1,620 Matching Annotations
  1. Oct 2026
    1. There is little information about MPS I-related complications during laronidase therapy. We describe the first autopsy report of a young male MPS I patient who died of infection-induced cardiopulmonary failure following 2 years of weekly treatment with laronidase.

      Annotating here since the article is a PDF.

      Case#: Lin ERT Proband, 3yo at dx, male, Taiwan

      DiseaseAssertion: MPS1 H/S

      FamilyInfo:

      CasePresentingHPOs: HP:0002094, HP:0030828, HP:0002870, HP:0001640, HP:0001712, HP:0005133, HP:0001654, HP:0005145, HP:0008155, HP:0002653, HP:0002829, HP:0001376, HP:0002751, HP:0004348, HP:0007957, HP:0007663, HP:0002167, HP:0032341, HP:0410042

      CaseHPOFreeText: Positive urine MPS screening test, blood IDUA activity=0.4 umol/h per mg protein (normal range 10-35). ERT improved cardiopulmonary status, joint range of motion, mobility, bone and joint pain, kyphoscoliosis, bone mineral density, sleep quality, corneal clouding and visual acuity, speech fluency, forced vital capacity and liver size, and resulted in 80.2% reduction in urinary GAG excretion. Cardiopulmonary failure

      CaseNotHPOs:

      CaseNotHPOFreeText:

      PreviouslyPublished: n/a

      Variant: T364M homozygous

      ClinVar: 11925

      CAID: CA256126

      SupplementalData: n/a

    1. c.6879 T

      Case#: ATM02_V-3

      Demographics: Male, 18 yrs at report

      CasePresentingHPOs: HP:0000752, HP:0001581

      CaseNotHPOs:

      CasePreviousTesting:

      CaseMethod1:

      CaseMethod2:

      CaseGenotypingMethod:

      Variant: NM_017890.4:c.6879delT

      ClinVar:

      CAID: CA4824093

      gnomAD:

      VariantEvidence: This variant has been reported in two apparently unrelated families of common ethnicity, and therefore likely founder mutation. Hence, the score is reduced from default.

      CaseAddInfo:

      CasePMIDs:

    1. HII-2

      Case: Family H Proband HII-2, female, 50yo at report

      CasePresentingHPOs: HP:0000823, HP:0002240, HP:0001822, HP:0034373, HP:0100490, HP:0002619, HP:0000520, HP:0001838, HP:0007380, HP:0001084, HP:0001871, HP:0004322, HP:0000135, HP:0000141, HP:0012410, HP:0011974

      CasePresentingHPOsFreeText: stasis ulcers

      CaseNOTHPOs: HP:0000953, HP:0000998, HP:0030053, HP:0001256

      CaseNOTHPOSFreeText: dilated lateral scleral vasculature

      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, 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 parents, not genotyped. 3 unaffected, not genotyped siblings

      PreviouslyPublished: n/a

      VariantEvidence: Functional characterization of G437R in Xenopus oocytes showed that transport activity was approximately half of WT SLC29A3. Studies in NIH 3T3 fibroblasts demonstrated accelerated turnover of the G437R mutant compared to WT, suggesting decreased stability (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 C Proband CII-2, male, Arabic, Israeli, 32yo at report

      CasePresentingHPOs: HP:0000953, HP:0030053, HP:0000998, HP:0008064, HP:0001433, HP:0001634, HP:0001935, HP:0033211, HP:0003565, HP:0000027, HP:0100324, HP:0002716, HP:0100727, HP:0001084

      CasePresentingHPOsFreeText: scrotal masses, Testicular ultrasound examination done in patient C2 revealed echogenic thickening of both the spermatic cords and the scrotal sac, normal-sized testes with a few microcalcifications; extreme infiltration of the subcutis in the lower abdominal wall and thighs was noted in patient C2 by computed tomography scan; nonspecific inflammatory infiltrates in the portal spaces on liver biopsy; nonspecific pathological deviations on bone marrow biopsy

      CaseNOTHPOs: HP:0000054, HP:0002619, HP:0000365, HP:0000520, HP:0012385, HP:0007380

      CaseNOTHPOSFreeText: dilated scleral vessels

      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 parents. brother (CII-4) is also genotype/phenotype +

      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.

    3. 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 D Proband DII-2, male, Arabic, Israeli, 33yo at report

      CasePresentingHPOs: HP:0000953, HP:0030053, HP:0000998, HP:0008064, HP:0000054, HP:0000771, HP:0001433, HP:0002619, HP:0001684, HP:0001634, HP:0000365, HP:0000520, HP:0007380, HP:0001935, HP:0003565, HP:0008734, HP:0000027, HP:0002716, HP:0100727, HP:0100324

      CasePresentingHPOsFreeText: scrotal masses, thickened scrotal sac, retracted penis, nonspecific inflammatory infiltrates in the portal spaces on liver biopsy

      CaseNOTHPOs: HP:0012385

      CaseNOTHPOSFreeText: Dilated scleral vessels

      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 parents. brothers (DII-5 and DII-7) are also genotype/phenotype +. brothers (DII-8, DII-9, and DII-11) are het and unaffected. brother DII-10 was affected but deceased so no genotype recorded

      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. P6

      CaseP6 male, 28yo report, Tunisia

      CasePresentingHPOs HP:0012207, HP:0003251

      (reduced sperm motility, male infertility)

      HPOsFreeText Patient's sperm volume: 3mL(lower reference limit: 1.5), sperm concentration: 7.8million/mL(reference: 15), total motility after 1hr: 5%(reference: 40), normal spermatozoa: 0%(reference: 4).

      CaseNotHPOs n/a

      CasePreviousTesting Previously screened all patients for DNAH1, CFAP43, and CFAP44 variants. Somatic karyotypes were normal.

      Variant NM_144668.5:c.3007_3337del

      ClinVar 586974

      gnomAD not in gnomAD

      CaseAddInfo consanguinity

      CasePMIDs 29449551

    2. P5

      CaseP5 male, 31yo report, Tunisia

      CasePresentingHPOs HP:0012207, HP:0012865, HP:0012868, HP:0003251

      (reduced sperm motility, sperm head anomaly, sperm tail anomaly, male infertility)

      HPOsFreeText Patient's sperm volume: 3.4mL(lower reference limit: 1.5), sperm concentration: 60million/mL(reference: 15), total motility after 1hr: 5%(reference: 40), vitality: 62%(reference:53%), normal spermatozoa: 0%(reference: 4), abnormal acrosome: 80%, abnormal head morphology: 8%, abnormal base: 2%, absent flagella: 24%, short flagella: 50%, coiled flagella: 8%, flagella of irregular caliber: 68%, multiple anomalies index: 2.5%.

      CaseNotHPOs n/a

      CasePreviousTesting Previously screened all patients for DNAH1, CFAP43, and CFAP44 variants. Somatic karyotypes were normal.

      Variant NM_144668.5:c.3007_3337del

      ClinVar 586974

      gnomAD not in gnomAD

      CaseAddInfo nonconsanguineous

      CasePMIDs 29449551

    3. P4

      CaseP4 male, 45yo report, Tunisia

      CasePresentingHPOs HP:0012207, HP:0012865, HP:0012868, HP:0003251

      (reduced sperm motility, sperm head anomaly, sperm tail anomaly, male infertility)

      HPOsFreeText Patient's sperm volume: 2.2mL(lower reference limit: 1.5), sperm concentration: 56million/mL(reference: 15), total motility after 1hr: 0%(reference: 40), vitality: 79%(reference:53%), normal spermatozoa: 0%(reference: 4), abnormal acrosome: 78%, abnormal head morphology: 58%, abnormal base: 14%, absent flagella: 50%, short flagella: 32%, coiled flagella: 34%, flagella of irregular caliber: 50%, multiple anomalies index: 3.4%.

      CaseNotHPOs n/a

      CasePreviousTesting Previously screened all patients for DNAH1, CFAP43, and CFAP44 variants. Somatic karyotypes were normal.

      Variant NM_144668.5:c.3007_3337del

      ClinVar 586974

      gnomAD not in gnomaD

      CaseAddInfo consanguinity

      CasePMIDs 29449551

    4. P3

      CaseP3 male, 51yo report, Tunisia

      CasePresentingHPOs HP:0012207, HP:0012865, HP:0012868, HP:0003251

      (reduced sperm motility, sperm head anomaly, sperm tail anomaly, male infertility)

      HPOsFreeText Patient's sperm volume: 1.7mL(lower reference limit: 1.5), sperm concentration: 56million/mL(reference: 15), total motility after 1hr: 5%(reference: 40), vitality: 73%(reference:53%), normal spermatozoa: 0%(reference: 4), abnormal acrosome: 56%, abnormal head morphology: 20%, abnormal base: 32%, absent flagella: 22%, short flagella: 59%, coiled flagella: 27%, flagella of irregular caliber: 37%, multiple anomalies index: 2.7%.

      CaseNotHPOs n/a

      CasePreviousTesting Previously screened all patients for DNAH1, CFAP43, and CFAP44 variants. Somatic karyotypes were normal.

      Variant NM_144668.5:c.3007_3337del

      ClinVar 586974

      gnomAD not in gnomAD

      CaseAddInfo consanguinity

      CasePMIDs 29449551

    5. P2

      CaseP2 male, 54yo report, Tunisia

      CasePresentingHPOs HP:0012207, HP:0012865, HP:0012868, HP:0003251

      (reduced sperm motility, sperm head anomaly, sperm tail anomaly, male infertility)

      HPOsFreeText Patient's sperm volume: 1.8mL(lower reference limit: 1.5), sperm concentration: 6million/mL(reference: 15), total motility after 1hr: 1%(reference: 40), vitality: 80%(reference:53%), normal spermatozoa: 0%(reference: 4), abnormal acrosome: 56%, abnormal head morphology: 10%, abnormal base: 2%, absent flagella: 6%, short flagella: 32%, coiled flagella: 17%, flagella of irregular caliber: 68%, multiple anomalies index: 2.3%.

      CaseNotHPOs n/a

      CasePreviousTesting Previously screened all patients for DNAH1, CFAP43, and CFAP44 variants. Somatic karyotypes were normal.

      Variant NM_144668.5:c.3007_3337del

      ClinVar 586974

      gnomAD n/a

      CaseAddInfo consanguinity

      CasePMIDs 29449551

    1. On gene analysis thereafter, two missense mutations were verified in exons 3 and 11 of transmembrane protein 43 (TMEM43) in this patient and her mother (Fig. 3). The mutations were c. 265 g > a, p.V89M and c.896 g > c, p.R299T.

      Case# HondaF, female, newborn

      CasePresentingHPOs HP:0001640, HP:0006682, HP:0011713, HP:0100572

      CaseGenotypingMethod "gene analysis"

      Variant NC_000003.10:g.14147425G>A

      CAID CA052413

      gnomAD 0.001044 link

      CaseAddInfo 2 mutations in cis from mom, phenotypes described at birth (usually adult onset)

    1. 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 C/Prendiville Patient 2, Lebanese-Australian, 11yo at report

      Not scoring this proband since this variant has been reported many times already and parents are consanguineous, from Lebanon which is near many of the other cases

    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 B/Prendiville Patient 3, Lebanese-Australian, 11yo at report

      CasePresentingHPOs: HP:0000343, HP:0030084, HP:0001953, HP:0100651, HP:0003237, HP:0030166, HP:0003326, HP:0002829, HP:0002315, HP:0002027, HP:0000998, HP:0000520, HP:0001433, HP:0002594, HP:0002171, HP:0100578, HP:0001999, HP:0100534, HP:0001763, HP:0003565

      CasePresentingHPOsFreeText: Inflammatory symptoms. Decreased IgM. Onset of hyperpigmentation at 2-3mo; located on upper thigh and scrotum. Right frontal lobe gliosis. Lipoatrophy of lower legs.

      CaseNOTHPOs: HP:0004322, HP:0001738, HP:0002926

      CaseNOTHPOSFreeText: Autoantibodies to pancreatic islet cells.

      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: c.940del (p.Tyr314fs) "c.940delT"

      ClinVarID: or CAID: CA351489

      gnomAD: This frameshift variant, Tyr314fs, is absent from gnomAD v4.0.0 and occurs in exon 6/6. Downscoring since NMD is not expected to occur.

      AddCaseInfo: first-cousin parents

      PreviouslyPublished: 17461801

      VariantEvidence: Functional in Xenopus oocytes demonstrated transport activity that was approximately one-fourth that of WT SLC29A3. Studies in NIH 3T3 fibroblasts showed mistrafficking of the mutant protein to the ER or Gogli apparatus (Kang et al. 2010; PMID: 20595384).

    1. The proband had first presented aged 14 years

      Case# II-4, Female, 14, Ireland

      CasePresentingHPOs HP:0002506, HP:0002497, HP:0002061, HP:0011448, HP:0001347

      CasePreviousTesting Initial genetic testing (with patient consent) included a screening panel for HSP, as well as SCA 1, 2, 3 and 6, all of which were negative.

      CaseMethod1 WES

      Variant NM_005186.3:c.1534C>T(p.Arg512Cys)

      CAID CA6093457

      gnomAD 0.000008977

    1. One of these subjects, a female, was shown to be heterozygous for the previously described apoB-100 R3500Q mutation [[2], [19]].

      Case# Patient 5, Caucasian, Female, age 61

      CasePreviousTesting Screened for prevalent European mutations in apoB with DGGE.

      CasePresenting HPOs HP:0005145 Narrowing of Coronary Artery and HP:0003124 Hypercholesterolemia

      CaseNotHPOs n/a

      CaseGenotypingMethod PCR fraction of exom 26, denaturing gradiant gel electrophoresis

      Variant NM_000384.2(APOB):c.10580G>A (p.Arg3527Gln)

      ClinVar 17890

      gnomAD 0.0005791 gnomaD

      VariantEvidence high LDL-cholesterol levels(mg/dl) P5=240, PMID: 3477815- reduced LDLR affinity

      CaseAddInfo significantly lower fractional catabolic rate/production rate according to pending model

    1. patient with congenital-onset pure spastic paraplegia caused by novel pathogenic variants in CAPN1

      Case# Travaglini 1, Male, 16 report, Italian

      CasePresentingHPOs HP:0006895, HP:0040083, HP:0001347, HP:0003487

      CasePreviousTesting Sanger of SPG4 and 89 other known/candid genes by Nextera Custom Enrichment panel

      CaseMethod1 Sanger Sequencing

      CaseGenotypingMethod CAPN1 variants found in same panel screen

      Variant NM_005186.3:c.221G>A (p.G74D), NM_005186.3:c.911C>T(p.T304M), NM_005186.3:c.1418G>T (p.R473L)

      CAID CA6092976, CA6093221, CA6093432

      gnomAD 0.0006904 , 0.0003415, 0.00003952

      CaseAddInfo nonconsanguineous family

    1. Indeed, in contrast to fibroblasts bearing the I382M mutation, which displayed mild mitochondrial network fragmentation, fibroblasts with the p.R445H and p.S545R mutations were marked by the disappearance of filamentous mitochondria in favour of fragmented and punctuated mitochondria (patients 1–3) (Fig. ​(Fig.2B2B and Fig. S1). Quantification of the ratio of mitochondrial to cellular volume showed a 20% decrease of mitochondrial content in fibroblasts with the dominant‐negative p.R445H and p.S545R mutations (patients 1–3), compared to control fibroblasts, whereas no significant loss of mitochondrial volume was observed in the haploinsufficient OPA1 mutated fibroblasts (patients 4–7) (Fig. ​(Fig.2C).2C).

      Cultured patient fibroblasts showed disappearance of filamentous mitochondria in favor of fragmented and punctuated mitochondria and a 20% decrease of mitochondrial content in fibroblasts.

    1. 3

      Case3: Male, 41 yrs report

      CasePresentingHPOs: HP:0012432, HP:0003738, HP:0003236, HP:0003273, HP:0003044, HP:0012785, HP:0006466, HP:0005997, HP:0003798, HP:0100295, HP:0031237, HP:0003201, HP:0012548 (Chronic fatigue, Exercise-induced myalgia, Elevated serum creatine phosphokinase, Hip contracture, Shoulder flexion contracture, Flexion contracture of finger, Ankle contracture, Neck flexion contracture, Nemaline bodies, Muscle fiber atrophy, Internally nucleated skeletal muscle fibers, Rhabdomyolysis, Skeletal muscle fatty infiltration)

      HPOsFreeText: Jaw contractures, Core-like regions

      CaseNotHPOs: HP:0001627 (Cardiac abnormality)

      NotHPOsFreeText: N/A

      CaseAddInfo: Variant is confirmed de novo via parental testing

      CasePreviousTesting: ACTA1 and TPM3 were sequenced and returned negative.

      CaseGenotypingMethod: The TPM2 gene was sequenced and variants identified. No other information is provided.

      Variant: NM_003289.3:c.14_16delAGA (p.Lys7del)

      ClinVar: 140486 https://www.ncbi.nlm.nih.gov/clinvar/variation/140486/

      gnomAD: Not in gnomAD

    2. 2

      Case2: Male, 14 yrs report

      CasePresentingHPOs: HP:0002355, HP:0002527, HP:0000023, HP:0001763, HP:0002942, HP:0001276, HP:0006466, HP:0003089 (Difficulty walking, Falls, Inguinal hernia, Pes planus, Thoracic kyphosis, Hypertonia, Ankle contracture, hamstring contracture)

      HPOsFreeText: In-toe gait, Tendo-Achilles release performed

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: Son of Case 1, Variant is de novo in mother

      CasePreviousTesting: N/A

      CaseGenotypingMethod: The TPM2 gene was sequenced and variants identified. No other information is provided.

      Variant: NM_003289.3:c.14_16delAGA (p.Lys7del)

      ClinVar: 140486 https://www.ncbi.nlm.nih.gov/clinvar/variation/140486/

      gnomAD: Not in gnomAD

    3. 5

      Case5: Female, 50 yrs report

      CasePresentingHPOs: HP:0002355, HP:0100753, HP:0003089, HP:0003798, HP:0031237, HP:0031318 (Difficulty walking, Schizophrenia, Hamstring contracture, Nemaline bodies, Internally nucleated skeletal muscle fibers, Myofiber disarray)

      HPOsFreeText: Jaw contractures, Pectoral contractures, Ankle dorsiflexor contractures, Quad contractures, Increased oxidative staining

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: Daughter of Case 4, Sibling of Case 6

      CasePreviousTesting: N/A

      CaseGenotypingMethod: The TPM2 gene was sequenced and variants identified. No other information is provided.

      Variant: NM_003289.3:c.14_16delAGA (p.Lys7del)

      ClinVar: 140486 https://www.ncbi.nlm.nih.gov/clinvar/variation/140486/

      gnomAD: Not in gnomAD

    4. 8

      Case8: Female, 65 yrs report

      CasePresentingHPOs: HP:0001263, HP:0030051, HP:0003326, HP:0003731, HP:0002540, HP:0003236, HP:0006466, HP:0005830, HP:0012785, HP:0009600, HP:0003798, HP:0031237, HP:0003555, HP:0001761 (Delayed milestones, Tip-toe gait, Myalgia, Quadriceps weakness, Non-ambulatory, Elevated serum creatine phosphokinase, Ankle contracture, Toe contractures, Flexion contracture of finger, Contracture of thumb, Nemaline bodies, Internally nucleated skeletal muscle fibers, Muscle fiber splitting, Pes cavus)

      HPOsFreeText: Tendo-achilles release performed, NCPAP from 54 yrs, Jaw contractures, Nuclei clumps, Fiber type grouping, Required non-invasive nocturnal ventilatory support at age 54 years

      CaseNotHPOs: HP:0001627 (Cardiac abnormality)

      NotHPOsFreeText: N/A

      CaseAddInfo: Parental testing not performed

      CasePreviousTesting: ACTA1 was sequenced and returned negative.

