/variant/19-16601357-C-T

    1. Patient 2

      Case2: Female, Birth onset, Germany

      CasePresentingHPOs: HP:0003552, HP:0001558, HP:0002375, HP:0002747, HP:0004887, HP:0001385, HP:0001537, HP:0000023, HP:0012418, HP:0000278, HP:0000347, HP:0000470, HP:0001276, HP:0002808, HP:0001376, HP:0002063, HP:0011968, HP:0000975, HP:0003236, HP:0000938, HP:0009803, HP:0030084, HP:0001561, HP:0002828, HP:0005949, HP:0001284, HP:0003198, HP:0003557, HP:0003687, HP:0010602 (Muscle stiffness, Decreased fetal movement, Hypokinesia, Respiratory insufficiency due to muscle weakness, Respiratory failure requiring assisted ventilation, Hip dysplasia, Umbilical hernia, Inguinal hernia, Hypoxemia, Retrognathia, Micrognathia, Short neck, Hypertonia, Kyphosis, Limited joint motion, Rigidity, Feeding difficulties, Profuse sweating, Elevated serum creatine phosphokinase, Osteopenia, Shortened phalanges, Clinodactyly, Polyhydramnios, Multiple joint contractures, Apneic episodes in infancy, Areflexia, Myopathic changes, Increased variability in muscle fiber diameter, Centrally nucleated skeletal muscle fibers, Type 2 muscle fiber predominance)

      HPOsFreeText: Tracheostomy performed, Bladder catheter required, Inability to sit or roll, Increased echogenicity on muscle ultrasound, Treatment with carbamazepine, benzodiazepines, and baclofen reportedly provided no substantial benefit, Difficulty sitting due to hyperactivity of hip extensors, Mini rods and z-band broadening were seen in atrophic fibers

      CaseNotHPOs: HP:0100543, HP:0003730, HP:0002486, HP:0002353, HP:0002363, HP:0000496, HP:0003202, HP:0003798 (Cognitive impairment, EMG: myotonic runs, Myotonia, EEG abnormality, Abnormality of brainstem morphology, Abnormality of eye movement, Skeletal muscle atrophy, Nemaline bodies)

      NotHPOsFreeText: Abnormal metabolic screening, Muscle fiber type grouping

      CaseAddInfo: Case is de novo and confirmed via parental testing

      CasePreviousTesting: Negative ACTA1 and CRYAB

      CaseGenotypingMethod: Based on the Patient 1 results, the same region of TPM3 (Exon 6) was PCR amplified and sequenced in the proband and her parents via bidirectional Sanger sequencing.

      Variant: NM_152263.4(TPM3):c.654_656AGA[1] (p.Glu219del)

      ClinVar: 235144 https://www.ncbi.nlm.nih.gov/clinvar/variation/235144/

      gnomAD: Not in gnomAD

    1. Here, we report the identification and cDNA analysis of four intronic and three exonic OPA1 gene mutations that cause a variety of splicing defects including activation of cryptic splice sites in either flanking exon or intron sequences, and a leaky splicing mutation. Our results show that cDNA analysis is of prime importance for the full evaluation of the effect of putative splicing mutations in the OPA1 gene.

      Article is a PDF, so annotating here.

      Case#: OAK 96

      DiseaseAssertion: clinical dx of adOA based on ophthalmological examination

      FamilyInfo:

      CasePresentingHPOs:

      CaseHPOFreeText:

      CaseNotHPOs:

      CaseNotHPOFreeText:

      GenotypingMethod: All 30 coding exons of the OPA1 gene were amplified from genomic DNA by means of PCR. PCR and RT-PCR products were sequenced employing BigDyeTerminator Chemistry (Applied Biosystems, Darmstadt, Germany) and separated on an ABI 3100 DNA Sequencer

      PreviouslyPublished: n/a

      Variant: c.1705+1G>T (p.V556fsX596)

      CAID: CA10576007

      SupplementalData:

      AdditionalInfo: Generation of minigene constructs and heterologous expression in COS7 cells allowed for cDNA analysis of the c.1705+1G>T mutation. This revealed a deletion of the last 40 nucleotides in exon 17 resulting from a splicing event that involves a cryptic splice donor site within exon 17 resulting in a frameshift and premature translation termination (p.V556fsX596).