      CaseGenotypingMethod: The TPM2 gene was sequenced and variants identified. No other information is provided.

      Variant: NM_003289.3:c.14_16delAGA (p.Lys7del)

      ClinVar: 140486 https://www.ncbi.nlm.nih.gov/clinvar/variation/140486/

      gnomAD: Not in gnomAD

    5. 1

      Case1: Female, 45 yrs report

      CasePresentingHPOs: HP:0008994, HP:0002015, HP:0003236, HP:0003273, HP:0031237, HP:0003555, HP:0100295, HP:0012548 (Proximal muscle weakness in lower limbs, Dysphagia, Elevated serum creatine phosphokinase, Hip contracture, Internally nucleated skeletal muscle fibers, Fiber splitting, Muscle fiber atrophy, Skeletal muscle fatty infiltration)

      HPOsFreeText: N/A

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: Proband of Family 1, Mother of Case 2, Variant is de novo

      CasePreviousTesting: N/A

      CaseGenotypingMethod: The TPM2 gene was sequenced and variants identified. No other information is provided.

      Variant: NM_003289.3:c.14_16delAGA (p.Lys7del)

      ClinVar: 140486 https://www.ncbi.nlm.nih.gov/clinvar/variation/140486/

      gnomAD: Not in gnomAD

    1. two participants who underwent sequencing (Participants II.4 and II.5)

      Case#: II.4 - male, 23, European descent II.5 - male, 28, European descent CasePresentingHPOs: Both patients II.4 and II.5 - HP:0003233 (low HDL cholesterol), HP:0012153 (hypotriglyceridemia), HP:0003563(decreased LDL cholesterol)

      CaseMethod1: Exome CaseMethod2: Sanger

      Variant: NM_014495.3(ANGPTL3):c.385G>T (p.Glu129Ter) and NM_014495.3(ANGPTL3):c.50_51delCCinsGA (p.Ser17Ter)

      ClinVar: 18439 (p.Ser17Ter), 18440 (p.Glu129Ter), for both variants - 1 assertion for pathogenic based on OMIM but no assertion criteria provided

      gnomAD: not in gnomAD

      VariantEvidence: 12 other individuals from the Dallas Heart Study with ANGPTL3 frameshift mutations with phenotypes in Supplementary doc (PMID 19075393), additive dosage model with 2 mutations, 1 mutation and 0 (in supplementary table 5), “key enzymes in the metabolism of circulating triglycerides and HDL cholesterol, respectively, are elevated in Angptl3-knockout mice, suggesting that increased activity of these enzymes may explain the low levels of triglycerides and HDL cholesterol in humans with ANGPTL3 nonsense mutations” (PMIDs 17110602, 12097324, and 17681148)

    1. 4

      Case4: Male, Spain, Post-birth onset

      CasePresentingHPOs: HP:0003798, HP:0001324, HP:0000297, HP:0003701, HP:0001252, HP:0001284, HP:0002307, HP:0000218, HP:0001382 (Nemaline bodies, Muscle weakness, Facial hypotonia, Proximal muscle weakness, Muscular hypotonia, Areflexia, Drooling, High palate, Joint hypermobility)

      HPOsFreeText: Cephalic support, Sedestation

      CaseNotHPOs: HP:0000602, HP:0001249, HP:0001627, HP:0002093, HP:0002307, HP:0003722, HP:0002460, HP:0001283, HP:0002650, HP:0002540, HP:0006466, HP:0011471 (Ophthalmoplegia, Intellectual disability, cardiac abnormality, Ankle contracture, Drooling, Neck flexor weakness, Distal muscle weakness, Bulbar palsy, Respiratory insufficiency, Inability to walk, Scoliosis, PEG-fed in infancy)

      NotHPOsFreeText: Bimodal communication, Wheelchair dependence, Mechanic ventilation

      CaseAddInfo: Typical variant, Paternity/maternity was confirmed, cDNA analysis confirmed that Variant 1 results in a splice-site donor mutation which skips exon 24 which was confirmed by Sanger sequencing and leads to this deletion: p.His738_Asp770del (c.2212_2310del)

      CasePreviousTesting: N/A

      CaseGenotypingMethod: A research panel with 751 genes relating to neurological disorders, including the coding and intronic flanking regions of ACTA1, CFL2, KBTBD13, NEB, TNNT1, TNNT3, TPM2 and TPM3, was used to locate any variants in the proband. These variants were then prioritized and confirmed by Sanger sequencing in the probands and their relatives.

      Variant1: NM_001164507.1:c.2310+5G>A (p.=)

      CAID: CA913203562 http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA913203562

      gnomAD: Not in gnomAD

      Variant2: NM_001164507.1:c.17779_17780del (p.Tyr5927Hisfs*17)

      CAID: CA913203561 http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA913203561

      gnomAD: Not in gnomAD

    2. 1

      Case1: Male, Spain, Birth onset

      CasePresentingHPOs: HP:0003722, HP:0001324, HP:0000297, HP:0003701, HP:0001252, HP:0001284, HP:0001283, HP:0002540, HP:0002307, HP:0000218, HP:0011471 (Nemaline bodies, Muscle weakness, Facial hypotonia, Proximal muscle weakness, Muscular hypotonia, Areflexia, Bulbar palsy, Inability to walk, Drooling, High palate, PEG-fed in infancy)

      HPOsFreeText: Bimodal communication, Wheelchair dependence, Cephalic support, Sedestation

      CaseNotHPOs: HP:0002460, HP:0000602, HP:0001249, HP:0001627, HP:0002093, HP:0002650, HP:0006466, HP:0001382, HP:0003798 (Neck flexor weakness, Distal muscle weakness, Ophthalmoplegia, Intellectual disability, cardiac abnormality, Respiratory insufficiency, Scoliosis, Ankle contracture, Joint hypermobility)

      NotHPOsFreeText: Mechanic ventilation

      CaseAddInfo: Intermediate variant, Paternity/ maternity was confirmed

      CasePreviousTesting: N/A

      CaseGenotypingMethod: A research panel with 751 genes relating to neurological disorders, including the coding and intronic flanking regions of ACTA1, CFL2, KBTBD13, NEB, TNNT1, TNNT3, TPM2 and TPM3, was used to locate any variants in the proband. These variants were then prioritized and confirmed by Sanger sequencing in the probands and their relatives.

      Variant1: NM_001164507.1:c.17779_17780del (p.Tyr5927Hisfs*17)

      CAID: CA913203561 http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA913203561

      gnomAD: Not in gnomAD

      Variant2: NM_001164507.1:c.11086A>C (p.Thr3696Pro)

      CAID: CA348785269 http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/allele?hgvsOrDescriptor=NM_001271208.2%3Ac.11086A%3EC

      gnomAD: Not in gnomAD

    1. The effects of a previously identified T364M mutation and R619G mutation on IDUA activity were examined by transfection into COS-7 cells of the IDUA cDNA construct. When compared to that of wild type cDNA, the two point mutations showed only trace amounts of IDUA activity (1.2 and 1.5% respectively, Table 2). Table 2. Expression of α- l-iduronidase in transfected COS-7 cells Transfected vector α- l-Iduronidase activity (nmol mg−1 protein−1 h−1) Total (% of wild type) pcDNA3 20.9 0.0 pcDNA3-IDUA 90.2 100.0 pcDNA3-IDUA/T364M 21.7 1.2 pcDNA3-IDUA/R619G 21.9 1.5 The activity of endogenous α- l-iduronidase in COS-7 cells was subtracted before the percentage of wild type was calculated. Efficiency of transfection was similar in all dishes by 3′ IDUA cDNA PCR amplification of transfected genomic DNA (data not shown).

      Transfection into COS-7 cells showed that this variant has 1.2% IDUA activity compared to WT

    1. FSIP2_1 

      CaseFSIP2_1 male, 44yo report, Tunisian

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

      (male infertility, asthenospermia, sperm tail anomaly)

      HPOsFreeText Sperm volume: 2.5mL, sperm concentration: 6.7 million/mL, total motility: 1h, vitality: 47%, normal spermatozoa: 0%, absent flagella: 2%, short flagella: 32%, coiled flagella: 26%, flagella of irregular caliber: 57%

      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.910del (p.Gln304Lysfs)

      ClinVar 586972

      gnomAD not in gnomAD

      CaseAddInfo Consanguineous parents

      CasePMIDs 29449551

    1. Patient 2 is a 20-year-old male, originating from a consanguineous Arab family ( Fig. 1 D). He presented with hearing loss since age 4 and cutaneous induration and hyperpigmentation of the thighs which first appeared when he was 8-year-old and gradually extended to the genitals, back and lower limbs with overlying hypertrichosis. On physical examination, short stature (128 cm) and dysmorphic facies with downslanting palpebral fissures, short nose, anteverted nares and retrognathism were seen. Additional findings included arcus senilis, scrotal masses, hepatosplenomegaly and fixed flexion contractures of the proximal interphalangeal joints of the right fourth and fifth fingers and the left fifth finger.

      Case: Mohlo-Pessach Patient 2, male, 20yo at report, Arab

      CasePresentingHPOs: HP:0000365, HP:0000953, HP:0000998, HP:0004322, HP:0001999, HP:0000494, HP:0003196, HP:0000463, HP:0001084, HP:0001433, HP:0100490, HP:0001935, HP:0003565, HP:0011227, HP:0002716, HP:0100727

      CasePresentingHPOsFreeText: Cutaneous induration and hyperpigmentation of the thighs appeared at 8yo, spread to genitals, back, and lower limbs. Retrognathism. Scrotal masses. Fixed flexion contractures of the proximal interphalangeal joints of the right fourth and fifth fingers and the left fifth finger. Skin biopsy included dermal infiltrate consisting of lymphocytes, plasma cells and CD68+ histiocytes, and dermal and subcutaneous fibrosis.

      CaseNOTHPOs:

      CaseNOTHPOSFreeText:

      CasePreviousTesting:

      CaseGenotypingMethod: SLC29A3 exons and splice junctions were PCR-amplified using intronic primers. PCR products were purified and sequenced on ABI 3700 capillary sequencer.

      Variant: c.1088G>A (p.Arg363Gln)

      ClinVarID: or CAID: CA129562

      gnomAD: This missense variant, Arg363Gln, is present in gnomAD v4.0.0 with a MAF=0.0002666 (16/60010 alleles) in the Admixed American population and 0 homozygotes.

      AddCaseInfo: consanguineous parents

      PreviouslyPublished: n/a

      VariantEvidence: n/a

    2. Screening of a large PAX6 cohort identified many novel variants and emphasises the importance of the paired and homeobox domains

      PMID: 32360764

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

      Gene: PAX6

      Disease: Ocular dysgenesis

      InheritancePattern: AD

      Notes Proband with confirmed aniridia and confirmed de novo appearance of the variant, summary in table 1, proband information in the "splice variant" section. It is noted however that the authors do not include the parental genotype or phenotype data.

      Clinical Lab The Wessex Regional Genetics Laboratory has been contacted for variants c.333C>A and c.1183G>C, there is no additional information than what is in the table and if familial or de novo is claimed it is because parental samples were collected and tested negative for the variant in the published proband

    1. marked exon 2 skipping in these assays, but also yielded a large fraction of normal transcripts.

      Cell transfection assays showed marked exon 2 skipping in these assays, but also yielded a large fraction of normal transcripts.

      c.51+3A>G mutation cosegregates with low C1 inhibitor protein levels in one family. alternative splicing of exon 3, found in peripheral blood cell mRNA but not in the liver or in hepatoma cell lines and we show that, in cultured monocytes of a patient carrying the c.51+3A>G mutation, this alternative splicing is shifted from exon 3 exclusion to skipping of both exons 2 and 3

      Variants: c.51+3A>G; c.51+5G>A

      CAIDs: CA2579981804; error in CAR-unable to register

    1. Figure 1

      MiltingF1

      FamilyNotHPOs HP:0100660, HP:0004756, HP:0001645, HP:0031317

      CountryOrigin Germany

      Ethnicity Danish

      Family#PreviousTesting: whole genome Family#Method1 PCR

      Family#GenotypingMethod Liquid Chromatography screening

      Affected 8

      Unaffected 6

      Segregations 7

      eLOD 2.1

      ProbandLabel Milting3:1 female

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

      ClinVar 734

    1. Patient TTD218UT is of Moroccan origin and was born to consanguineous parents. She was referred to the clinical geneticist at 1.5 years of age with brittle hair (low cysteine content and tiger-tail banding pattern), ichthyosis, microcephaly (−2.5 SD), psychomotor retardation, short stature (−2.5 SD) and microcytic anemia. She showed recurrent aggravation of hair-loss by tufted breakage at the scalp boundary immediately following episodes of infection-induced fever. Also upon long-term exposure to the heat of the sun, she appears to have increased hair-loss. At the age of 8 years, she shows no signs of progressive deterioration. She has a happy and friendly personality with an IQ of 54 (at 7 years of age). She has a limited physical endurance. Laboratory investigation revealed microcytic hypochromic anemia (Hb 6.5) without sequence anomalies nor deletions or duplications of the genes encoding for the alpha or beta globin chains (not shown). We performed whole genome sequencing on patient’s DNA, using the sequencing-by-ligation method from Complete Genomics (16,17). Surprisingly, we identified a homozygous variant in the GTF2E2/TFIIEβ gene, creating a missense mutation (c.C559T [p.Asp187Tyr]). This mutation is identical to one of the mutations in GTF2E2/TFIIEβ previously described by Kuschal et al. (14). Its homozygous presence was confirmed by Sanger sequencing of cDNA generated from patient’s cells and found to co-segregate with the phenotype within the family (Fig. 1A and B).

      Case: TTD218UT

      Demographics: Female, 1.5 years at diagnosis. Moroccan origin.

      CasePresentingHPOs: HP:0004779, HP:0045055, HP:0008064, HP:0000252, HP:0001263, HP:0004322, HP:0001935, HP:0004840, HP:0040082, HP:0100025

      Individual showed recurrent aggravation of hair-loss by tufted breakage at the scalp boundary immediately following episodes of infection-induced fever, and upon long-term exposure to the heat of the sun, she appears to have increased hair-loss. She had an IQ of 54 (at 7 years) and limited physical endurance.

      CaseNOTHPOs: Progressive deterioration at 8 years

      CasePreviousTesting: None

      CaseGenotypingMethod: Whole genome sequencing, confirmed by Sanger sequencing.

      Variant: NM_002095.5(GTF2E2):c.C559T [p.Asp187Tyr]

      ClinVar ID: 225841

      Pathogenic, non-LOF variant gnomAD: hypomorphic, homozygous missense. Not in gnomAD.

      AddCaseInfo: The parents of this individual were consanguineous and were heterozygous for the mutation. Of 3 siblings, two (a brother and a sister) were found to be heterozygous carriers, while one was found to have the homozygous wild type alleles (a sister).

      VariantEvidence: The variant has been previously reported by Kauschal et al (26996949) in a 16-yr old Moroccan girl. The identification of this variant in four individuals of Moroccan origin suggests the possibility of a founder mutation. Since the variant has been already scored, this proband is not being scored.

    1. Family-11COQ5c.933delCp.(Tyr311*)0.00001760Disease causingP (PVS1, PM2, PP3)–This study(GC21390)c.682-7 T > Gp.(Gln230*); p.(Leu193Phefs*27)0.001434See suppl. Table 1VUS (PM2, PM3, BP4)–This study

      Case: Family 11 GC21390 Proband II:1, 49yo at onset (incidental finding), 56yo at report

      CasePresentingHPOs:

      CasePresentingHPOsFreeText: Prolonged dark adaptation, peripheral visual field loss, BCVA= 6/9, 6/5, retinitis pigmentosa, hypertension, plasma coQ10 level=582.28nmol/L (Reference range: 227- 1432 nmol/L)

      CaseNOTHPOs:

      CaseNOTHPOSFreeText:

      CasePreviousTesting: negative IRD gene panel analysis

      CaseGenotypingMethod: genome sequencing, direct Sanger

      Variant: c.933delC p.(Tyr311); c.682-7 T > G p.(Gln230); p.(Leu193Phefs*27)

      ClinVarID: or CAID: CA6828694; CA6828747

      gnomAD: This nonsense variant, Tyr311Ter in exon 7/7, is present in gnomAD v4.1.0 with a MAF=0.00002627 (31/1179996 alleles) in the European NF population with 0 homozygotes. The score has been reduced since NMD is not expected to occur.

      This non-canonical splice site variant, c.682-7T>G, is present in gnomAD v4.1.0 with a MAF=0.001031 (66/64040 alleles) in the European Finnish population with 0 homozygotes.

      AddCaseInfo: only family member noted to be affected, mother was unaffected and heterozygous for tyr311ter but father is deceased and not genotyped

      PreviouslyPublished: n/a

      VariantEvidence: RT-PCR of patient blood derived mRNA using oligonucleotide primers targeting COQ5 (Supplementary Table 6) followed by agarose gel electrophoresis showed definite altered transcript length and mis-splicing for the COQ5 c.682-7 T > G variant. ONT sequencing of the full COQ5 transcript from whole blood of individual family 11, II:1 showed skipping of exon 5 to be the predominant effect of the c.682-7 T > G variant leading to early termination and probable nonsense-mediated decay (p.(Gln230)) (Fig. ​(Fig.4).4). In addition, exon 4–5 skipping was identified in a low proportion of reads (3%) leading to a reading-frame shift and early termination (p.(Leu193Phefs27)).

    2. Family-12COQ5c.367 C > Tp.(Arg123Trp)0.00003266Disease causingVUS (PM2, PP3)–This studyc.682-7 T > Gp.(Gln230*); p.(Leu193Phefs*27)0.001434See suppl. Table 1VUS (PM2, PM3, BP4)–This study

      Case: Family 12 Proband, 5yo at onset, 38yo at report

      CasePresentingHPOs:

      CasePresentingHPOsFreeText: Muscle weakness (hyposthenia), followed by vision problems in the dark (14), BCVA=6/18, 6/7.5, retinitis pigmentosa, nystagmus, infantile appearance, hypertelorism, undeveloped fertile function, constricted visual field

      CaseNOTHPOs:

      CaseNOTHPOSFreeText:

      CasePreviousTesting: negative IRD gene panel analysis

      CaseGenotypingMethod: "genome-wide analysis" -exome or genome sequencing

      Variant: c.367 C > T p.(Arg123Trp); c.682-7 T > G p.(Gln230); p.(Leu193Phefs27)

      ClinVarID: or CAID: CA6828832; CA6828747

      gnomAD: This non-canonical splice site variant, c.682-7T>G, is present in gnomAD v4.1.0 with a MAF=0.001031 (66/64040 alleles) in the European Finnish population with 0 homozygotes.

      This missense variant, p.Arg123Trp, is present in gnomAD v4.1.0 with a MAF=0.00002665 (2/75052 alleles) in the African/African American population and 0 homozygotes.

      AddCaseInfo: only family member noted to be affected, others do not have genotype information available

      PreviouslyPublished: n/a

      VariantEvidence:

    1. 3

      Case: Individual 3, male, 7.5 yo

      CasePresentingHPOs: HP:0000750, HP:0001263, HP:0001290, HP:0002360, HP:0007018, HP:0000736, HP:0004673, HP:0000735, HP:0000629, HP:0000316, HP:0004209, HP:0001212, HP:0001382,

      CasePResentingHPOText: Subject began walking at 18 months. Testing for autism gave the following results: WPPSI-III-NL: TIQ 98, VIQ 106, PIQ 96.

      CaseNOTHPOs: HP:0001250, HP:0002376, HP:0000202, HP:0000504,

      CasePreviousTesting: Metabolic screening, SNP-array, and Fragile X (FMR1) testing were normal

      CaseGenotypingMethod: Trio-WES. Individual is noted as being mosaic (60%) for the FBXO11 mutation. Testing also identified a VUS in TP73 (NM_0054 27.3):chr1: g.3644250 G>A, c.901G>A; p.(Asp301Asn). Not noted as de novo, so assume inherited and parents were not noted as having behavioral abnormalities or intellectual disability.

      Variant: hg19:chr2: g.4806611 8=/T>C, c.467=/A> G p.(Gln156Arg) or NM_001190274.1:c.467A>G

      CA ID: CA346813225

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

      gnomAD: n/a

      AddCaseInfo:

      VariantEvidence: Individual is noted as being mosaic (60%) for the FBXO11 mutation. Gln156 is located just 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 Q156R mutation on FBXO11 function.

    2. 9

      Case: Individual 9, male, AOR= 3 years 10 months

      CasePresentingHPOs:  HP:0004322, HP:0004325, HP:0000252, HP:0001263, HP:0001611, HP:0001256, HP:0001290, HP:0002360, HP:0000736, HP:0030213, HP:0001090, HP:0002553, HP:0000527, HP:0000494, HP:0000316, HP:0000426, HP:0000455, HP:0000322, HP:0000219, HP:0000307, HP:0000179, HP:0000400, HP:0011271, HP:0200055, HP:0009836, HP:0001212, HP:0001852, HP:0000565, HP:0000915

      CasePresentingHPOText: Began walking at 13 months, first words at 23 months. Intelligence testing should an IQ of 75-88 but noted as uneven profile.

      CaseNOTHPOs: HP:0001250, HP:0002376, HP:0000202

      CasePreviousTesting: Affymetrix Cytoscan Array screening was normal

      CaseGenotypingMethod: Individual WES (Illumina HiSeq 2500), filtering against known and candidate genes from SysID (by Konchinke et al., 2016 PMID: 26748517). Sanger sequencing for confirmation and to test the parents and show absence of the variant. The sample identity was also confirmed.

      Variant: hg19:chr2: g.4806682 1_4806682 2del, c.319_320 del, p.(Leu107Alafs45) OR* NM_001190274.1:c.319_320del

      CA ID: CA658820927

      de novo

      gnomAD: n/a

      AddCaseInfo:

      VariantEvidence: The Leu107Alafs*45 mutation causes a frameshift mutation and premature stop codon. The mutation start in exon 2 and thus removes the F-BOX, all three CASH domains and the zinc-finger UBR region, thus it should act as a loss of function variation. No functional assays or variant evidence was provided.

    1. Patients

      GroupPresentingHPOs: only shared phenotype was reduced GALNS activity in leukocytes

      GroupGenotypingMethod: Sanger seq of amplified exons

      NumberMales: 15

      NumberFemales: 6

      NumberFamilies: 19

      CountryOrigin: China

      AgeRange: 1yo to 7.8yo

      TotalNumber: 21

      FamilyInfo:19 families, siblings P1 and P2, P3 and P4, parents were studied for segregation info

      VariantCount: 15

    1. Patient 1

      Case: Patient 1, female, AOR 2 years, Turkish

      CasePresentingHPOs: HP:0001561, HP:0003265, HP:0001270, HP:0000924, HP:0000253, HP:0002007, HP:0000520, HP:0005280, HP:0003196, HP:0000463, HP:0005306, HP:0000212, HP:0000347, HP:0005619, HP:0002938, HP:0000960, HP:0009826, HP:0001156, HP:0004060, HP:0100543, HP:0008936, HP:0007340, HP:0001265, HP:0005193, HP:0002063, HP:0002240, HP:0001407, HP:0100625, HP:0004565, HP:0005619, HP:0002867, HP:0100865, HP:0003016, HP:0003416, HP:0002176, HP:0006532, HP:0000670, HP:0004315, HP:0002850,

      CaseNOTHPOs: HP:0000365, HP:0000504

      CasePreviousTesting: Lab examines including urine organic acid analysis (urine glycosaminoglycan/ GAG and lysosomal enzymes), tandem mass screening, chromosome analysis, electroencephalogram were unremarkable. Negative for mutations in SLC35D1 (Schneckenbecken dysplasia MIM 269250), and INPPL1 (opsismodysplasia; MIM 258480) .

      CaseGenotypingMethod: WES

      Variant: NM_001440.3: c.953C>T(p.P318L)

      CA ID: CA370858101

      Homozygous

      gnomAD: no homozygotes, only 2 hets in Euro-ND populatin CA370858101

      AddCaseInfo: Parents were also tested by WES and were both found to be carriers of the mutation.

      VariantEvidence: WEstern blot analysis of EXTL3 from patinet 1 cells shows expression of hte P318L variant (Figure 1B), indicating the protein is still produced. However, a glycosyltransferase assay using the wildtype EXTL3 and th eP318L variant showed reduced enzyme activity in the P318L variant compared to wildtype, and simiar levels of activity as untransfected/ mock controls. This indicates the P318L mutation acts as a loss of protein function of the enzyme activity.

    2. Patient 2

      ***Note, this patient shows overlap of several homozygous regions and alterations with PAtient 1. Althgouh they state they are unrelated, it seems evident that they may be distantly related, the Parents of Patient 2 are consanguineous and the Turkish population. Patietn 1 is Turkish, and the parents are not marked as being consanguineous.

      Case: Patient 2, female, Turkish

      CasePresentingHPOs: 

      CaseNOTHPOs:

      CasePreviousTesting: Negative for mutations in SLC35D1 (Schneckenbecken dysplasia MIM 269250), and INPPL1 (opsismodysplasia; MIM 258480).

      CaseGenotypingMethod: WES

      Variant: NM_001440.3: c.953C>T(p.P318L)

      CA ID: CA370858101

      Homozygous

      gnomAD: no homozygotes, only 2 hets in Euro-ND populatin CA370858101

      AddCaseInfo:

      VariantEvidence: WEstern blot analysis of EXTL3 from patinet 1 cells shows expression of hte P318L variant (Figure 1B), indicating the protein is still produced. However, a glycosyltransferase assay using the wildtype EXTL3 and th eP318L variant showed reduced enzyme activity in the P318L variant compared to wildtype, and simiar levels of activity as untransfected/ mock controls. This indicates the P318L mutation acts as a loss of protein function of the enzyme activity.

    1. c.934C>T (p.R312W)

      Case# Baskin RW, Female, 31

      CasePresentingHPOs HP:0004756, HP:0011841, HP:0002013

      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.934C>T (p.Arg312Trp)

      ClinVar 36873

      gnomAD 0.03553 link

    2. c.829A>T (p.T277S)

      Case# Baskin TS, Male, 16

      CasePresentingHPOs HP:0006956, HP:0100749, HP:0001962, HP:0004756

      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.829A>T (p.Thr277Ser)

      ClinVar 165456

      gnomAD 0.006432 link

    3. c.424G>A

      Case# Baskin EK, Female, 47

      CasePresentingHPOs HP:0010872, HP:0100660

      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.424G>A (p.Glu142Lys)

      ClinVar 46147

      gnomAD 0.001121 link

    4. c.1111T>C

      Case# Baskin YH, Male, 12

      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.1111T>C (p.Tyr371His)

      ClinVar 46140

      gnomAD 0.01076 link

    1. 184I.OL.0,01 leukocytes {"type":"entrez-nucleotide","attrs":{"text":"NM_000203.5","term_id":"1450641494","term_text":"NM_000203.5"}}NM_000203.5:c.[1882C>T];[1882C>T] SevereUzbek/Uzbekistan

      This variant was found in homozygosity in patient #184 from Uzbekistan. The maximum point total for homozygosity has already been reached for this variant.

    1. II:2

      Case#: Family 1- II:2, female, 49 years

      CaseHPOs: HP:0003563 (decreased LDL cholesterol)

      CaseNotHPOs: HP:0001397, HP:0000819 (liver steatosis, diabetes)

      CasePreviousTesting: TC 143 mg/dl, LDL-C 20 mg/dl, HDL-C 120 mg/dl, TG 18 mg/dl (see additional values in Table 1). ApoB100 <10 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.

      Variant: NM_000384.2:c.2533C>T (p.Gln845Ter), heterozygous

      ClinVar: N/A

      CAID: CA346011071

      gnomAD: 0.000008796 (European non-Finnish)

    2. Family I

      Family#: Family 1

      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.

      Family#Method1: Next generation sequencing

      Family#GenotypingMethod: 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 1- II:2

      Variant: NM_000384.2:c.2533C>T (p.Gln845Ter)

      ClinVar: N/A

      CAID: CA346011071

      gnomAD: 0.000008796 (European non-Finnish)

      FamilyAddInfo: Pedigree Fig 1. The two family members who did not carry the variant presented normal LDL-C levels.

    3. I:2

      Case: Family III-I:2

      CaseHPOs: HP:0003563, (decreased LDL cholesterol)

      CaseNotHPOs: HP:0000819 (Diabetes)

      CasePreviousTesting: Heterozygous (Chr2:21,230,941; c.8799 G > T; APOBp.Cys2933*) TC 145 mg/dl, LDL-C 55 mg/dl, HDL-C 81 mg/dl, TG 45 mg/dl (see additional values in Table 1). 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 and co-segregation analysis among family members.

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

      CAID: CA345993342

      AddInfo: Mother of Family III-II:2. Other daughter (II-1) also has low LDL-C, but no genetic testing results available.

    4. III:2

      Case: Family IV-III:2, 19 year old female

      CaseHPOs: HP:0003563 (decreased LDL cholesterol)

      CaseNotHPOs: HP:0000819, HP:0001397 (Diabetes, liver steatosis)

      CasePreviousTesting: TC 124 mg/dl, LDL-C 49 mg/dl, HDL-C 62 mg/dl, TG 65 mg/dl (see additional values in Table 1)

      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: Daughter of Family IV-II:1

    1. Case 16

      Case16 Female, Finland

      CasePresentingHPOs HP:0003826, HP:0000202, HP:0000347, HP:0001162, HP:0001829, HP:0010066, HP:0000157, HP:0002101, HP:0000238, HP:0007370, HP:0010664, HP:0007260

      (Stillbirth, Oral cleft, Micrognathia, Postaxial hand polydactyly, Foot polydactly, Duplicated hallux, Tongue abnormality, Defective lung lobation, Hydrocephalus, Callosal agenesis, Fused thalami, Type II lissencephaly)

      HPOsFreeText Crown-heel body length 47cm, body weight 2520g, abnormal larynx/trachea, uterus duplex, hydrocephalus/open-book, occipitotemporal hypoplasia, infratentorial hypoplasia, absent developed and identifiable mamillary bodies, absent anterior commissure, difficult to identify nucleus dentatus

      CaseNotHPOs HP:0001627

      (Congenital heart defect)

      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 stillbirth, 34+0wk gestational age

      CasePMIDs n/a

    2. Case 19

      Case19 Male, Finland

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

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

      HPOsFreeText Crown-heel body length 49cm, body weight 3864g, brain weight 286g, abnormal larynx/trachea, 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, (Fig6:) markedly narrowed basis pontis with minute corticospinal tract and a larger tg above, dysplastic dentate nucleus with irregular neuronal strands and intermingled matrix-like small cells is seen in the cerebellar hilus

      CaseNotHPOs HP:0001161, HP:0001829, HP:0001627, HP:0000157, HP:0007165

      (Hand polydactyly, Foot polydactyly, Congenital heart defect, Tongue abnormality, Periventricular neuronal heterotopia)

      NotHPOsFreeText Uterus duplex, 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 died 1 minute after birth, 40+6wk gestational age

      CasePMIDs n/a

    1. c.657C > G (p.N219K)

      Case#: 77 yo Female. French Canadian

      Demographics: French-Canadian. Parents from an isolated island Quebec, Canada.

      CasePresentingHPOs: HP:0033166, HP:0002090, HP:0200043, HP:0001875, HP:0032247, HP:0002205, HP:0006532,HP:0033005, HP:0040167, HP:0032215, HP:0003139, HP:0032155, HP:0002014, HP:0025085, HP:0001824, HP:0033431, HP:0032247, HP:0001875

      CaseFreetextHPOs: Beginning at age 14 proband was hospitalized for pneumonia. Started at age 14- 62 developed pneumonia several times. Had immunoglobulin replacement therapy. Has finger and forehead warts. Multiple episodes of Bowen's Disease of cheek. Due to worsening CMV colitis she underwent total abdominal colectomy with end ileostomy at age 77.. CMV viral load was 8641 copies/mL. IgG 11.32(g/L), IgA .28(g/L), IgM.2 (g/L). IgA and IgM are below the reference range. Neutropenia occurred only while on (val)ganciclovir for CMV.

      Person first evaluated at age 74. Colonic diseases No known consanguinity Proband was hospitalized as early as 14 years of age for pneumonia

      CasePreviousTesting: Near-absence of ICOSL in plasma. Cell surface expression of ICOSL by flow cytometry-based evaluation of PBMC from whole blood revealed severely diminished levels on CD19+ B cells.

      CaseMethod1: WES

      CaseMethod2:

      CaseGenotypingMethod: Whole exome sequencing (WES) was performed on whole blood DNA from the patient.

      Variant: NM_015259.6:c.657C > G (p.N219K)

      ClinVar: Not registered

      CAID: CA321497070

      gnomAD: 0.00006424

      VariantEvidence: Proband was homozygous for the missense variant in ICOSLG, p.N219K. Similar to the previous paper this individual is also French Canadian. No known consanguinity. p.N219K variant is reported at the highest frequency of 0.00006424 (4/62262 non Finnish European alleles in gnomAD 2.1.1.

      CaseAddInfo: Sibling of proband died of unknown cause or blood disorders

      CasePMIDs:

    1. ICOSLG (c.657C>G)

      Case#: 38 yo Male. Canadian

      Demographics: French-Canadian. Parents from an isolated island Quebec, Canada.

      CasePresentingHPOs: HP:0000246, HP:0032301, HP:0033004, HP:0002205, HP:0001875, HP:0004313, HP:0001888, HP:0000403, HP:0011108, HP:0012387, HP:0002090, HP:0200043, HP:0032215, HP:0032076, HP:0410028, HP:0100825, HP:0011107,

      CasePresentingHPOsFreeText: Had recurrent sinusitis approximately once per year as a youth. Age 21 was hospitalized for pneumonia. Had genital warts at age 16. Absent cell-surface expression determines functional consequence of mutation on the T-cell. At age 35 IgG 10.9-17.6 (g/L), IgA .16-0.3(g/L), IgM 0.66-0.76 (g/L). IgA are below the reference range. At age 38 CD3+ T cells: 387; CD4+ T cells: 281 CD8+ T cells: 92 all below the reference range. Started intravenous immunoglobulin replacement which helped with his respiratory tract infection.

      CaseNotHPOs HP:0002718, HP:0410295, HP:0410303, HP:0003453, HP:0031160, HP:0002863

      CaseNotHPOsFreetext: Diphtheria

      CasePreviousTesting: Flow cytometric analysis, using two different antibodies recognizing distinct epitopes of ICOSL, showed that its cell-surface expression was absent in P1. Confocal microscopy likewise demonstrated decreased cell-surface expression. Both showed that ICOSL was absent. Sequencing of CXCR4 identified no mutation.

      CaseMethod1:WES

      CaseMethod2:Sanger Sequencing

      CaseGenotypingMethod: Whole-exome sequencing was performed on genomic DNA. Sanger Sequencing confirmed that he is homozygous for the variant.

      Variant: NM_015259.6:c.657C>G(p.Asn219Lys)

      ClinVar:

      CAID: CA321497070

      gnomAD: 0.00006424

      ​​VariantEvidence: No known direct consanguinity. RT PCR to compare the ICOSLG mRNA levels and it showed that there was not significant decay in the mRNA. We observed a similar phenomenon following transient transfection of HEK293T cells, which lack endogenous ICOSL, with either WT or p.N219K ICOSL protein. Western Blot analysis of whole cell lysates.p.N219K variant is reported at the highest frequency of 0.00006424 (4/62262 non Finnish European alleles in gnomAD 2.1.1.

      CaseAddInfo: French ICOSLN219K diminished B cell costimulation of T cells, providing a compelling basis for the observed defect in antibody and memory B cell generation. His parents were heterozygous and his healthy brother was homozygous for the WT allele

    1. Faisalabad histiocytosis

      Case: Family 1 Moynihan Proband VII:7, female, Pakistani

      CasePresentingHPOs: HP:0000407, HP:0004322, HP:0000135, HP:0100540, HP:0012385, HP:0002716, HP:0034920, HP:0034677, HP:0034391, HP:0030075, HP:0002862

      CasePresentingHPOsFreeText: Eyelid swellings due to histiocytic deposits, diverse cytoplasmic inclusions in phagocytes and reticulum cells of bone marrow, Lymph node and eyelid show reactive features with small reactive lymphoid follicles and histiocytes within dilated sinuses resembling RDD. invasive ductal carcinoma grade 3 ER negative breast aged 43 years and carcinoma bladder (grade 3 papillary TCC) age 46 years

      CaseNOTHPOs:

      CaseNOTHPOSFreeText:

      CasePreviousTesting: direct sequencing of PRF1 and UNC5B

      CaseGenotypingMethod: autozygosity mapping, genotyping (genome-wide linkage scan was performed using Affymetrix 250k SNP arrays), direct sequencing, PCR

      Variant: c.300+1G>A homozygous

      ClinVarID: or CAID: 130339/CA155238

      gnomAD: This splice site variant in intron 2 is present in gnomAD v4.0.0 at a MAF=0.0002197 (20/91048 alleles) in the South Asian population with 0 homozygotes.