    1. SD9 F I 25.2 (L) 90 c.850C>T (p.R284X) c.850C>T (p.R284X)

      Case: Zampieri SD9, Female

      DiseaseAssertion: Sandhoff Disease

      FamilyInfo: patient's genotype was confirmed in parents

      CasePresentingHPOs: HP:0000007, HP:0033978

      CaseHPOFreeText: neurological symptoms (unspecified)

      CaseNOTHPOs:

      CaseNOTHPOFreeText:

      CasePreviousTesting: Patients presented with neurological symptoms and diagnosis was confirmed by the demonstration of reduced Hex A and Hex B activity in peripheral white blood cells or cultured fibroblasts.

      GenotypingMethod: PCR

      PreviouslyPublished: n/a

      SupplementalData: n/a

      Variant: c.850C>T (p.R284X) same on both alleles

      CAID: CA116495

      gnomAD: MAF: 0.0002286 South Asian, gnomAD variant ID: 5-74009409-C-T

      VariantEvidence: PMID:8162015 previously reported this variant to be associated with the infantile form of SD. A fibroblast line from this patient with the infantile form of the disease was investigated for mutations by single strand conformation polymorphism analysis and direct sequencing of PCR products. A nonsense mutation was found which generated a stop codon at codon 284. The study investigated the steady-state level of mRNA produced by cells containing stop codons using a competitive polymerase chain reaction technique and found that at codon 284, the mRNA levels were 0.8%, as percent of normal per single gene dose.

    1. Figure 1 The pedigrees of families CL‐16 and CL‐13.

      Family CL-16: FamilyInfo: Japanese and German ancestry Proband II.2: had large aneurysm of sinuses of Valsalva and ascending aorta at ae 38 skin laxity on lower face and submandibular area during childhood but not noticeable in adulthood single palmar crease bilateral limited ability to supinate forearms inguinal hernia

      II.3: died at age 26 of aortic dissection, no skin laxity

      I.1, III.1: mildly dilated aortic root, mild aortic insufficiency, cutis laxa (face, submandibular, trunk, extremities) III.1: overall normal pulmonary function, prolonged wound healing I.1: inguinal hernia III.1: 12 year old male

      VariantInfo: Direct sequence analysis of ELN in CL‐16, III.1 uncovered a 25 bp deletion in exon 30, 2114_2138del. This defect was present in all affected members of the family available for testing, including I.1 and II.2. The mutation was not found in II.1. CAID: CA322210

      Family CL-13: Singaporean girl of chinese decent with no family history of cutis laxa.

      MonDO: MONDO:0008504

      Case: CL-13, II.1: 6 year old Asian female, Singaporean of Chinese decent with de novo variant.

      DiseaseAssertion: Cutis Laxa

      FamilyInfo: Parents do not harbor variant and are asymptomatic. No family history of cutis laxa.

      CasePresentingHPOs: HP:0000973, HP:0001582, HP:0008070, HP:0040080, HP:0000343, HP:0005280, HP:0002616 (Cutis laxa, Redundant skin, Sparse hair, Anteverted ears, Depressed nasal bridge, Aortic root aneurysm)

      CaseHPOFreeText: tear shaped eyes

      CaseNOTHPOs: HP:0001659 (Aortic regurgitation)

      CasePreviousTesting: At the age of 5 years 9 months an echocardiogram showed significant dilatation of the aortic root at the level of the sinuses of Valsalva with a measured diameter of 2.47 cm (normal <2.2 cm for her body surface area).

      GenotypingMethod: DNA extracted from whole blood was amplified using PCR for each exon of ELN gene. Amplified products were sequenced bidirectionally using Sanger sequencing. A panel of 121 normal control individuals was genotyped for mutations 2114_2138del and 2159delC using denaturing high performance liquid chromatography.