      AddCaseInfo: brother is affected as well

      PreviouslyPublished: PMID: 9545394

      VariantEvidence: n/a

    1. II-9

      Case#: II-9, male, Asian, 38 yr, proband

      DiseaseAssertion: HCM, LQT1

      FamilyInfo: HCM passed on in family (figure 1)

      CasePresentingHPOs: HP:0001279, HP:0001712, HP:0001639 (Syncope, Left ventricular hypertrophy, Hypertrophic cardiomyopathy)

      CaseHPOFreeText: physical examination; 12-lead ECG (SR, HR 57 bpm, P 80 ms, PR 164 ms, QRS 102 ms, QTc 423 ms); 2D echocardiographic study with S5-1 probe (MLVWT 14 mm, EF 62%, LVMI 94.27 g/m^2);

      CaseNotHPOs: HP:0030148 (Heart murmurs)

      CaseNotHPOFreeText: No inverted T wave: Normal QTc 440 ms

      CasePreviousTesting: Additional Sanger sequencing for KCNQ1, MKLY2, TMEM70

      CaseGenotypingMethod: Illumina-SolexaHiSeq 2000 sequencing from peripheral blood leococytes; bi-directional Sanger sequencing;

      Variant: absent

      ClinVar: absent

      CAID: CA389036862 http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA389036862

      gnomAD: absent

      MultipleGeneVariants:

      (1) KCNQ1 Variant:

      Variant: NM_181798.1(KCNQ1):c.187C>T (p.Arg63Trp)

      ClinVar: 53070 https://www.ncbi.nlm.nih.gov/clinvar/variation/53070/

      CAID: n/a

      gnomAD: absent

      (2) MKLY2 Variant:

      Variant: absent

      ClinVar: absent

      CAID: CA408526793 http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA408526793

      gnomAD: African 0.00006453 https://gnomad.broadinstitute.org/variant/20-30412153-A-G

      (3) TMEM70 Variant:

      Variant: NM_017866.6(TMEM70):c.440T>C (p.Ile147Thr)

      ClinVar: 571761 https://www.ncbi.nlm.nih.gov/clinvar/variation/571761/

      CAID: n/a

      gnomAD: East Asian 0.0004893 https://gnomad.broadinstitute.org/variant/8-74893513-T-C

    1. We here add our observation of a similar bi-allelic OPA1 case with Behr syndrome. This proband is a 20-year-old Italian boy, born from unrelated parents (Fig. 1A, IV-4 in the pedigree), who presented a congenital nystagmus at birth and bilateral optic atrophy was recognized in the first year of life. He acquired autonomous walking at 14 months of age, but clumsy gait and frequent falls were reported. Motor difficulties and visual acuity worsened during childhood whereas cognitive development was normal. Brain MRI performed at the age of 4 and 7 years were normal. At 6 years of age, neurological examination showed ataxic-spastic gait with positive Romberg sign. Fundus exam confirmed bilateral optic atrophy (Fig. 1B). Tendon reflexes were brisk at the lower limbs and there was bilateral Babinski sign. The patient also had bilateral talipes equinovarus. Nerve conduction studies showed delayed sensory-motor velocities with reduced amplitudes of motor potentials and loss or severe reduction of sensory action potentials. Somatosensory evoked potentials could not be recorded and motor evoked potentials showed absent potentials at lower limbs and delayed latency at upper limbs. Brainstem evoked potentials were delayed bilaterally. Repeated urine organic acid gas chromatography/mass spectrometry analysis revealed mild elevation of 3-methylglutaconic acid (8–20 μmol/mmol creatinine). At muscle biopsy histology was normal and spectrophotometric assessment of the OXPHOS enzymatic activities was normal in muscle homogenate. Sural nerve biopsy demonstrated a marked reduction of the large-diameter myelinated axons (Fig. 1E–G). Teased fibre analysis disclosed regions of demyelination confined to the paranodal region, clustered in some axons, suggesting secondary demyelination. Ultrastructural examination confirmed the reduction of myelinated axons (not shown). A clinical revaluation at 15 years of age demonstrated elevated serum lactic acid after standardized exercise (3.9 mM, normal range 0.6–2.4mM) and optical coherence tomography revealed a generalized reduction of the retinal fibre layer thickness (Fig. 1D). At neurological examination, the patient was wheelchair bound due to severe sensory ataxia and spastic paraparesis and signs of cerebellar dysfunction, such as dysmetria, dysdiadochokinesia and positive Holmes rebound phenomenon, were evident. His vision was light perception with severe nistagmus in any direction of gaze. This clinical picture remained stable in the subsequent years. Figure 1. Open in a new tab (A) Reconstruction of the paternal and maternal genealogies of the proband with Behr syndrome (IV-4). The maternal side is remarkable for segregating isolated optic neuropathy in a dominant fashion associated with the heterozygous c.1705+1G>T splicing mutation. (B–D) Ophthalmological investigations. The fundus picture of the proband (IV-4) reveals severe optic atrophy with bilateral pale optic disc (B). The fundus picture of the mother (III-4) shows only a mild optic atrophy with temporal pallor of the optic discs bilaterally (C). Optical coherence tomography examination of retinal nerve fibre layer (RNFL) thickness in the proband shows a diffuse reduction of thickness compatible with the severe optic atrophy (D). (E–G) Semithin cross-section of the sural nerve biopsy. A marked depletion of large myelinated axons affects the sural nerve (E and F). At higher magnification some axons appear to have a thin myelin sheath related to the axonal diameter (G). (H–L) Brain MRI and 1HMR spectroscopy studies. On the left (H) the sagittal FSPGR (Fast SPoiled GRadient echo) T1 shows a mild cerebellar atrophy in the proband (IV-4), and on the right (I) a mild pathological accumulation of lactate (rectangle) was detected in the CSF of lateral ventriculi. On the axial FLAIR T2 sequence no signal changes were detected in the proband (IV-4) (J), whereas few focal hyperintensities, related to not specific areas of gliosis, in the cerebral white matter of the proband’s father (III-3) (K) and mother (III-4) (L) were present. TEMP = temporal; SUP = superior; NAS = nasal; INF = inferior; MRI = magnetic resonance imaging; HMR = proton magnetic resonance; CSF = cerebrospinal fluid; FLAIR = Fluid attenuated inversion recovery.The 43-year-old proband’s mother (Fig. 1A, III-4 in the pedigree) had isolated optic atrophy, most evident on the temporal side (Fig. 1C), which segregated as a dominant trait in her family (Fig. 1A). The remaining neurological examination was normal. Nerve conduction velocities and somatosensory evoked potentials were normal. The other affected individuals in this family all suffered a non-syndromic optic atrophy, which started in childhood and progressively worsened, but remained as an isolated symptom. The proband’s father and the elder sister (Fig. 1A, III-3 and IV-3, respectively) are healthy. In particular, neither signs of optic neuropathy nor abnormal nerve conduction velocities were recorded upon neuro-ophthalmological exam. Both parents and the proband have been investigated by brain MRI and proton magnetic resonance spectroscopy (1H-MRS) in a 1.5 T scanner. There were no MRI structural or metabolic abnormalities in the father (III-3) and the mother (III-4) of the proband, except for a few focal hyperintensities in the cerebral white matter (Fig. 1K–L), whereas in the proband mild cerebellar atrophy (Fig. 1H,J) and pathological accumulation of lactate in the CSF of lateral ventriculi (Fig. 1I) were evident. Direct sequencing of the entire coding regions of the OPA1 gene and the flanking intronic boundaries disclosed two heterozygous mutations. The first c.1705+1G>T mutation occurs in intron 17 and involves the highly conserved donor splice site consensus sequence. Analysis of cDNA revealed aberrant transcript splicing with the activation of a cryptic splice donor site in exon 17, which predicts a prematurely truncated gene product (data not shown). This haploinsufficiency mutation was also identified in the affected mother and in nine maternal relatives, three of which (III-10, III-14 and III-18) are clinically unaffected (Fig. 1A). The second mutation identified in the proband is missense, c.1146A>G (p.I382M), which lies in exon 12, being also present in the clinically unaffected father and sister. Interestingly this is the same missense mutation already reported in other bi-allelic cases (Schaaf et al., 2011; Bonifert et al., 2014). This mutation was found only in one other patient in Italy, out of 132 OPA1 complete sequences. This patient is currently under investigation, being another case of Behr syndrome with optic atrophy complicated by ataxia, but with only the heterozygous c.1146A>G (p.I382M) mutation at the moment (Leonardo Caporali and Valerio Carelli, unpublished data). In the Tübingen cohort of patients with bilateral optic atrophy (in most cases isolated optic atrophy) no further case with the c.1146A>G mutation was found among ∼500 patients that underwent sequencing of all coding exons of the OPA1 gene. This mutation has also been found at low frequency (about 1/1000) in large public data sets (1000 Genome Project, NHLBI GO Exome Sequencing Project). Sequence analysis of the OPA3 gene excluded the presence of pathogenic mutations. Fibroblasts were grown from skin biopsies obtained from the proband and both parents, after approval of the Internal Review Board and signed informed consent. In fibroblasts we first assessed mitochondrial network morphology, after loading mitochondria with Mitotracker Red and examination by fluorescence microscopy as previously reported (Zanna et al., 2008). The mitochondrial network of fibroblasts grown in standard Dulbecco’s modified Eagle’s medium-glucose medium bearing the heterozygous c.1705+1G>T (III:4) and c.1146A>G (III:3) mutations, respectively was similar to controls (Fig. 2A–C), whereas the fibroblasts from the proband were scored into three categories, those with a typical normal filamentous network (Fig. 2D), those with a hyperfragmented pattern (Fig. 2E) and those with filamentous mitochondria containing balloon-like structures (Fig. 2F), each class being present at approximately the same percentage. To investigate whether these OPA1 mutations could affect the bioenergetic efficiency, we measured the rate of mitochondrial ATP synthesis in digitonin-permeabilized fibroblasts. Compared to controls, mitochondrial ATP synthesis driven by complex I substrates (pyruvate and malate) was increased in the proband’s father fibroblasts (III:3) bearing the c.1146A>G mutation, and incrementally reduced in the mother’s fibroblasts bearing the c.1705+1G>T (III:4) mutation and in the proband’s fibroblasts (IV:4) carrying both mutations. The latter was significantly lower compared to his father’s fibroblasts. A similar but less severe situation was observed for the ATP synthesis driven by the complex II substrate (succinate) (Fig. 2G). Overall, these results indicate that the biallelic mutation in the proband led to abnormal network dynamics and impaired ATP synthesis through complex I. Both parent’s mutations were not severe enough to impair mitochondrial network dynamics under the experimental conditions used, but the mother’s mutation impaired partially complex I-dependent ATP synthesis. Figure 2. Open in a new tab (A–F) Mitochondrial network morphology. Control (A) and patient (B–F) fibroblasts were grown in Dulbecco’s modified Eagle’s medium-glucose and loaded with Mitotracker Red as described in Zanna et al. (2008). Representative out of eight similar images are shown for each individual. (G) ATP synthesis. Fibroblasts were treated with 50 µg/ml digitonin, the rate of ATP synthesis was measured as described in Zanna et al. (2008) and was normalized for citrate synthase (CS) activity. Data (mean ± SEM) were obtained from five controls and the three OPA1 mutated fibroblasts. The experiment was performed at least in triplicate. Asterisk denotes values significantly different (P < 0.05) by Kruskal-Wallis one-way ANOVA on Ranks. GPD = Glyceraldehyde 3-phosphate dehydrogenase.

      Case#: Carelli proband, 20yo, Italian, male, onset in first year of life

      DiseaseAssertion: Behr syndrome

      FamilyInfo: Parents are unrelated. c.1705+1G>T was also identified in the affected mother and in nine maternal relatives, three of which (III-10, III-14 and III-18) are clinically unaffected (pedigree in Fig. 1A). The 43-year-old proband’s mother (Fig. 1A, III-4 in the pedigree) had isolated optic atrophy, most evident on the temporal side (Fig. 1C), which segregated as a dominant trait in her family (Fig. 1A). The other affected individuals in this family all suffered a non-syndromic optic atrophy, which started in childhood and progressively worsened, but remained as an isolated symptom. c.1146A>G (p.I382M) is present in the clinically unaffected father and sister. There were no MRI structural or metabolic abnormalities in the father (III-3) and the mother (III-4) of the proband, except for a few focal hyperintensities in the cerebral white matter (Fig. 1K–L). Neither signs of optic neuropathy nor abnormal nerve conduction velocities were recorded upon neuro-ophthalmological exam of the proband’s father and the elder sister (III-3 and IV-3).

      CasePresentingHPOs: HP:0006934, HP:0000648, HP:0002066, HP:0002359, HP:0007663, HP:0002064, HP:0002403, HP:0001776, HP:0002395, HP:0003487, HP:0007078, HP:0012898, HP:0012897, HP:0003535, HP:0003387, HP:0001272, HP:0000543, HP:0010871, HP:0002313, HP:0001310, HP:0002075, HP:0000639

      CaseHPOFreeText: Bilateral optic atrophy. Motor difficulties and visual acuity worsened during childhood. Nerve conduction studies showed delayed sensory-motor velocities with reduced amplitudes of motor potentials. Somatosensory evoked potentials could not be recorded and motor evoked potentials showed absent potentials at lower limbs and delayed latency at upper limbs. Brainstem evoked potentials were delayed bilaterally. Repeated urine organic acid gas chromatography/mass spectrometry analysis revealed mild elevation of 3-methylglutaconic acid (8–20 μmol/mmol creatinine). Sural nerve biopsy demonstrated a marked reduction of the large-diameter myelinated axons (Fig. 1E–G). Teased fibre analysis disclosed regions of demyelination confined to the paranodal region, clustered in some axons, suggesting secondary demyelination. Ultrastructural examination confirmed the reduction of myelinated axons (not shown). Elevated serum lactic acid after standardized exercise. mild cerebellar atrophy and pathological accumulation of lactate in the CSF of lateral ventriculi. OCT examination of retinal nerve fibre layer (RNFL) thickness shows a diffuse reduction of thickness compatible with the severe optic atrophy. Positive Holmes rebound phenomenon. Vision was light perception with severe nystagmus in any direction of gaze. Compared to controls, mitochondrial ATP synthesis driven by complex I substrates (pyruvate and malate) was incrementally reduced in the mother’s fibroblasts bearing the c.1705+1G>T (III:4) mutation and in the proband’s fibroblasts (IV:4) carrying both mutations.

      CaseNotHPOs:

      CaseNotHPOFreeText: cognitive delay

      GenotypingMethod: Direct sequencing of the entire coding regions of the OPA1 gene and the flanking intronic boundaries. Sequence analysis of the OPA3 gene excluded the presence of pathogenic mutations.

      PreviouslyPublished:

      Variant: c.1705+1G>T; c.1146A>G (p.I382M)

      CAID: CA10576007

      SupplementalData:

    1. While genes with established links to skeletal dysplasia accounted for the majority of cases (91%) (Supplementary Figure S2, Table S1 online), our analysis revealed potential confirmation of previously reported candidates. Specifically, C3orf17 (NEPRO) was previously proposed by us as a novel candidate gene in an autosomal recessive Larsen-like phenotype.13.Shaheen R. Patel N. Shamseldin H. et al.Accelerating matchmaking of novel dysmorphology syndromes through clinical and genomic characterization of a large cohort.10.1038/gim.2015.147Genet Med. 2015; 18: 686-695Google Scholar In addition to the previously published family, we were able to identify a second family (15DG2238 and 15DG2239) with an identical phenotype of facial dysmorphism (midfacial hypoplasia, depressed nasal bridge, frontal bossing, wide anterior fontanel), chest narrowing with pectus excavatum, and acromelia (see Figure 2 and Supplementary Table S2 online) in whom we identified the same homozygous variant (haplotype analysis confirmed the founder nature of the variant).

      Case#: Case 12DG1568, female, Arab, 18mo

      DiseaseAssertion: MPS Ih

      FamilyInfo: Parents are a second-degree consanguineous couple with three other healthy children, and they had a son who died at 12 years of age and a cousin with a similar phenotype

      CasePresentingHPOs: HP:0000280, HP:0100876, HP:0005280, HP:0000463, HP:0000256, HP:0001433

      CaseHPOFreeText:

      CaseNotHPOs:

      CaseNotHPOFreeText:

      PreviouslyPublished: n/a

      Variant: NM_000203.5(IDUA):c.613_617dup (p.Glu207fs) homozygous

      ClinVar: 11921

      CAID: CA256123

      SupplementalData: genotype and phenotype in Table S1, S6

    1. VII-3 Son

      CaseVII-3: Male, 4 years report, Turkey

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

      HPOsFreeText: -3.44 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, Mutation is at splice donor site at Intron 2

      CasePreviousTesting: Calcium levels (9.0 mg/dL), Decreased serum phosphate levels (3.1 mg/dL; reference 3.8-6.5), Elevated serum ALP (393 IU/L; reference 90-325), 25OHD3 levels (4.9 ng/ml), 1,25(OH)2D3 levels (N/A pg/mL), PTH levels (154.7 ng/L), TPR levels (58.7), Decreased TmP/GFR levels (1.82; 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(PHEX):c.187+1G>T

      CinVar: 438537 https://www.ncbi.nlm.nih.gov/clinvar/variation/438537/

      gnomAD: Not in gnomAD

    2. II-2 Mother

      CaseII:II-2: Female, 37 years, Turkey

      CasePresentingHPOs: HP:0004912, HP:0004322, HP:0002970, (Hypophosphatemic rickets, Short stature, Genu varum)

      HPOsFreeText: -3.95 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 novel, Mother of II:II-3

      CasePreviousTesting: Calcium levels (9.8 mg/dL), Decreased serum phosphate levels (2.1 mg/dL; reference 2.7-4.5), Normal serum ALP (111 IU/L; reference 41-120), 25OHD3 levels (10.5 ng/ml), 1,25(OH)2D3 levels (N/A pg/mL), PTH levels (73 ng/L), TPR levels (87), Decreased TmP/GFR levels (1.70; reference 2.2-3.6)

      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.979_983dup (p.His329Thrfs*4)

      CAID: CA913187410 https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA913187410

      gnomAD: Not in gnomAD

    1. A novel RAB39B mutation and concurrent de novo NF1 mutation in a boy with neurofibromatosis type 1, intellectual disability, and autism: a case report

      PMID: 28851564

      Gene: RAB39B

      Disease: early-onset parkinsonism-intellectual disability syndrome

      MonDO: MONDO:0010709

      Notes: The proband reported has clinical features of neurofibromatosis, with a de novo donor splice site variant in NF1, as well as a 12-bp deletion in RAB39B, which the authors assert was responsible for the phenotypes of severe ID, behavioral problems and aggressiveness.

    1. In isolated case D

      CaseID D

      VariantInPub IVS2+9G>A

      MANE NM_001368894.2:c.-129+9G>A

      Zygosity heterozygous

      PhenotypesProband HP:0000568, HP:0000482, HP:0000518, HP:0000639, HP:0000647, HP:0000491

      FamilyInfo No family or segregation information was included

      SpliceFormVariant No RT-PCR or northern blot to confirm the intronic substitution lead to a splice variant

    1. Case Description

      Case#: Ma_Proband

      Demographics: east Asian? referenced in passing in discussion section

      CasePresentingHPOs: HP:0003182, HP:0008812, HP:0002655, HP:0003621, HP:0000943, HP:0001498, HP:0003049, HP:0002857, HP:0004689,

      CaseNotHPOs: HP:0008445, HP:0002751, HP:0000768, HP:0008445

      CasePreviousTesting: Previous diagnosis Developmental dysplasia of the hip (DDH)

      CaseMethod1: quantify urinary excretion of glycosaminoglycans using dimethylmethylene blue

      CaseMethod2:

      CaseGenotypingMethod: Whole exome sequencing

      Variant HGVS: 1) NM_000512.5:c.1156C>T 2) NM_000512.5:c.1288C>G

      ClinVar: 1) 700 2) N/A

      CAID: 1) CA221040 2) CA397096290

      gnomAD v2: 1) 16-88891261-G-A 2) N/A

      VariantEvidence:

      CaseAddInfo: Onset of symptoms age 8, compound het

      CasePMIDs:

    2. Laboratory tests, the pedigree of the patient, and sequencing information. (A) Proband is a 17-year-old woman with a major complaint of progressive walking pain in bilateral hips which gradually disabled her from any motion of lower extremities since the clinical manifestation debuted at her age of 8. We discovered compound heterozygous variants at exon 11 (c.1156C>T; blue arrows) and exon 12 (c.1288C>G; red arrows) of the GALNS gene, respectively. The sequencing results indicate both parents are respective carriers and each donated a different heterozygous allele. (B) Urinary GAG/Creatinine (mg/mmol) was measured using samples collected from MPS IVA patient and their family members during hospital visits.

      Family#PresentingHPOs: None

      FamilyNotHPOs: Free of clinical phenotypes

      CountryOrigin: China

      Ethnicity: Chinese

      Race: east Asian

      Family#GenotypingMethod: Whole exome sequencing

      Affected: None reported

      Unaffected: mother and maternal grandmother carriers of same allele, father carrier for separate allele

      Segregations: 2?