      Variant: ELN:c.2159delC, in exon30 ClinVarID: 16736 CAID: CA2580077344 gnomAD: Not found in gnomAD v.4.1

    1. Patient historyWe present a Polish female patient current age 10 years, born at term by natural delivery at the 39th week of the mother’s first pregnancy. Parents were healthy, non-consanguineous, Caucasian in origin. At the time of birth, the mother was 29 years old; the father was 33 years old.Family history was negative for individuals with neurodevelopmental disorders. Patient birth body parameters were the following: body weight: 3380 g (50 pc); body length: 54 cm (<95 pc); occipital frontal circumference: 31 cm (<3 pc). Apgar scores were 10 points at 1 and 5 min of life.Presented girl displayed normal, uneventful postnatal adaptation and development from birth to 5 months of life.At 22 weeks, directly after third dose-vaccination with DTaP (Infanrix-Hexa), motor and cognitive regression, deterioration of eye contact, and the lack of a smile were noticed. Consequently, further vaccinations were suspended. At the age of 18 months, further developmental regression became apparent. She was intensively rehabilitated, but no progress was observed. In clinical evaluation, she could not stand up or walk independently and she could pronounce a few simple syllables and try to combine them into words. Detailed clinical observations from 1.5 to 10 years of age are described in supplementary data.At the age of 10 years, she had not acquired the ability to walk; cognitive development remains at a low level. Summary of neurological examinations showed global developmental delay, tetraparesis with hypotonia and symmetrical tendon reflexes, limited eye contact, postural defects including a “rounded” back, protruding shoulder blades, and funnel-shaped chest (Fig. ​(Fig.1aIII–IV).1aIII–IV). Phenotypic evaluation of the face revealed slight ptosis, a tendency to open the mouth and tilt the head back, without other specific features of dysmorphism (Fig. ​(Fig.11aI).Open in a separate windowFig. 1a Photographic documentation of the patient at age 10 years old. b COQ5 cDNA gel electrophoresis. c Graphical representation of the splicing products of the COQ5 gene in a patient, her parents, and healthy control. For more details, please see supplementary dataExploratory assaysMagnetic resonance imaging (MRI) of the brain at the age of 8 years revealed clear cortico-subcortical atrophy of the cerebellum–enlargement of the 4th ventricle and widening of cerebellar sulci (Supp.Fig.1a-d, arrows) as compared to the normal appearance in a healthy individual (Supp.Fig.1e-h, arrows). The cerebellar sulci were wider in our patient at age 8 years than at 18 months, as well as in comparison to an age-matched healthy control. This indicates progressive atrophy of cerebellar tissue. Atrophy involved both vermis and cerebellar hemispheres. The supratentorial structures are normal. Echocardiogram, abdominal ultrasonography, and ophthalmologic investigation were also uneventful.

      Case: Dawidziuk Proband, female, Polish, Caucasian, 10yo at report, onset at 22wks

      CasePresentingHPOs: HP:0033044, HP:0034332, HP:0000817, HP:0002540, HP:0001263, HP:0002273, HP:0001252, HP:0000508, HP:0001272, HP:0002470, HP:0001298, HP:0004322, HP:0001344, HP:0100710, HP:5200044, HP:0000252, HP:0002061, HP:0000767

      CasePresentingHPOsFreeText: lack of smile, “rounded” back, protruding shoulder blades, tendency to open the mouth and tilt the head back, cortico-subcortical atrophy of the cerebellum on MRI, enlargement of the 4th ventricle and widening of cerebellar sulci. Low COQ10 level tests showing 0.6 mg/l (normal range >0.67 mg/l); after 2-month treatment: 0.7 mg/l

      Cardiac echocardiogram, complete blood count, electrolyte levels, CPK, liver and renal function tests, carnitine and acyl-carnitine, copper, thyroid function tests, lactate, blood amino acid profile, homocysteine, as well as urine for protein and organic acids, were within normal limits.

      CaseNOTHPOs: HP:0025190, HP:0010865, HP:0001336, HP:0001250, HP:0000639, HP:0000514, HP:0000570, HP:0000657, HP:0001310, HP:0002174, HP:0002080, HP:0002353,

      CaseNOTHPOSFreeText: family history of neurodevelopmental disorders. The supratentorial structures are normal. Echocardiogram, abdominal ultrasonography, and ophthalmologic investigation were also uneventful. Encephalomyopathy

      CasePreviousTesting: The aCGH analysis did not show any pathogenic copy number variations. Genetic panel excluded congenital Rett, Rett-like and Angelman's syndromes, microdeletion / microduplication syndromes and genetically based lysosomal diseases

      CaseGenotypingMethod: Exome sequencing, Sanger sequencing of parents to confirm biallelic origin

      Variant: c.681+1G>A; c.352G>A (p.Gly118Ser) confirmed in trans

      ClinVarID: or CAID: CA386577420; CA244466459

      gnomAD: The splice-site variant, c.681+1G>A in exon /7, is present in gnomAD v4.1.0 with a MAF=0.00002229 (1/44868 alleles) in the East Asian population and 0 homozygotes. The missense variant, p.Gly118Ser, is present in gnomAD v4.1.0 with a MAF=0.0001650 (1/6062 alleles) in the Middle Eastern population and 0 homozygotes.

      AddCaseInfo: healthy, non-consanguineous parents

      PreviouslyPublished: n/a

      VariantEvidence: COQ5 mRNA (Supp.Fig.3) showed that its level is markedly diminished

    1. FSIP2_4

      CaseFSIP2_4 male, 43yo report, Tunisian

      CasePresentingHPOs HP:0003251, HP:0012207, HP:0012868

      (male infertility, asthenospermia, sperm tail anomaly)

      HPOsFreeText Sperm volume: 1.7mL, sperm concentration: 49.5 million/mL, total motility: 5h, vitality: 52%, normal spermatozoa: 0%, absent flagella: 6%, short flagella: 70%, coiled flagella: 14%, flagella of irregular caliber: 80%

      CaseNotHPOs n/a

      CasePreviousTesting Previous genetic analysis of DNAH1, CFAP43, and CFAP44 did not end in diagnosis. "Normal somatic karyotypes 46,XY and were negative for Y chromosome microdeletions."

      Variant NM_173651.3(FSIP2):c.16393_16396del (p.Asn5465Glufs)

      ClinVar 586971

      gnomAD not in gnomAD

      CaseAddInfo Consanguineous parents

      CasePMIDs 29449551

    1. Table 4Variants associated with a clinical phenotype in ≥5 homozygous subjects

      Variant 1. NM_000512.5:c.901G>T 2. NM_000512.5:c.1156C>T 3. NM_000512.5:c.120+1G>A 4. NM_000512.5:c.346G>A 5. NM_000512.5:c.1171A>G 6. NM_000512.5:c.860C>T 7. NM_000512.5:c.139G>A 8. NM_000512.5:c.280C>T 9. NM_000512.5:c.1019G>A 10. NM_000512.5:c.1168del

      Italics highlight common variants with table 2

    1. In this study we report the first development of a denaturating high performance liquid chromatography (dHPLC) protocol for the rapid and accurate detection of recently described mutations in the IDUA gene. Optimal PCR running and dHPLC partial denaturing conditions for mutation detection were established for each PCR amplicon corresponding to 14 IDUA exons and their adjacent intronic/flanking sequences. Results: A total of 12 different mutations, 5 nonsense, 4 missense, 1 deletion, and 2 splice site (intron), in 10 MPS I patients were screened. All mutations revealed a distinct dHPLC pattern thus enabling their accurate detection.

      This proband was "described and recently published by Vazna et al." (PMID: 19396826). Patient is compound heterozygous for c.1882C>T (p.Arg628Ter) and c.208C>T (p.Gln70Ter) (P based on classification by the ClinGen Lysosomal Diseases VCEP); phase confirmed in trans. PM3=0 points

    1. OA-16c.1635C>Gp.S545R333.71.0-5.020/117020/200 - HM

      Case#: Pedigree OA-16, North of England

      DiseaseAssertion: optic atrophy

      FamilyInfo: 2 additional affected individuals

      CasePresentingHPOs: HP:0000648

      CaseHPOFreeText: Snellen BCVA 20/200 - hand movement, mean age of onset= 3.7yrs

      CaseNotHPOs:

      CaseNotHPOFreeText:

      PreviouslyPublished: Cautious that they may overlap with the individuals from Hudson et al since both are from England, but the author notes that they "checked against the eOPA1 database (http://lbbma.univ-angers.fr/eOPA1/, Accessed 10-12-09) to determine whether they had been described in previous mutational reports."