      PublishedLOD: N/A

      eLOD: too few segregations

      AddSegregationInfo:

      ProbandLabel: Ma_Proband

      Variant: Maternal - NM_000512.5:c.1288C>G Paternal - NM_000512.5:c.1156C>T

      ClinVar:

      CAID:

      gnomAD:

      FamilyAddInfo: paternal allele is previously reported as pathogenic, maternal allele and has only been reported in one proband/family

      FamilyPMIDs: 34557487

    1. Case#: Consequence 23 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.2788G>A (p.Glu930Lys)

      ClinVar: 42933 https://www.ncbi.nlm.nih.gov/clinvar/variation/42933/

      CAID: n/a

      gnomAD: absent

    2. Case#: Consequence 20 Table 1 in Data Supplement (3 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.4066G>A (p.Glu1356Lys)

      ClinVar: 164294 https://www.ncbi.nlm.nih.gov/clinvar/variation/164294/

      CAID: n/a

      gnomAD: absent

    3. Case#: Consequence 9 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.427C>T (p.Arg143Trp)

      ClinVar: 164401 https://www.ncbi.nlm.nih.gov/clinvar/variation/164401/

      CAID: n/a

      gnomAD: 0.0001087 East Asian https://gnomad.broadinstitute.org/variant/14-23901923-G-A

    4. Case#: Consequence 30 Table 1 in Data Supplement (2 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.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

    5. Case#: Consequence 11 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.2779G>A (p.Glu927Lys)

      ClinVar: 42932 https://www.ncbi.nlm.nih.gov/clinvar/variation/42932/

      CAID: n/a

      gnomAD: absent

    1. A 5-year-old south Asian female was incidentally found to have hepatomegaly on a trip to India, where she became acutely ill with fever, vomiting, and abdominal pain. Blood work done at that time demonstrated mildly elevated liver function tests (AST 48 U/L, ALT 80 U/L), and an abdominal ultrasound revealed hepatomegaly without biliary or splenic abnormalities. She was prescribed an antibiotic and her symptoms gradually resolved.A month after her return to the United States, her pediatrician noted persistent hepatomegaly and the new development of fever. She was referred to the emergency department because of suspicion of a tropical infectious disease. A repeat ultrasound demonstrated persistent hepatomegaly. Her transaminases (AST 133 U/L, ALT 112 U/L) remained elevated. The infectious workup was negative for cytomegalovirus, hepatitis A, Lyme disease, and malaria. She did have a positive Epstein-Barr virus IgM. Repeat blood work was obtained at follow-up infectious disease clinic visit where she was again found to have hepatomegaly (7 cm below the costal margin) and mildly abnormal transaminases. A computed tomography of the abdomen and pelvis (Figure 1) was performed that demonstrated hepatomegaly but had otherwise normal findings. Her fever resolved within 2 weeks. She was otherwise well and was not on any medications. There was no family history of liver disease. Her immunizations were up to date. Because of persistent hepatomegaly, she was referred to the liver clinic.Open in a separate windowFigure 1Computed tomography of abdomen and pelvis. The liver is enlarged, measuring up to 17 cm in width and craniocaudal dimension. The contour is smooth. The hepatic parenchyma is homogenous without a focal mass. There is no intrahepatic biliary dilatation. The portal and hepatic venous systems are patent and nondilated.In the liver clinic, she was noted to have an enlarged, firm liver, palpable 8 cm below the costal margin with no associated splenomegaly. Test results for autoimmune hepatitis, WD, and alpha-1-antitrypsin deficiency were negative. Nonfasting lipid levels were abnormal; repeat testing showed a fasting total cholesterol of 305 mg/dL and a triglyceride level of 142 mg/dL.On the basis of a clinical suspicion of a diagnosis of CESD, a liver biopsy was performed. It revealed diffuse, microvesicular steatosis in the hepatic parenchyma (Figure 2(a)). Portal tracts were expanded by foamy macrophages containing finely vacuolated material, which was periodic acid-Schiff positive and resistant to diastase digestion. Trichrome stain for collagen showed mild portal fibrosis with early delicate bridging fibrosis. Ultrastructurally, the cytoplasm had a moth-eaten appearance with the presence of lipid droplets and cholesterol crystals (Figure 2(b)). There was no evidence of hepatocellular necrosis, cholestasis, or bile duct proliferation.Open in a separate windowFigure 2(a) Liver biopsy, periodic acid-Schiff stain with diastase (magnification, ×40). Lipid demonstrated within the hepatocellular cytoplasm (arrows). (b) Electron micrograph (direct magnification, ×2500). The hepatocellular cytoplasm in places has a moth-eaten appearance with lipid droplets (arrows). Additionally, some foci show cholesterol crystals (∗) free in the hepatocellular cytoplasm.Liver tissue was sent to Dr. D. Wenger's Lysosomal Diseases Testing Laboratory at Thomas Jefferson University. She was found to have a low acid lipase activity of 7.2 (no units provided by Dr. D. Wenger's laboratory) in the liver. Follow-up testing through a commercial laboratory demonstrated low level of lysosomal acid lipase activity (0.008 nmol/punch/h) in blood. Lysosomal acid lipase gene sequence analysis was performed, which demonstrated that she was heterozygous for the following two mutations: c.57_60delTGAG and c.894G>A. Both parents underwent mutation analysis. The mother was confirmed to have the c.894G>A mutation while the father carried the c.57_60delTGAG mutation. The c.57_60delTGAG is a new mutation not previously described in the literature in patients with CESD.Go to:

      Case: Lin Patient-female, south Asian, 5 years old at diagnosis

      CasePresentingHPOs: HP:0001945, HP:0002013, HP:0002027, HP:0002240

      CasePresentingHPOsFreeText: Mildly elevated liver function tests (AST 48 U/L, ALT 80 U/L) upon initial visit, transaminases (AST 133 U/L, ALT 112 U/L) remained elevated after a month. Non-fasting lipid levels were abnormal; repeat testing showed a fasting total cholesterol of 305 mg/dL and a triglyceride level of 142 mg/dL. Diffuse, microvesicular steatosis in the hepatic parenchyma. Portal tracts were expanded by foamy macrophages containing finely vacuolated material, which was periodic acid-Schiff positive and resistant to diastase digestion. Trichrome stain for collagen showed mild portal fibrosis with early delicate bridging fibrosis. Ultrastructurally, the cytoplasm had a moth-eaten appearance with the presence of lipid droplets and cholesterol crystals. Low acid lipase activity of 7.2 (no units provided) in the liver, with follow up low level of lysosomal acid lipase activity (0.008 nmol/punch/h) in blood.

      CaseNOTHPOs: HP:0032316, HP:0001744, HP:0001404, HP:0001396, HP:0001408

      CaseNOTHPOSFreeText:

      CasePreviousTesting: Abdominal ultrasound. Infection workup was negative for cytomegalovirus, hepatitis A, Lyme disease, and malaria. She did have a positive Epstein-Barr virus IgM. CT of the abdomen and pelvis revealed an enlarged liver measuring up to 17cm in width and craniocaudal dimension. Test results for autoimmune hepatitis, WD, and alpha-1-antitrypsin deficiency were negative. Liver biopsy.

      CaseGenotypingMethod: LAL gene sequence analysis was performed.

      Variant: c.57_60delTGAG and c.894G>A

      ClinVarID: or CAID: CA2573331826 and 203361

      gnomAD: This proband has a four-nucleotide deletion, c.57_60delTGAG, in exon 2 of the LIPA gene. This variant is predicted to result in a premature translation stop downstream of the deletion (p.Glu20GlyfsTer6). The variant is not present in gnomAD. This proband is scored default points.

      This proband has a synonymous variant, Gln298= on exon 8/10 in a cononical splice site, which causes an abnormal splicing that results in the in-frame skipping of exon 8. The variant is reported in 167/128942 European (non-Finnish) alleles at a frequency of 0.001295, with no homozygotes in gnomAD v2.1.1. This is the most frequent variant in CESD patients (present in 40-60% of patients reported in the literature), but it is not confirmed if this is due to a hotspot or a common ancestor. This proband is scored default points.

      AddCaseInfo: Confirmed in trans

      PreviouslyPublished: no

      VariantEvidence: Predicted evidence only for deletion variant.

      Expression analysis in patient fibroblasts found lysosomal acidic lipase (LAL) activity to be reduced to 6-12% of wild type (PMID: 22227072).

    1. WES analysis of the proband (V:3, Figure 1) resulted in the identification of a biallelic variant (c.697G>A, p.Asp233Asn) in GALNS

      Case#: V:3

      Demographics: Pakistani

      CasePresentingHPOs: HP:0004322, HP:0000768, HP:0000470, HP:0002857, HP:0002650, HP:0002007, HP:0000431, HP:0010674, HP:0002515, HP:0009803, HP:0006119, HP:0001216, HP:0002986, HP:0003027, HP:0008802, HP:0030299, HP:0000926, HP:0004568

      CaseNotHPOs:

      CasePreviousTesting:

      CaseMethod1:

      CaseMethod2:

      CaseGenotypingMethod: Proband whole exome seq

      Variant: NM_000512.5:c.697G>A

      ClinVar: 1048200

      CAID: CA8235027

      gnomAD: 16-88902194-C-T

      VariantEvidence: previous pub as pathogenic, and in silico data suggesting damage to catalytic domain

      CaseAddInfo: Family was tested via single gene sanger seq., consanguineous parents both carriers, two affected siblings and three unaffected siblings

      CasePMIDs:

    1. Individual F3-II2

      Case# F3-II2, female, 1yo onset, French

      CasePresentingHPOs HP:0006579, HP:0003155, HP:0001290, HP:0001397, HP:0001395, HP:0001263, HP:0001250, HP:0000718, HP:0000713, HP:0000709, HP:0012347, HP:0003124, HP:0003141, HP:0010837 (Neonatal Jaundice, Elevated alkaline phosphatase, Hypotonia, Steatosis, Hepatic fibrosis, Psychomotor delay, Seizures, Aggressive behavior, Agitation, Psychosis, Abnormal protein N-linked glycosylation, High cholesterol, Increased LDL cholesterol, Low ceruloplasmin)

      HPOsFreeText Persistent moderate hypotonia, elevated AT, necrotic lesions on liver biopsy, steatosis and fibrosis(1yo), developed various behavioral issues by age 25

      CaseNotHPOs n/a

      CasePreviousTesting Metabolic work up: AST 1,780 U/l[normal range, 0–50 U/l], ALT 390 U/l[normal range, 0–50 U/l], and ALP 950 U/l [normal range, < 360 U/l], with increased bone fraction, ceruloplasmin 10 mg/dl[normal range, 15–60 mg/dl], type 2 CDG, abnormal N-glycosylation

      CaseMethod1 Sanger

      CaseMethod2 n/a

      CaseGenotypingMethod Sanger on proband targeting CCDC115.

      Variant NM_032357.3(CCDC115):c.92T>C (p.Leu31Ser), homozygous

      ClinVar 218967

      gnomAD 0.00002384(European (Non-Finnish)), 0.00001086(Total)-3 heterozygotes

      VariantEvidence n/a

      CaseAddInfo unaffected brother

      CasePMIDs 29759592

    2. Individual F2-II1

      Case# F2-II1, male, Italian, 2yo diagnosis

      CasePresentingHPOs HP:0006579, HP:0001433, HP:0010837, HP:0003124, HP:0003155, HP:0001263, HP:0001999, HP:0025321, HP:0012358, HP:0012347, HP:0003141 (Neonatal jaundice, Hepatosplenomegaly, Decreased ceruloplasmin, High cholesterol, Elevated alkaline phosphatase, Psychomotor delay, Dysmorphic facies, Liver copper accumulation, Abnormal protein O-linked glycosylation, Abnormal protein N-linked glycosylation, Increased LDL cholesterol)

      HPOsFreeText Elevated AT, ALT, cholesterol, jaundice, hepatosplenomegaly, low blood ceruloplasmin(neonate), Mild psychomotor disability, mild dysmorphic facies (2yo)

      CaseNotHPOs n/a

      CasePreviousTesting Failed to detect ATP7B on suspected Wilson disease. Metabolic work up: AST 422 U/l[normal range, 0–50 U/l], ALT 588 U/l[normal range, 0–50 U/l], ALP 976 U/l[normal range, < 360 U/l], type 2 CDG (2yo). Hepatic copper 125 μg/g dry weightnormal range, <40 μg/g, Altered ApoC3 pattern, type 2 CDG pattern

      CaseMethod1 WES

      CaseMethod2 Sanger

      CaseGenotypingMethod WES confirmed with Sanger homozygosity in proband and heterozygosity in parents. Variants with frequency of >0.2%, synonymous variants, deep intronic variants, and variants in UTRs were excluded.

      Variant NM_032357.3(CCDC115):c.92T>C (p.Leu31Ser), homozygous

      ClinVar 218967

      gnomAD 0.00002384(European (Non-Finnish)), 0.00001086(Total)-3 heterozygotes

      VariantEvidence n/a

      CaseAddInfo n/a

      CasePMIDs 26833332, 29759592

    3. Individual F1-II1

      Family#PresentingHPOs HP:0001263, HP:0001433, HP:0003155, HP:0012358, HP:0012347, HP:0010837, HP:0001999 (Pyschomotor delay, Hepatosplenomegaly, Abnormal protein O-linked glycosylation, Abnormal protein N-linked glycosylation, Decreased ceruloplasmin, Dysmorphic facies)

      HPOsFreeText Elevated aminotranseferases, type 2 CDG

      FamilyNotHPOs n/a

      CountryOrigin n/a

      Ethnicity Turkish

      Race n/a

      Family#PreviousTesting Metabolic screen indicated elevated AT, bone derived ALP, and low ceruloplasmin.

      Family#Method1 WES

      Family#Method2 Sanger

      Family#GenotypingMethod WES confirmed with Sanger homozygosity in siblings and heterozygosity in parents. Variants with frequency of >0.2%, synonymous variants, deep intronic variants, and variants in UTRs were excluded.

      Affected 3

      Unaffected 1

      Segregations 3

      PublishedLOD n/a

      eLOD 1.32

      AddSegregationInfo consanguinity

      ProbandLabel F1-II1, female, 9yo report

      Case1PresentingHPOs HP:0001252, HP:0003236 (Hypotonia, Elevated CK)

      HPOsFreeText decreased coagulation factors

      Case1PreviousTesting Metabolic work up: AST 130–158 U/l [normal range, 0–50 U/l], ALT 85–101 U/l [normal range, 0–50 U/l], and ALP 1,016 –1,193 U/l [normal range, < 360 U/l], serum ceruloplasmin (4 mg/dl [normal range, 15–60 mg/dl]. No change in CD59 and CD55 expression in EBV-transformed lymphoblasts.

      Case2 F1-II2, male, 5yo report

      Case2PresentingHPOs HP:0003124, HP:0000276, HP:0000508, HP:0000592, HP:0000494, HP:0100295, HP:0001433 (Hypercholesterolemia, Long face, Ptosis, Blue sclera, Downslanting palpebral fissures, Muscle fiber atrophy, Hepatosplenomegaly)

      HPOsFreeText Hepatosplenomegaly normalized with age, abnormal coagulation factors

      Case2PreviousTesting Metabolic work up: AST 96–436 U/l [normal range, 0–50 U/l], ALT 140–995 U/l [normal range, 0–50 U/l], and ALP 1,070–1,577 U/l [normal range, < 360 U/l], serum ceruloplasmin (4 mg/dl [normal range, 15–60 mg/dl], cholesterol 289 mg/dl [normal range, 120–200 mg/dl]

      Variant NM_032357.3(CCDC115):c.92T>C (p.Leu31Ser), homozygous

      ClinVar 218967

      gnomAD 0.00002384(European (Non-Finnish)), 0.00001086(Total)-3 heterozygotes

      VariantEvidence n/a

      FamilyAddInfo A third ungenotyped sibling, F1-II4 did not have hypotonia, but otherwise presented similarly.

      FamilyPMIDs 29759592

    1. A second mutation

      Case7: Female, 8 yrs onset

      CasePresentingHPOs: HP:0006785, HP:0003236, HP:0040083, HP:0003701, HP:0003323, HP:0008981, HP:0003458, HP:0030951 (Limb-girdle muscular dystrophy, Elevated serum creatine kinase, Toe walking, Proximal muscle weakness, Progressive muscle weakness, Calf muscle hypertrophy, EMG: myopathic abnormalities, Skeletal muscle fibrosis)

      HPOsFreeText: N/A

      CaseNotHPOs: HP:0100543 (Cognitive impairment)

      NotHPOsFreeText: N/A

      CaseAddInfo: Proband is homozygous for this deletion, Mother is confirmed heterozygous

      CasePreviousTesting: Peak CPK at 17,000 IU/l, Partially absent α- and β-sarcoglycan staining, Normal dystrophin content, Totally absent γ-sarcoglycan staining

      CaseGenotypingMethod: Total mRNA was isolated from muscle biopsies and cDNA was synthesized from it via reverse transcriptase. PCR and SSCP analysis was performed and excised, amplified, and sequenced. After finding the mutations, DNA from peripheral blood leukocytes or muscle biposies was isolated, PCR amplified, and sequenced to confirm the results.

      Variant: SGCG, 2-BP DEL, 793TG

      ClinVar: 2007 https://www.ncbi.nlm.nih.gov/clinvar/variation/2007/

      Also Reported As

      Variant: NM_000231.2(SGCG):c.794_795GT[3] (p.Cys267fs)

      ClinVar: 552513 https://www.ncbi.nlm.nih.gov/clinvar/variation/552513/

      gnomAD: 0.00009923, https://gnomad.broadinstitute.org/variant/13-23898596-CTG-C

    2. A fourth mutation

      Case19: Male, 4 yrs onset

      CasePresentingHPOs: HP:0006785, HP:0003236, HP:0003458, HP:0008981, HP:0031322, HP:0032019, HP:0003701 (Limb-girdle muscular dystrophy, Elevated serum creatine kinase, EMG: myopathic abnormalities, Calf muscle hypertrophy, Myocardial lymphocytic infiltration, Muscle eosinophilia, Proximal muscle weakness)

      HPOsFreeText: N/A

      CaseNotHPOs: HP:0100543 (Cognitive impairment)

      NotHPOsFreeText: N/A

      CaseAddInfo: Proband is homozygous for this deletion, Parents are confirmed heterozygous and consangeuinous

      CasePreviousTesting: Peak CPK at 25,000 IU/l, Partially absent α- and β-sarcoglycan staining, Normal dystrophin content, Totally absent γ-sarcoglycan staining

      CaseGenotypingMethod: Total mRNA was isolated from muscle biopsies and cDNA was synthesized from it via reverse transcriptase. PCR and SSCP analysis was performed and excised, amplified, and sequenced. After finding the mutations, DNA from peripheral blood leukocytes or muscle biposies was isolated, PCR amplified, and sequenced to confirm the results.

      ClinVar: 2004 https://www.ncbi.nlm.nih.gov/clinvar/variation/2004/

      Also Reported As

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

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

      gnomAD: 0.00009671, https://gnomad.broadinstitute.org/variant/13-23869568-CT-C

    3. One mutation

      Case44: Female, 7 yrs onset

      CasePresentingHPOs: HP:0006785, HP:0003236, HP:0040083, HP:0003307, HP:0002527, HP:0003701, HP:0003323, HP:0009042, HP:0003458, HP:0100305, HP:0031542 (Limb-girdle muscular dystrophy, Elevated serum creatine kinase, Toe walking, Hyperlordosis, Falls, Proximal muscle weakness, Progressive muscle weakness, Marked muscular hypertrophy, EMG: myopathic abnormalities, Ring fibers, Myelin-like whorls in vacuolated fibers)

      HPOsFreeText: Wheelchair at 14 yrs

      CaseNotHPOs: HP:0003115, HP:0100543 (Abnormal EKG, Cognitive impairment)

      NotHPOsFreeText: N/A

      CaseAddInfo: Proband is homozygous for this duplication, Parents are confirmed heterozygous

      CasePreviousTesting: Peak CPK at 20,000 IU/l, Partially absent α- and β-sarcoglycan staining, Normal dystrophin content, Totally absent γ-sarcoglycan staining

      CaseGenotypingMethod: Total mRNA was isolated from muscle biopsies and cDNA was synthesized from it via reverse transcriptase. PCR and SSCP analysis was performed and excised, amplified, and sequenced. After finding the mutations, DNA from peripheral blood leukocytes or muscle biposies was isolated, PCR amplified, and sequenced to confirm the results.

      Variant: NM_000231.2(SGCG):c.87dup (p.Gly30fs)

      ClinVar: 2008 https://www.ncbi.nlm.nih.gov/clinvar/variation/2008/

      gnomAD: 0.000008805, https://gnomad.broadinstitute.org/variant/13-23777919-A-AT

    1. 5FemaleT1.40.6[c.1037 T > G] + [c.1091C > T][p.L346R] + [p.T364 M]8, 8K [44]/K [45]0.81Positive

      Case#: Newborn 5, female, 1.4 months, Taiwan

      DiseaseAssertion: MPS1

      FamilyInfo: proband is a twin with newborn 6, who has the same genotype

      CasePresentingHPOs:

      CaseHPOFreeText: IDUA enzyme activity in leukocytes= 0.81 (Ref. 4.87 ~ 54.70 μmol/g protein/h, with cut-off values of < 3.0), positive GAG tests (GAG tests including GAG quantification (DMB/Cre ratio), 2-dimensional electrophoresis, and quantitative analyses of GAG-derived disaccharides (DS and HS) by tandem mass spectrometry assay). DS=99.61 (ug/mL), HS=13.31 (ug/mL)-average DS and HS values of the normal population were 0.17 (±0.23) and 0.11 (±0.21), respectively

      CaseNotHPOs:

      CaseNotHPOFreeText:

      PreviouslyPublished: n/a

      Variant: c.1037 T > G (p.L346R)  +  c.1091C > T (p.T364M)

      ClinVar: 11925

      CAID: CA256126

      SupplementalData: n/a

    1. RESULTS

      NonHumanModel: Vervet Monkeys (Chlorocebus pygerythrus)

      GeneAlteration: PCR amplification and direct sequencing indicated that all of the vervet monkeys observed and one of the malbrouck monkeys had the TTR Ile122 allele, as opposed to the the other primates (including humans) that harbor the Met122 allele. Other than this variant, the sequence was identical to three other species of monkeys that did not demonstrate amyloidosis phenotypes including 95-98%, 93-94%, and 76-81% amino acid homologies to humans.

      ModelPhenotype: HP:0031327, HP:0003216, HP:0011675, HP:0012664 (Transthyretin cardiac amyloidosis, Generalized amyloid deposition, Arrhythmia, Reduced ejection fraction)

      ModelFreeText: Haphazardly arranged rigid amyloid fibrils in the heart, Increased cardiothoracic ratio, Increased plasma ANP concentrations

      HumanPhenotype: HP:0001627, HP:0011034 (Abnormal heart morphology, Amyloidosis)

      HumanFreeText: N/A

      ModelEvidence: Aged vervet monkeys were investigated for a naturally-occuring spontaneous systemic amyloidosis and accompanying phenotypes. PCR amplification and direct sequencing of these monkeys and others showed that the vervet monkeys alone harbored the Ile122 allele, as opposed to the more common Val122 allele in other primates and humans. Histopathological investigations showed cardiac amyloidosis and rigid amyloid fibers in the heart, identical to that observed in aged humans with the allele in question. These deposits were also found in other systems such as the gastrointestinal tract, adipose tissue, lung, tongue, and vascular walls, also mirroring the multiple locations they were found in humans. Immunoblotting confirmed that amyloid proteins extracted from the cardiac specimens reacted with anti-TTR antibody. Other cardiac symptoms were observed that mirror those in humans, such as arrythmia and reduced ehection fraction. Real-time PCR showed that these monkeys and humans shared the majority of TTR expression patterns. Recombinant monkey TTRs showed a greater tendency to dissociate to monomers under the influence of urea-mediated denaturation stress than recombinant TTR of the cynomolgus monkey, which had the Val122 allele. ThT-binding assay also showed a higher number of amyloid fibers in the recombinant than the cynomolgus.

      ModelVariant: NM_000371.4(TTR):c.424G>A (p.Val142Ile)

      ClinVar: 13426, https://www.ncbi.nlm.nih.gov/clinvar/variation/13426/

    1. In this study we analyzed 30 Italian MPS-I patients with different phenotypes (20 severe, 6 intermediate, 4 mild) in an attempt to recognize the mutational spectrum in our population and to identify major DNA alterations specific to our country.

      unable to annotate on PDF.

      Case#: Case #20, Lombardia region of Italy

      DiseaseAssertion: MPS1, intermediate

      FamilyInfo: n/a

      CasePresentingHPOs:

      CaseHPOFreeText: Diagnosis of was based on the clinical features, excessive urinary glycosaminoglycan excretion, and reduced IDUA activity in fibroblasts and/or leukocytes. Intermediate phenotype is described as an onset of symptoms between 1 and 6 years, variable survival, and mental retardation being absent or mild but never before 3 years of age

      CaseNotHPOs:

      CaseNotHPOFreeText:

      CasePreviousTesting: n/a

      GenotypingMethod: direct sequencing

      PreviouslyPublished: n/a

      Variant: R628X homozygous

      ClinVar: 550421

      CAID: CA2802462

      gnomAD: The highest population minor allele frequency in gnomAD v4.1.0. is 0.00005038 (2/39700 alleles) in the East Asian population, which is lower than the ClinGen Lysosomal Diseases VCEP’s threshold for PM2_Supporting (<0.00025), meeting this criterion (PM2_Supporting).

      SupplementalData: n/a

    1. As summarized in Table 2, the JPH2 genotype positive subjects were diagnosed with HCM at 27, 24 and 30 years with septal wall thicknesses of 22, 38 and 18 mm for each mutation respectively.

      Case 2: male, diagnosed at 24 yrs, 38mm septal wall thickness, no mutations in HCM associated genes, no family history

      HP:0002094, HP:0001681, HP:0001962, (dyspnea, angina pectoris, palpitations)

      Variant: NM_020433.4(JPH2):c.421T>C (p.Tyr141His)

      Clinvar ID: 30456

      https://www.ncbi.nlm.nih.gov/clinvar/variation/30456/

      ExAC Freq: 1.772e-05

    2. As summarized in Table 2, the JPH2 genotype positive subjects were diagnosed with HCM at 27, 24 and 30 years with septal wall thicknesses of 22, 38 and 18 mm for each mutation respectively

      Case 3: Female, diagnosed at 30 yrs, 18mm septal wall thickness, no mutations in HCM associated genes, no family history

      HP:0002094, HP:0006689, (dyspnea, bacterial endocarditis)

      Variant: NM_020433.4(JPH2):c.494C>T (p.Ser165Phe),

      ClinVar ID: 30457

      https://www.ncbi.nlm.nih.gov/clinvar/variation/30457/

      not in ExAC

    1. The variant p.(Arg628Ter) was not present in any UK or Ireland individuals but was identified in 14 individuals from other regions, accounting for 4.8% of alleles in all individuals. Supp. Figure S1

      14 individuals in the "other" population were found to have this variant and severe Hurler, but no additional information provided about genotype or phenotype since this study focused on the UK subset of the cohort.

    1. The aspartate-to-asparagine substitution in exon 5 of the α-tropomyosin gene (Asp175Asn, numbered according to Reference 15), which was previously identified in the proband, results from a guanine-to-adenine transition at nucleotide residue 579 (G579A)

      Case#: Proband_DBIII-2, 53 y.o., M

      CasePresentingHPOs: HP:0001712

      CaseHPOFreeText: Max LVWT 18 mm; LA size 40 mm; episode of sustained VT

      CaseNotHPOs:

      CaseNotHPOFreeText:

      CasePreviousTesting: None

      CaseMethod1: PCR amplification of TPM1 exon 5 followed by cycle sequencing

      CaseMethod2: STR polymorphisms to construct haplotypes

      CaseGenotypingMethod: PCR amplification of TPM1 exon 5 followed by cycle sequencing

      Variant: The nucleotide position 579 refers to that described in the initial cloning of the gene in 1988 (PMID: 3336363), but aligns to NM_001018005.2(TPM1):c.523G>A (p.Asp175Asn).

      ClinVar: ClinVar:12456

      CAID: CA018106

      gnomAD: Grpmax FAF = 7.900e-7, SNV: 15-63060899-G-A, gnomADv4_D175N

      CasePMIDs:

    1. SERPING1ID2704Ac.551-2A > Gnewdis AcExon 4 skipping (band B), use of cr: c.604 (band A)p.Gly184_Pro228delp.Ala185 Leufs*54 (NMD?)Normal exon inclusion (band A) *, exon 4 skipping (band B), exon 4 + 5 skipping (band C)p.Gly184_Pro228delp.Gly184_Ser296del

      Patient: ID270

      Variant: c.551-2A > G

      CAID: CA380696603

      Functional effect: Normal exon inclusion (band A) *, exon 4 skipping (band B), exon 4 + 5 skipping (band C). Observed in blood.

    2. SERPING1H024Ac.685 + 2_685 + 13delnewdis DExon 4 skipping (band C), use of cr: c.649 (band B), use of cr: c.685 + 132 (band A)p.Gly184_Pro228delp.Gly217_Pro228delp.Asp229Glyfs*11 (NMD?)Normal exon inclusion (band A) *, exon 4 skipping (band B), exon 4 + 6 skippingp.Gly184_Pro228delp.[Gly184_Pro228del;Ala297Glyfs*25] (NMD?)

      Patient: H02

      Variant: c.685 + 2_685 + 13del

      CAID: CA2580612034

      Functional effect: Normal exon inclusion (band A) *, exon 4 skipping (band B), exon 4 + 6 skipping. Observed in blood.

    1. two affected Italian siblings

      Case: Bolino Proband 3, reported at 14yo, symptom onset at 4yo

      CasePresentingHPOs: HP:0009053, HP:0008959, HP:0007181, HP:0009049, HP:0001284, HP:0010871, HP:0001337, HP:0001761, HP:0001765, HP:0012447, HP:0003383 (distal lower limb muscle weakness, distal upper limb muscle weakness, interosseous muscle atrophy, peroneal muscle atrophy, absent tendon reflexes, sensory ataxia, tremor, pes cavus, hammertoe, abnormal myelination, onion bulb formation)

      HPOsFreeText: interosseous muscle weakness, normal psychomotor development, sensory ataxia noted with tremor, normal autonomic function and superficial sensations, unremarkable general examination, routine laboratory tests normal, CSF exam normal, CMAPS absent from peroneal and median nerves, SNAPs absent from sural nerves. Light microscopy showed irregularities and outfoldings of myelin sheath

      CountryOrigin: Italy

      FamilyInfo: non-consanguineous parents

      PreviouslyPublished: 10673338, 8195799

      GenotypingMethod: PCR of genomic DNA, establishment of MTMR2 genomic structure, cDNA sequence aligned with partial genomic sequence from PAC clone CMB9-9116, available family members analyzed and segregation of variant with disease confirmed in pedigree

      Variant: NM_016156.5(MTMR2):c.1444C>T (p.Gln482Ter), homozygous

      ClinVar: 6234, https://www.ncbi.nlm.nih.gov/clinvar/variation/6234/

      gnomAD: 0.000003988, https://gnomad.broadinstitute.org/variant/11-95574816-G-A

    1. The patient in family 2 who also had the Hurler phenotype was heteroallelic for the novel missense mutation I270S and the previously reported nonsense mutation R628X.

      Article is a PDF, so annotating here.

      Case#: Family 2, Proband 3, Tunisia (Mednine), female, death at 5yo

      DiseaseAssertion: MPS1, Hurler

      FamilyInfo: Offspring of consanguineous marriage between first cousins. Variants were said to be found in parents as well. Mother had I270S and father had R628X

      CasePresentingHPOs:

      CaseHPOFreeText: Leukocyte IDUA activity= <0.1% of normal

      CaseNotHPOs:

      CaseNotHPOFreeText:

      CasePreviousTesting: n/a

      GenotypingMethod: PCR sequencing with possible confirmation by restriction enzyme digestion on a second PCR product.

      PreviouslyPublished: n/a

      Variant: c.1882C>T p.(R628X) and c.809T>G p.(I270S) compound heterozygous. Confirmed in trans. Also has the following polymorphisms: R105Q, N181N, T410T, V454I, IVS8+2573insC.

      ClinVar: 550421

      CAID: CA2802462; CA355962322

      gnomAD: The highest population minor allele frequency in gnomAD v4.1.0. is 0.00005038 (2/39700 alleles) in the East Asian population, which is lower than the ClinGen Lysosomal Diseases VCEP’s threshold for PM2_Supporting (<0.00025), meeting this criterion (PM2_Supporting).

      SupplementalData: n/a

    1. c.1705+1G>T p.(V556Qfs*40) Intron 17 CS061312

      Case#: n/s

      DiseaseAssertion: bilateral optic atrophy

      FamilyInfo:

      CasePresentingHPOs:

      CaseHPOFreeText:

      CaseNotHPOs:

      CaseNotHPOFreeText:

      GenotypingMethod: Genetic testing of the OPA1 gene was initially performed by a combined analysis using either single-strand conformation polymorphism or denaturing high performance liquid chromatography followed by Sanger sequencing to validate aberrant bands or melting profiles. The presence of copy number variations was assessed using multiplex ligation-dependent probe amplification. Since 2012, genetic testing was based on next-generation sequencing platforms.

      PreviouslyPublished: likely since S. Schimpf is an author, patients were sent to the same German institution (Institute for Ophthalmic Research in Tübingen-same institution S.Schimpf is associated with), some patients came from Italian referring centers (proband from Carelli et al was said to be Italian), this is a retrospective study and the paper states "many variants have already been described and published by us"

      Variant: c.1705+1G>T p.(V556Qfs*40)

      CAID: CA10576007

      SupplementalData:

    1. Subject 1

      Case# Subject 1, M, 5mo died, British

      CasePresentingHPOs HP:0001319, HP:0003324, HP:0008872, HP:0001531, HP:0002020, HP:0000407, HP:0002910, HP:0002151, HP:0002490, HP:0003198, HP:0003200, HP:0003688, HP:0002098, HP:0003348 (Neonatal hypotonia, Generalized muscle weakness, Feeding difficulties in infancy, Failure to thrive in infancy, Gastroesophageal reflux, Sensorineural hearing impairment, Elevated transaminases, Increased serum lactate, Increased CSF lactate level, Myopathy, Ragged red muscle fibers, Cytochrome C oxidase-negative muscle fibers, Respiratory distress, Elevated blood alanine)

      HPOFreeText: Hypotonic and weak soon after birth, had difficulty feeding, slow weight gain and gastro-esophageal reflux, confirmed sensorineural deafness after neonatal screen. Lateral skull X-ray showed fused sutures, supporting possible craniosynostosis. Died of 5.5 months of respiratory distress after rhinovirus bronchiolitis.

      CaseNotHPOs HP:0045045 (Elevated acylcarnitine)

      CasePreviousTesting Alanine transaminase (439 U/L; normal range 4–45 U/L), blood lactate (5 to 10 mmol/L; normal range 0.7–2.1 mmol/L). Screened panel of known mitochondrial disease genes. Analysis of mtDNA and mtDNA copy number were normal in patient muscle cells, thus excluding mtDNA rearrangements and point mutations.

      CaseMethod1 WES

      CaseMethod2 Sanger

      CaseGenotypingMethod WES confirmed with Sanger in patient and parents to confirm in trans

      Variant (1) NM_017819.3(TRMT10C):c.542G>T (p.Arg181Leu), (2) NM_017819.3(TRMT10C):c.814A>G (p.Thr272Ala)

      ClinVar (1) 224316, (2) 224317

      gnomAD (1) 0.0003508(Latino), 0.0001121(Total) - no homozygotes listed (2) n/a

      VariantEvidence n/a

      CaseAddInfo non-consanguineous, healthy older sister, c.542G>T variant in ExAC (10/120,324 alleles) and ESP6500 (1/11,824 alleles), c.814A>G was not in ExAC, ESP6500 or COSMIC

      CaseAddPMIDs n/a

    1. RESULTS

      NonHumanModel: Mouse (Mus musculus)

      GeneAlteration: CRISPR-Cas9 gene editing was used to produce gene-edited mouse zygotes. This was accomplished by designing a guide RNA (gRNA) with the CRISPR design tool and microinjecting the gRNA complex along with Cas9 mRNA and a ultramer repair template including the single deletion into mouse zygotes. This directs double-strand breaks in the genome with homology directed repair causing the precise genome edit necessary. These were injected into psuedo-pregnant C57BL/6J mice. After birth, tail DNA was genotyped via PCR and Sanger seuqencing to confirm the mutation. One heterozygous 525delT mouse was crossed and the offspring backcrossed onto DBA/2J background until the F5 generation confirmed homozygous for the severe LTBP4 allele which results in a more severe disease progression. RT-PCR confirmed the presence of the deletion and loss of γ-sarcoglycan was confirmed via immunoblot analysis and immunofluorescence microscopy.

      ModelPhenotype: HP:0003202, HP:0031237, HP:0030951, HP:0003713, HP:0011987, HP:0003557, HP:0003236, HP:0003323, HP:0005957 (Skeletal muscle atrophy, Internally nucleated skeletal muscle fibers, Skeletal muscle fibrosis, Muscle fiber necrosis, Ectopic ossification in muscle tissue, Increased variability in muscle fiber diameter, Progressive muscle weakness, Breathing dysregulation)

      ModelFreeText: Decreased cross-sectional area of myofibers, Increased immune infiltrate, Increased dye uptake into compromised myofibers

      HumanPhenotype: HP:0003202, HP:0030951, HP:0003713, HP:0003236, HP:0003323, HP:0005957 (Skeletal muscle atrophy, Skeletal muscle fibrosis, Muscle fiber necrosis, Elevated serum creatine kinase, Progressive muscle weakness, Breathing dysregulation)

      HumanFreeText: N/A

      ModelEvidence: This model has many positive aspects compared to the default mouse model, although it also has some challenges to overcome. In terms of the generation, CRISPR-Cas9 gene editing via HDR is a relatively simple way to modify the genome as needed and create only the variant of interest while leaving the rest untouched. This results in a knock-in with a reasonable assurance that whatever phenotypes are displayed stem solely from the change in the SGCG gene. Specifically the muscle atrophy, elevated serum creatine kinase, progressive weakness (half the strength of controls at 4 months), and signifiacntly increased muscle fibrosis/necrosis are all hallmarks of the human LGMD presentation and are recapitulated here. However, the presence of a known muscular dystrophy-modifying background raises the question of whether some of these phenotypes would not be seen in a mouse with the C57BL/6J background. Unfortunately this is not answered in the paper, so it introduces some doubt as to the total validity of the results.

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

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

    1. In 30 families, either one or both of the mutations were not identified, which accounted for 25.9% of the total alleles. Therefore, all 14 exons of the alpha-L-iduronidase gene were screened in these patients and 23 different sequence changes were found, 17 of which were previously unknown. The novel sequence changes include 4 deletions (153delC, 628del5, 740delC, 747delG), 5 nonsense mutations (Q60X, Y167X, Q400X, R619X, R628X), 6 missense mutations (C205Y, G208V, H240R, A319V, P496R, S633L), a splice site mutation (IVS12+5g>a), and a rare polymorphism (A591T)

      article is a PDF, so annotating here.

      Case#: Beesley Families 3 and 4, Middle Eastern

      DiseaseAssertion: MPS1, Hurler

      FamilyInfo: said to be from different families, but from the same region

      CasePresentingHPOs:

      CaseHPOFreeText: reduced/absent enzyme activity. IDUA enzyme activity in leukocytes= range from 0 to 2.47 nmol/h/mg protein (reference range: 28–92 nmol/h/mg protein) for the 85 patients in study, but no individual activity provided. No individual phenotype information given.

      CaseNotHPOs:

      CaseNotHPOFreeText:

      CasePreviousTesting: n/a

      GenotypingMethod: intron/exon boundaries of the IDUA gene were analysed by PCR, SSCP and DNA sequencing

      PreviouslyPublished: n/a

      Variant: p.R628X homozygous

      ClinVar: 550421

      CAID: CA2802462

      gnomAD: The highest population minor allele frequency in gnomAD v4.1.0. is 0.00005038 (2/39700 alleles) in the East Asian population, which is lower than the ClinGen Lysosomal Diseases VCEP’s threshold for PM2_Supporting (<0.00025), meeting this criterion (PM2_Supporting).