      GenotypingMethod: The entire coding region of the OPA1 and OPA3 genes was amplified by PCR and sequenced. Variants were confirmed by reverse sequencing.

      Variant: c.1635C>G; p.S545R

      ClinVar: 30461

      CAID: CA10575554

      SupplementalData:

    1. siblings

      FamilyLabel R07-429

      Family#PresentingHPOs HP:0001263, HP:0003072, HP:0003015, HP:0003300, HP:0000978, HP:0002099, HP:0003193, HP:0002721, HP:0002007, HP:0000316, HP:0000218, HP:0000767, HP:0008905, HP:0003027, HP:0002987, HP:0003049, HP:0001156, HP:0004209, HP:0006380, HP:0006460, HP:0002694, HP:0005930, HP:0011844, HP:0008788, HP:0003155, HP:0002850

      (GDD, Hypercalcemia, Flared metaphyses, Ovoid vertebral bodies, Easy bruising, Asthma, Allergic rhinitis, Immunodeficiency, Frontal bossing, Hypertelorism, High arched palate, Pectus excavatum, Rhizomelia, Mesomelia, Contractures of elbows, Ulnar deviation of the wrist, Brachydactyly, Fifth finger clinodactyly, Knee contractures, Increased laxity of ankles, Sclerosis of skull base, Epiphyseal abnormality, Abnormal appendicular skeleton morphology, Delayed pubic bone ossification, elevated alkaline phosphatase, decreased IgM)

      HPOsFreeText Born at term, significant developmental delay/special education, abnormal brain MRI, severe unclassified immunodeficiency, normal PTH concentration, mild hypercalcemia. Radiographic findings: widened/flared metaphyses with irregular ossification, moth-eaten long bones, fragmentation of the proximal metacarpals, and a distinctive transverse gap seen in the tibias. From table: eczema or atrophoderma, wheel chair bound-unable to bear weight on lower extremities, flattened supraorbital ridges, normal formed and positioned ears, mild pectus excavatum, Mesomelia with significant anterior bowing in the upper and lower extremities, Ulnar deviation at the wrists with laxity, telescoping fingers, Mild knee contractures, Significant laxity at the ankles with positional equinovarus, 2-3 syndactyly, Delayed ossification of the fontanel, Delayed ossification of the basal occipital bone, Delayed ossification of the posterior elements of the spine, Significant metaphyseal irregularities, Epiphyseal delay with irregular epiphyses, Subjectively large distance from the epiphyses to the metaphyseal edge, Ossification defect or gaps in the appendicular skeleton, Brachydactyly with metaphyseal irregularities and epiphyseal delay, IgE <1 (normal <20 IU/ml), CD3 T-lymphocytes 82% (normal 60-76%), Parathyroid hormone intact 19 (normal 11-51 pg/ml). Radiograph additionally showed widened/flared metaphyses with irregular ossifications and irregular ossification front, brachydactyly with irregular metacarpal and phalangeal metaphyses and delayed epiphyseal ossification, absence of pubic bone ossification, and delayed ossification of the basal occipital bone and subjectively increased density of the skull.

      FamilyNotHPOs n/a

      NotHPOsFreeText fixed equinovarus, walked with or without assistance

      CountryOrigin n/a

      Ethnicity n/a

      Race n/a

      Family#PreviousTesting PTH1R coding exons sequenced due to phenotype overlap with JMC. No variants identified.

      ProbandLabel R07-429A

      Variant NM_025164.4(SIK3):c.559C>T (p.Arg187Cys)

      ClinVar 587366

      gnomAD not in gnomAD

      FamilyAddInfo consanguineous

      FamilyPMIDs n/a