      SupplementalData: n/a

    1. family 2, a deletion variant, c.371delA, was found in theaffected male IV-2 (Fig. 1B, E), causing a frameshift leading to atruncated putative protein p. Lys124Serfs*10

      Case#: Ciammola_Family 1_Proband IV-2

      Demographics: Male, 49y at report

      CasePresentingHPOs: HP:0002378, HP:0002067, HP:0002172, HP:0002322, HP:0000729, HP:0100543, HP:0000338, HP:0002063, HP:0002067, HP:0002174,

      Onset of bradykinesia and postural instability at 44yo. Rest tremor developed in the right hand and then spread bilaterally. Gait was slow. Fronto-subcortical involvement pattern was seen on neurological assessment.

      CaseNotHPOs:

      CasePreviousTesting:

      CaseMethod1:

      CaseMethod2:

      CaseGenotypingMethod:

      Variant: NM_171998.4:c.370del (Lys124SerfsTer10)

      ClinVar:

      CAID: CA658795322

      gnomAD: NR

      VariantEvidence: The proband was hemizygous for the frameshift variant, Lys124SerfsTer10, but showed mosaicism. Segregation analysis in the family revealed that the variant was de novo and proband cDNA analysis showed normal and mutant transcripts in a 1:1 ratio, and this was also confirmed in oral mucosa cells and urine. Immunoblotting of HeLa cells transfected with variant RAB39B revealed complete loss of function.

      CaseAddInfo:

      CasePMIDs:

    2. family 1, a frameshift variant, c.137dupT, was found in theaffected siblings II-1 and II-3 (Fig. 1A, C), resulting in a putativepremature stop codon after 91 aminoacids from the start codon(p.Ser47Leufs*44).

      Case#: Ciammola_Family 1_Proband II-3

      Demographics: Male, 67y

      CasePresentingHPOs: HP:0002378, HP:0002174, HP:0030186, HP:0002135, HP:0002322, HP:0001288, HP:0002067, HP:0001276,

      Developmental milestones were unremarkable, but experienced severe learning disabilities at primary school. Proband developed a postural tremor in both hands at 11yo. At 44y, he was diagnosed with essential tremor in both hands and CT scan revealed left basal ganglia calcification. He developed progressive rest tremor in right hand and progressive gait difficulty from 62yo. Bradykinesia at finger tapping, slow gait, decreased arm swing, especially on the right side, and good response to L-dopa therapy were noted. Mild-moderate front-subcortical involvement pattern

      CaseNotHPOs:

      CasePreviousTesting: No pathogenic variants were detected in GBA, LRRK2 exons 29-30-31-35-41, PRKN, PINK1, DJ-1, ATP13A2, FBXO7, PLA2G6, DNAJC6 and SYNJ1 analyzed by Sanger sequencing. No deletion/duplications in PRKN analyzed by quantitative PCR were detected.

      CaseMethod1: Sanger

      CaseMethod2:

      CaseGenotypingMethod: RAB39B gene was sequenced.

      Variant: NM_171998.4:c.137dup

      ClinVar:

      CAID: CA658795323

      gnomAD: NR

      VariantEvidence: The proband was hemizygous for the frameshift variant, Ser47LeufsTer44. Immunoblotting in HeLa cells transfected variant RAB39B revealed absence of RAB39B protein, indicating complete loss of function due to the variant.

      CaseAddInfo:

      CasePMIDs:

    1. KMP 8

      Case#: KMP 8, male, 62 yrs, East Slovakia

      DiseaseAssertion: HCM

      FamilyInfo: n/a

      CasePresentingHPOs: n/a

      CaseHPOFreeText: symptomatic; LVOTO yes; LVEF 60%; ECG; echocardiography;

      CaseNotHPOs: n/a

      CaseNotHPOFreeText: 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. KMP7

      Case#: KMP 7, male, 36 yrs, East Slovakia

      DiseaseAssertion: HCM

      FamilyInfo: n/a

      CasePresentingHPOs: n/a

      CaseHPOFreeText: symptomatic; LVOTO yes; LVEF 60%; ECG; echocardiography;

      CaseNotHPOs: n/a

      CaseNotHPOFreeText: 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

    1. 2Kuwait1.5M00.54p.Arg628* (c.1882C>T)p.Arg628*b,2 (c.1882C>T)

      Case#: Patient 2, Kuwait, 1.5yo at report, male

      DiseaseAssertion: MPS1

      FamilyInfo: n/a

      CasePresentingHPOs:

      CaseHPOFreeText: IDUA activity on DBS= 0 nmol/21 h*punch

      CaseNotHPOs:

      CaseNotHPOFreeText:

      CasePreviousTesting: n/a

      GenotypingMethod: exon-specific PCR amplification of individual exons together with short flanking intronic sequences, followed by conventional Sanger sequencing

      PreviouslyPublished:

      Variant: p.Arg628* (c.1882C>T) homozygous

      ClinVar: 550421

      CAID: CA2802462

      gnomAD: The highest population minor allele frequency in gnomAD v4.1.0. is 0.00005038 (2/39700 alleles) in the East Asian population, which is lower than the ClinGen Lysosomal Diseases VCEP’s threshold for PM2_Supporting (<0.00025), meeting this criterion (PM2_Supporting).

      SupplementalData: n/a

    1. Twelve human C1 inhibitor P1 variants were constructed by site-directed mutagenesis of the codon for arginine 444 and were expressed in COS-1 cells to analyze the functional properties.

      Transiently transfected COS-1 cells were assayed for the presence of C1 inhibitor antigen with the mAb RII RIA (21). Expression levels of all P1 variants were comparable to wild type. . Lysates of transfected COS cells did contain recombinant C1 inhibitor P1 stop antigen, but in substantially lower amounts than the other P1 variants. This indicates that the premature stop codon results in an aberrantly folded protein, which is degraded intracellularly.

      P1 His retained the ability to complex with target proteases, but considerably higher amounts of this variant was required compared to recombinant wild-type C1 inhibitor.

      P1 Cys was shown to be nonfunctional in kinetic analyses.

      Conclusion: P1-Cys variant is nonfunctional toward Cls, beta-factor XIIa, kallikrein, and plasmin. The low activity of P1-His toward Cls is probably not physiologically relevant.

      Variants: c.1396C>T; c.1397G>A

      CAIDs: CA116521; CA116519

    1. proband

      FamilyName: Kar 2018 Family 1

      FamilyPresentingHPOs: HP:0001249, HP:0000508, HP:0010442

      FamilyNotHPOs:

      CountryOrigin: India

      Ethnicity:

      Race: Asian

      FamilyPreviousTesting: Authors stated that homozygosity mapping did not identify any significant CNVs. Loss of heterozygosity (greater than 1kb) were observed over all affected siblings in shromosome 2, 7, 10, and 14. The Chromosome 2q had a 11Mb region with 141 genes, of which none were associateed with ID, ptosis, and polydactyly together.

      FamilyMethod1:

      FamilyMethod2:

      FamilyGenotypingMethod: Homozygosity mapping, using SNP array analysis ( Illumina Human-CytoSNO-12v2.1. DNA) on the entire family (including parents), and exome sequencing in all the siblings. All mutations were confirmed by Sanger sequencing in the proband, parents, siblings (affected and unaffected) and a control was used. WES identified mutations in the UGT1A7 gene (c.654A>C) within the shared chromosome 2 region, as well as ARMC( (c.879G>A). They also found mutations in the gene ZFPM1 (c.1331_1339delinsCCC), but this was not within any shared region of homozygosity between the siblings. Neither UGT1A7 or ZFPM1 is associated with a disease/ phenotype per OMIM.

      Affected: 3

      Unaffected: 1

      Segregations:

      PublishedLOD: n/a

      eLOD: 1.32

      AddSegregationInfo: Family is consanguineous.

      ProbandLabel: Kar 2018 Family- II:1, male

      Variant: NM_025139.5(ARMC9):c.879G>A (p.Thr293=)

      ClinVar: 522606

      gnomAD: MAF (Ash-JEw)= 0.0001022, no homozygotes

      FamilyAddInfo:

      FamilyPMIDs:

      CasePresenting HPOs: HP:000148, HP:0000494, HP:0000316, HP:0000311, HP:0000218, HP:0030084, HP:0001182, HP:0006369, HP:0002761, HP:0005880, HP:0006253, HP:0004322, HP:0007068, HP:0002419

      VariantEvidence: The ARMC9 c.879G>A synonymous mutation is the last base in exon 9 (of 21 total exons) and is predicted to alter splicing. ARMC9 was transcribed into the pCAS2 minigene system and expressed in COS7 cells. RT-PCR of the transfected cells showed skipping of exon 9 in the mutant (Mt) cells compared to ARMC9 wildtype (Wt) cells that retained exon 9 (Figure 2). Sanger sequencing of the ARMC9-pCAS_Mt vector showed a 99 base pair deletion of exon 9 (Supplementary Figure 1), which is a loss of 33 amino acids encoded by exon 9. Exon 9 of ARMC9 encodes part of the ARM Domain 1 which is highly conserved among several speciies. Structural modeling indicates that the loss of the 33 amino acids (aa261-293) would critically disrupt the structure of ARMC9 ( Figure 3).

    1. c.5426_5427dupAGQ1810S…K1830X34310/1c.2193C→TR692X15310/1

      Case# Kolehmainen_Proband 3

      CasePresentingHPOs HP:0001263, HP:0001875, HP:0001135, HP:0011504, HP:0000252, HP:0001290, HP:0001999

      CaseNotHPOs

      CasePreviousTesting None

      CaseMethod1 Sanger sequencing

      CaseMethod2

      CaseGenotypingMethod Sanger sequencing of COH1

      Variant1 c.5426_5427dupAG

      ClinVar1 56673

      gnomAD1: Not found

      Variant2 NM_017890.4(VPS13B):c.2074C>T (p.Arg692Ter)

      Published as c.2193C>T

      ClinVar2 56650

      gnomAD2 0.000004063 (African)

      VariantEvidence Compound heterozygous individual. Two variants in trans, both truncating. These variants have been reported in heterozygous state in Family 8 described by Seifert et al (PMID: 16648375) and in two different individuals (in heterozygous state) by El Chehadeh et al. (PMID: 20656880).

      CaseAddInfo Individual reported in Fryns et al

      CasePMIDs 8832131

    1. a novel truncating TUBA4A variant, p.H393Pfs*19 (chr2:220115243_220115244insG, c.1177_1178insC), in a familial ALS proband who also harboured the SOD1 p.E133V variant (chr21:33040827A>T, c.401A>T).

      Case#: Li 2018 fALS H393Pfs*19, Chinese

      MonDO: MONDO:0005144 for fALS

      CasePresentingHPOs: HP:0007354

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

      Variant: NM_006000.3(TUBA4A):c.1177dup (p.His393ProfsTer19)

      CAID: CA2018007640

      CaseAddInfo: This variant failed to cosegregate with affected family members. This proband also carried the SOD1 p.E133V variant (chr21:33040827A>T, c.401A>T).

    1. g

      CaseP550: Male, 8 yrs onset,

      CasePresentingHPOs: HP:0002078, HP:0000639, HP:0007340, HP:0007210, HP:0002495, HP:0001760 (Truncal ataxia, Nystagmus, Lower limb muscle weakness, Lower limb amyotrophy, Impaired vibratory sensation, Abnormal foot morphology)

      HPOsFreeText: N/A

      CaseNotHPOs: HP:0000648, HP:0001639, HP:0002015, HP:0001260 (Optic atrophy, Hypertrophic cardiomyopathy, Dysphagia, Dysarthria)

      NotHPOsFreeText: Not wheelchair-bound

      CaseAddInfo: N/A

      CasePreviousTesting: 30.9% fratraxin protein levels

      CaseGenotypingMethod: See Group

      Variant1: FXN, (GAA)n REPEAT EXPANSION, IVS1

      ClinVar: 561195, https://www.ncbi.nlm.nih.gov/clinvar/variation/561195/

      gnomAD: Not in gnomAD

      Variant2: NM_000144.5(FXN):c.157del (p.Arg53fs)

      CAID: 3985, https://www.ncbi.nlm.nih.gov/clinvar/variation/3985/

      gnomAD: 0.000 MAF

    2. e

      CaseP840: Female, 11 yrs onset,

      CasePresentingHPOs: HP:0002078, HP:0002015, HP:0001152, HP:0000639, HP:0007340, HP:0007210, HP:0002495 (Truncal ataxia, Dysphagia, Saccadic smooth pursuit, Nystagmus, Lower limb muscle weakness, Lower limb amyotrophy, Impaired vibratory sensation)

      HPOsFreeText: Wheelchair-bound 25 yrs

      CaseNotHPOs: HP:0000648, HP:0000365, HP:0001760, HP:0001639 (Optic atrophy, Hearing impairment, Abnormal foot morphology, Hypertrophic cardiomyopathy)

      NotHPOsFreeText: N/A

      CaseAddInfo: N/A

      CasePreviousTesting: 19.9% fratraxin protein levels

      CaseGenotypingMethod: See Group

      Variant1: FXN, (GAA)n REPEAT EXPANSION, IVS1

      ClinVar: 561195, https://www.ncbi.nlm.nih.gov/clinvar/variation/561195/

      gnomAD: Not in gnomAD

      Variant2: NM_000144.5:c.101del (p.Pro35HisfsTer?)

      CAID: CA193369020, http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA193369020

      gnomAD: Not in gnomAD

    1. Mucopolysaccharidosis type I: identification of novel mutations that cause Hurler/Scheie syndrome in Chinese families.

      Unable to annotate on PDF.

      Case#: Lee-Chen Patient W2, 10yo, male, Chinese

      DiseaseAssertion: MPS1

      FamilyInfo: Variant was paternally inherited and the mother was no mentioned, but it was said that there may have been a "de novo deletion or gene conversion event" that resulted in apparent homozygosity

      CasePresentingHPOs: HP:0004322, HP:0000280, HP:0011842

      CaseHPOFreeText:

      CaseNotHPOs: HP:0001249

      CaseNotHPOFreeText:

      PreviouslyPublished: n/a

      Variant: T364M homozygous

      AdditionalVariants: Proband is also homozygous for polymorphisms (A314, T388, T410, and R489) as well as R105Q, A361T, and V454I

      ClinVar: 11925

      CAID: CA256126

      SupplementalData: n/a

    1. Patient NIJ

      MonDO: MONDO:0032706

      Case: Patient NIJ. 46 year old Dutch/Egyptian female onset of gait difficulties at age 34 with progressive worsening. Analysis of the maternal DNA revealed that she carries the p.Gln316* mutation, but not the frameshift mutation, indicating that the mutations in the proband are on opposite alleles.

      DiseaseAssertion: Cerebellar ataxia

      FamilyInfo:

      CasePresentingHPOs: HP:0001288, HP:0007979, HP:0008003, HP:0007338, HP:0001251, HP:0002064, HP:0006895, HP:0001348 (Gait disturbance, Gaze-evoked horizontal nystagmus, Jerky ocular pursuit movements, Hypermetric saccades, Ataxia, Spastic gait, Lower limb hypertonia, Brisk reflexes

      CaseHPOFreeText: Difficulty writing, cerebellar dysarthria, downgoing plantar responses, ataxia on finger chase and heel-shin slide, Mild spastic paraplegia Cervical dystonia

      CasePreviousTesting: No weakness. Normal sensory examination. An MRI brain scan revealed mild cerebellar atrophy. Ophthalmological examinations were normal. Nerve conduction studies and EMG did not show evidence of a peripheral neuropathy. Laboratory testing including vitamin E, metabolic screening, albumin, cholesterol, alpha-fetoprotein, lactate, acanthocytes, copper, ceruloplasmin, and coeliac screen was normal or negative. Genetic testing for Friedreich, spinocerebellar ataxias (SCAs) 1, 2, 3, 6, 12, 14 and 17, dentatorubral-pallidoluysian atrophy, autosomal recessive spastic ataxia of Charlevoix-Saguenay and SPG7 were negative.

      GenotypingMethod: Exome sequencing. Sanger sequencing was performed for confirmation of the variants and for segregation analyses using standard techniques. Altogether, 117 708 variants (single nucleotide variants and small deletions/insertions/indels) were detected. Initial filtering for a gene panel of movement disorders revealed no mutations.Variants were filtered for variant type, rarirty (MAF <0.5%) and conservation (>0.75, phyloP). Paternal DNA unavailable.

      MultipleGeneVariants:

      (1) GeneName: GDAP2

      (1) Variant: c.946C>T; p.(Gln316*)

      (1) ClinVarID or CAID: CA1031513

      (1) gnomAD: Total AF 0.00006711 (gnomAD v4.1, https://gnomad.broadinstitute.org/variant/1-117896840-G-A?dataset=gnomad_r4)

      (2) GeneName: GDAP2

      (2) Variant: c.1305dup p.(Ser436fs*36)

      (2) ClinVarID or CAID: CA913189981

      (2) gnomAD: Total AF 0.000001301, gnomAD v4.1 (https://gnomad.broadinstitute.org/variant/1-117878149-A-AC?dataset=gnomad_r4)

    1. Initially, high-resolution homozygosity mapping was performed by genotyping both affected individuals, II-2 and II-5, of family 1 using the Affymetrix GeneChip Human Mapping 250K Nsp SNP array. Analysis was performed as described7 and a large block of 98.6% homozygosity shared by both siblings was identified on chromosome 18 between rs1944983 and rs2194631, which contains several SERPIN genes

      Family 1: individuals II-2 and II-5 underwent homozygosity mapping which resulted in the finding of homozygous regions on chromosome 18 between rs1944983 and rs2194631 in both individuals - This region carries some SERPIN genes

    1. brother, individual 2 (III-2), has a similar but milder phenotype

      Case#: Family 1, Individual III-2, Male, 23 yo, dx at 5 years

      CasePresentingHPOs: HP:0002355, HP:0001260, HP:0001251, HP:0025402, HP:0000640, HP:0002544, HP:0012036, HP:0002451, HP:0007256

      CaseNotHPOs: HP:0100543, HP:0012547, HP:0007108

      CasePreviousTesting: MRI

      CaseGenotypingMethod: combination of homozygosity mapping and WES, haplotype analysis

      Variant: NM_177400.2(NKX6-2):c.121A>T (p.Lys41Ter)

      ClinVar: 430622, https://www.ncbi.nlm.nih.gov/clinvar/variation/430622/

      gnomAD: n/a

      VariantEvidence: fibroblast cell line used to determine variant as null.

      CaseAddInfo: Walked at 12mo, but at 8yo required walking assistance. Disease did not significantly progress until teen years.

      CasePMIDs:

    1. a new patient

      CaseJO: Female, 56 yrs onset

      CasePresentingHPOs: HP:0002326, HP:0003236, HP:0001712, HP:0003458, HP:0012548, HP:0030197, HP:0003557, HP:0031237 (Transient ischemic attack, Elevated serum creatine kinase, Left ventricular hypertrophy, EMG: myopathic abnormalities, Fatty replacement of skeletal muscle, Fatigable weakness of skeletal muscles, Increased variability in muscle fiber diameter, Internally nucleated skeletal muscle fibers)

      HPOsFreeText: N/A

      CaseNotHPOs: HP:0030972, HP:0030177 (Abnormal systemic blood pressure, Abnormal nerve conduction study)

      NotHPOsFreeText: N/A

      CaseAddInfo: Proband is homozygous for this variant

      CasePreviousTesting: No family history suggestive of neuromuscular or cardiac disorders

      CaseGenotypingMethod: Leukocyte-derived DNA was examined via NGS sequencing with 265 genes and shown to carry a homozygous nonsense mutation in TRIM63. TRIM54 was examined and no variants were found.

      Variant: NM_032588.3(TRIM63):c.739C>T (p.Gln247Ter)

      ClinVar: 222849, https://www.ncbi.nlm.nih.gov/clinvar/variation/222849/

      gnomAD: 0.008100, https://gnomad.broadinstitute.org/variant/1-26384973-G-A

    1. Patient 3

      Case3: Female, Birth onset

      CasePresentingHPOs: HP:0001558, HP:0008947, HP:0002643, HP:0011470, HP:0001270, HP:0001349, HP:0001488, HP:0007941, HP:0010628, HP:0003327, HP:0003722, HP:0003391, HP:0030051, HP:0002938, HP:0002943, HP:0008081, HP:0003273, HP:0012785, HP:0012432, HP:0010300, HP:0001611, HP:0002792, HP:0003458, HP:0003557, HP:0003803, HP:0003715 (Reduced fetal movements, Infantile hypotonia, Neonatal respiratory distress, Nasogastric tube feeding in infancy, Motor delay, Facial diplegia, Bilateral ptosis, Limited extraocular movement, Facial muscle weakness, Axial muscle weakness, Neck flexor weakness, Gowers sign, Tip-toe gait, Lumbar hyperlordosis, Thoracic scoliosis, Pes valgus, Hip contracture, Flexion contracture of finger, Chronic fatigue, Abnormally low-pitched voice, Nasal voice, Reduced vital capacity, EMG: myopathy, Increased fiber size variation, Type 1 muscle fiber predominance, Myofibrillar myopathy)

      HPOsFreeText: Nocturnal ventilation started at 2 yrs, Tracheostomy performed, Hypermobility of the upper extremities, Spinal contracture, Intermyofibrillar network was coarse and irregular, Cap structures, Jagged z-lines

      CaseNotHPOs: HP:0001627, HP:0040081, HP:0040129 (Cardiac abnormality, Abnormal levels of creatine kinase in blood, Abnormal nerve conduction)

      NotHPOsFreeText: 24-hour Holter-EKG recording and cardiac ultrasound were normal

      CaseAddInfo: Healthy parents and 3 healthy siblings, Mutation is de novo

      CasePreviousTesting: N/A

      CaseGenotypingMethod: PCR and sequencing analysis were performed on genomic DNA, specifically the entire coding sequence of TPM2. TPM2 was sequenced in both parents and all siblings with negative results.

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

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

      gnomAD: Not in gnomAD

    1. Family 1

      FamilyName: Family 1

      FamilyPresentingHPOs: HP:0000685

      FamilyNotHPOs:

      CountryOrigin: Pakistan

      Ethnicity: Pakistani

      Race: Asian

      FamilyPreviousTesting:

      FamilyMethod1: WES

      FamilyMethod2:

      FamilyGenotypingMethod: Whole exome sequencing identified 27 regions of homozygosity for Family 1, specifically from WES of the proband IV:3 (Supplemental Table 3).

      Affected: 2

      Unaffected: 1

      Segregations: 1

      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:

      ProbandLabel: Family 1-IV:3, female

      Variant: NM_033068.2(ACP4):c.746C>T (p.Pro249Leu)

      Homozygous

      ClinVar: 375694

      gnomAD: n/a

      FamilyAddInfo: WES identified 27 regions of homozygosity for Family 1 (Supplemental Table 3).

      Variant deposited into the Leeds AI repository in LOVD, variant #0000000186.

      FamilyPMIDs:

      CasePresentingHPOs: Hypermineralization of dentine

      CaseNOTHPOS: HP:0010299

      CasePreviousTesting: n/a

      CaseGenotypingMethod: WES identified 27 regions of homozygosity in which 2 genes, other than ACPT were flagged. These 2 genes/ variants are ZNF534:c.118A>C(p.N40H) (gnomAD AF= 0.00025 62 hets, 1 homo) and TCOF1:c.431C>T(p.T144I) (gnomAD AF= 8.12E-4, 2 hets, no homozygous; Gene Associated with Treacher collins syndrome). These variants segregated with disease along with the ACPT variation.

      VariantEvidence: n/a

    1. HCM family including 5 generations and 74 members was studied. Two-dimensional echocardiography was performed to diagnose HCM.

      FamilyName: Guo_Family

      FamilyPresentingHPOs: HP:0001712

      FamilyPresentingHPOFreeText:

      FamilyNotHPOs:

      FamilyNotHPOFreeText:

      CountryOrigin: China

      Ethnicity:

      Race:

      FamilyPreviousTesting: transthoracic echocardiography, LV wall thickness and LV dimensions were measured perpendicular to the long axis of the left ventricle by M-mode imaging and 2-dimensional echocardiography, pulsed-wave, continuous-wave, and color Doppler were used as necessary for accurate definitions of obstruction

      FamilyMethod1: WGS

      FamilyMethod2: Sanger

      FamilyGenotypingMethod: WGS of an immediate family member from each generation

      Affected: 25

      Unaffected:

      Segregations:

      PublishedLOD:

      eLOD:

      AddSegregationInfo:

      ProbandLabel: Guo III:15

      Variant: c.505A>C in exon 4, L169G

      ClinVar or CAID: CA16609625

      gnomAD: not in gnomAD

      FamilyAddInfo: 12 individuals carried MYH7-A719H, and 16 carried MYOZ2-L169G. Among the 12 subjects who were clinically diagnosed with HCM, 7 carried both MYH7-A719H and MYOZ2-L169G, 4 had only MYH7-A719H, and 1 did not possess either mutation. Those who carried only the MYH7 mutation had mild LV hypertrophy or normal heart function and morphology, and all experienced only chest discomfort or no symptoms at all after activities. Ten of the subjects who carried only the MYOZ2 mutation showed no LV hypertrophy, abnormal ECG or echocardiographic findings, or discomfort. The 7 patients with both MYH7-A719H and MYOZ2-L169G had more serious symptoms, commonly complaining of palpitation and dyspnea. During the follow-up period, 1 of these subjects experienced SCD, and another suffered from myocardial infarction without obvious hyperlipidemia. Compared with subjects with only MYH7-A719H or MYOZ2-L169G mutation, patients with both the MYH7-A719H and MYOZ2-L169G mutations had the largest median left atrial diameter (Kruskal–Wallis test, P = 0.015) and the highest frequency of cardiovascular events (Fisher exact test, P = 0.007). The MYOZ2-L169G mutation alone was not found to be pathogenic, but it did appear to play a modifying role in HCM.

      FamilyPMIDs:

    1. Anti-lipoate antibody detected strongly decreased levels of the expected lipoylated E2 subunits of α-oxoacid dehydrogenases in fibroblasts of individuals P1 and P2, whereas normal bands were seen in the control (Figure 3A). In fibroblasts of an individual with LIPT1 deficiency,7 these bands were undetectable (Figure 3A). Moreover, immunofluorescence staining examined by a confocal microscopy showed absence of protein lipoylation in P1 and P2 fibroblasts (Figure 3B).

      ExperimentName: Reduced E2-lipoylation in LIPT2 patient cells

      PatientCell: Fibroblast (not specified where it was derived)

      GeneFunction: GO:0009249

      GeneAlteration: Patient fibroblasts from P1 harboring the LIPT2 c.89T>C(p.Leu30Pro) and c.377T>G(Leu126Arg) and fibrobalsts from P2 harboring the c.377T>G(Leu126Arg) and c.314T>G(p.Leu105Pro) were used in this assay.

      FunctionalEvidence: Patient fibroblasts both from P1 and P2, both with compound heterozygous mutation in LIPT2 that represent 3 different variants (one overlaps), were assayed for E2 lipoylation in PDHc and alpha-KGDHc (Figure 3), compared to control cells. The assay indicates reduced lipoylation of both PDHc and alpha KGSHc compared to controls both by western blot (Figure 3A) and immunocytochemistry (figure 3B). the reduction in lipoylation was consistent with that observed in patients with LIPT1 mutations, indicating a role for LIPT2 in lipoylation.

      FAVariants:<br /> 1) CA224979286 (NM_001144869.1:c.377T>G(p. Leu126Arg))

      2) CA224979330 (NM_001144869.1:c.89T>C(p.Leu30Pro))

      3) CA381976642 (NM_001144869.1:c.314T>C(p.Leu105Pro)

    1. 1-2a

      Family#PresentingHPOs HP:0011344, HP:0002283, HP:0006829, HP:0001250, HP:0000340, HP:0000414, HP:0001249, HP:0010804 (Severe global developmental delay, Diffuse brain atrophy, Severe hypotonia, Seizures, Sloped forehead, Bulbous nose, Intellectual disability, Tented upper lip)

      FamilyNotHPOs HP:0002376 (Developmental regression)

      NotHPOFreeText: Ventillator dependence

      CountryOrigin n/a

      Ethnicity Saudi

      Race n/a

      Family#PreviousTesting 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.

      Family#Method1 WES

      Family#Method2 Sanger

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

      Affected 2

      Unaffected n/a

      Segregations n/a

      PublishedLOD n/a

      eLOD n/a

      AddSegregationInfo n/a

      ProbandLabel Subject 1-1, male, 5yo died

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

      ClinVar 183338

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

      FamilyAddInfo consanguineous, sibling: Subject 1-2, female, 11yo

      FamilyPMIDs 25558065

    1. A 46-year-old Spanish male (Patient 1) born to healthy and non-consanguineous parents was referred because of a long history of muscle cramps and fasciculations affecting upper and lower limbs with onset during adolescence and associated to stutter speech. He had developed muscle weakness a few years prior to the visit affecting his ability to climb stairs or stand up from sitting and had recently started with falls when going downstairs. Neurological examination revealed diffuse fasciculations in lower limbs and mild weakness affecting both psoas and quadriceps that were atrophic (Fig. 1A). Tendon reflexes were hypoactive in lower limbs and normal in upper limbs. Sensory examination was normal. There was no spasticity and plantar reflexes were flexor. There were no signs of cerebellar involvement. Examination of the cranial nerves was normal without involvement of the bulbar muscles. Speech was described by speech therapists as spastic with a dystonic component leading to evident stuttering (Supplemental video 1).

      Case: Alonso-Perez_Patient 1, Male, 46yo, Spanish

      DiseaseAssertion: Sandhoff Disease

      CasePresentingHPOs: HP:0000007, HP:0002380, HP:0001260, HP:0001324, HP:0003202

      CaseHPOFreeText:

      CaseNOTHPOs:

      CaseNOTHPOFreeText: No signs of cerebellar involvement, cranial nerves appeared normal

      CasePreviousTesting: Nerve conduction studies and EMG were performed with normal results from nerve conduction studies but active and chronic denervation revealed by EMG. Serum CK levels were tested and found to be elevated with the rest of the biochemical analysis normal. MRI was normal with no involvement of the brain, but whole-body MRI revealed fatty replacement along with areas of healthy muscles in both quadriceps. Muscle biopsy showed neurogenic changes with angulated and atrophic fibers. Results from all previous tests suggested a diagnosis of lower motor neuron disease. Serum β-hexosaminidase-enzyme activity assay showed low levels.

      GenotypingMethod: Sanger sequencing of SMN1, DYNC1H1 and BICD2 genes showed no pathogenic variants. WES revealed HEXB mutations.

      PreviouslyPublished: n/a

      SupplementalData: n/a

      Variant: NM_000521.4, c.171delG (p.Trp57Cysfs7)

      CAID: CA3305751

      gnomAD: MAF: unavailable in gnomAD, gnomAD variant ID: 5-73981254-TG-T

      VariantEvidence: This variant is known to be pathogenic and was previously published only in infantile cases of SD, PMID: 22789865. Total hexosaminidase activity in fibroblasts from the patients with this variant in that paper range from 2.3-9.5% of the normal control levels.

      MultipleGeneVariants AR, allele on second allele

      Variant: c.1510C>T (p.Pro504Ser)

      CAID: CA116493

      gnomAD: MAF: 0.0002259, Latino/admixed American, gnomad variant ID: 5-74016469-C-T

      VariantEvidence: This variant is known to be pathogenic and was previously published in adult cases of SD, PMID: 9694901. This study concluded the effect of the mutation on ganglioside hydrolysis, combined with its effect on intracellular transport, produces chronic Sandhoff disease

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

      MONDO: MONDO:0005144 for FALS

      Case#6: Smith 2014 FALS A383T, M, 71 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.1147G>A (p.Ala383Thr)

      ClinVar: 180186

      gnomAD: 2-220115274-C-T; Total overall AF (non-neuro) = 0.000009611; TUBA4A_p.Ala383Thr_gnomAD

      CaseAddInfo: This variant found in 1/13023 control samples.

    1. 1118

      Case1118: 11 yrs onset, United States, Hispanic

      CasePresentingHPOs: HP:0006785, HP:0003236, HP:0001644, HP:0002540 (Limb-girdle muscular dystrophy, Elevated serum creatine kinase, Dilated cardiomyopathy, Inability to walk)

      HPOsFreeText: N/A

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: Parental testing not performed

      CasePreviousTesting: Serum CK levels 3,000 - 4,000 UI/l; Genetic testing also included DSG

      CaseGenotypingMethod: DNA was collected from peripheral blood or saliva samples. WES was performed and processed though a pipeline before aligning the reads and analyzing the candidate gene list for any variants using the various inheritance patterns. Screening was performed based on in silico predictors with a liberal threshold to filter variants before PCR amplification and Sanger sequencing confirmed the pathogenic mutations.

      Variant: NM_000231.2(SGCG):c.787G>A (p.Glu263Lys)

      ClinVar: 2009 https://www.ncbi.nlm.nih.gov/clinvar/variation/2009/

      gnomAD: 0.00006193, https://gnomad.broadinstitute.org/variant/13-23898591-G-A

      Note: Variant-level evidence found in PMID: 16832103. Immunohistochemistry showed absent γ-sarcoglycan in this proband.

    1. present in both subjects with prostate cancer

      CaseAddProband2 Male, African-Caribbean

      CasePresentingHPOs HP:0012125 (Prostate cancer)

      CaseNotHPOs n/a

      CasePreviousTesting Screened nonsense and missense variants in 202 candidate genes comprising ~15.5Mb. Established evidence of linkage of 17q21-22.

      Variant NM_006361.5:c.646G>T(p.Gly216Cys)

      ClinVar n/a

      CAID CA8633934

      gnomAD MAF= 0.00006152(African), no homozygotes

      CaseAddInfo Affected half-brother with same variant genotyped positive. G216C variant not observed in 110 African-American subjects in Exome Sequencing Project.

      CasePMIDs 17120048

    2. proband from an African-American family

      CaseAddProband1 Male, African-American

      CasePresentingHPOs HP:0012125 (Prostate cancer)

      CaseNotHPOs n/a

      CasePreviousTesting Screened nonsense and missense variants in 202 candidate genes comprising ~15.5Mb. Established evidence of linkage of 17q21-22.

      Variant NM_006361.5:c.685C>G(p.Arg229Gly)

      ClinVar n/a

      CAID CA400106634

      gnomAD MAF= 0.0001148(African), no homozygotes

      CaseAddInfo Affected brother with same variant genotyped positive. R229G variant not observed in 110 African-American subjects in Exome Sequencing Project.

      CasePMIDs 17120048

    3. Figure 1

      FamilyLabel UM Family 3

      FamilyUM3PresentingHPOs HP:0012125 (Prostate Cancer)

      FamilyNotHPOs n/a

      CountryOrigin n/a

      Ethnicity n/a

      Race n/a

      FamilyUM3PreviousTesting Screened nonsense and missense variants in 202 candidate genes comprising ~15.5Mb. Established evidence of linkage of 17q21-22.

      Affected 5

      Unaffected 0

      Segregations 4

      PublishedLOD n/a

      eLOD 1.2

      AddSegregationInfo n/a

      ProbandLabel UM3 III-1, Male, 45

      Variant NM_006361.5(HOXB13):c.251G>A (p.Gly84Glu)

      ClinVar 128031

      CAID n/a

      gnomAD MAF=0.007574(European(Finnish)), 2 homozygotes

      FamilyAddInfo ages rounded to nearest 5 year interval

      FamilyPMIDs 17120048

    4. Family 1

      FamilyLabel UM Family 1

      FamilyUM1PresentingHPOs n/a

      FamilyNotHPOs n/a

      CountryOrigin n/a

      Ethnicity n/a

      Race n/a

      FamilyUM1PreviousTesting Screened nonsense and missense variants in 202 candidate genes comprising ~15.5Mb. Established evidence of linkage of 17q21-22.

      Affected 4

      Unaffected 0

      Segregations n/a

      PublishedLOD n/a

      eLOD n/a

      AddSegregationInfo One female typed positive(cannot have prostate cancer), one male typed positive(has other cancer)

      ProbandLabel UM1 III-9, Male, 50

      CasePresentingHPOs HP:0012125 (Prostate Cancer)

      Variant NM_006361.5(HOXB13):c.251G>A (p.Gly84Glu)

      ClinVar 128031

      CAID n/a

      gnomAD MAF=0.007574(European(Finnish)), 2 homozygotes

      FamilyAddInfo ages rounded to nearest 5 year interval

      FamilyPMIDs 17120048

    1. (Family 6)

      Family6: West Indies

      FamilyPresentingHPOs: HP:0008947, HP:0003701, HP:0002650, HP:0003803, HP:0003755 (Infantile muscular hypotonia, Proximal muscle weakness, Scoliosis, Type 1 muscle fiber predominance, Type 1 fibers relatively smaller than type 2 fibers)

      HPOsFreeText: N/A

      FamilyNotHPOs: HP:0000508, HP:0001249, HP:0030177 (Ptosis, Intellectual disability, Abnormal nerve conduction study)

      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. Paternity was confirmed in isolated patients using microsatellite markers.

      FamilyAddInfo: Father is diagnosed with CFTD and daughter is diagnosed with nemaline myopathy resulting from the same variant

      FamilyPMIDs: N/A

      AddSegregationInfo: Not enough data to count segregation, Pedigree in Figure 1

      ProbandLabel: Case 11

      Variant: NM_152263.4(TPM3):c.503G>A (p.Arg168His)

      ClinVar: 12450 https://www.ncbi.nlm.nih.gov/clinvar/variation/12450/

      gnomAD: Not in gnomAD

    1. No. of patient (gender)Age at onset (years)LVWT (mm)AICD (yes, no)Family history of HCM/SCD (yes, no/yes, no)Other medical (recurrent or episodic) issuesLVEF (%)Mutations#94 (F)3024NoNo/noNone65MYBPC3: c.1174delG p.(Ala392fsX405) MYH7: c.161G>T p.(Arg54Leu)a TNNT2: c.832C>T p.(Arg278Cys) MYOM1: c.2087G>A p.(Arg696His)#241 (F)17<15bNoNo/noH-tx44TNNT2: c.83C>T p.(Ala28Val) LAMP2: c.741+1G>T MYOM1: c.1514A>C p.(Glu505Ala)#314 (M)4821NoYes/noHistory of hypertension62MYBPC3: c.1458-1G>A MYOM1: c.139A>G p.(Ser47Gly) MYOM1: c.2110G>A p.(Glu704Lys) MYH6: c.3883G>C p.(Glu1295Gln)#656 (M)5615NoNo/noAF, NSVT65MYBPC3: c.2610del p.(Ser871AlafsX8) GLA: c.937G>T p.(Asp313Tyr)#692 (F)6522NoYes/noHistory of hypertension65MYBPC3: c.1624G>C p.(Glu542Gln) MYOZ2: c.36A>C p.(Lys12Asn)#748 (F)1617YesYes/yesNSVT, AF, WPW syndrome60MYH7: c.5287G>A p.(Ala1763Thr) LAMP2: c.928G>A p.(Val310Ile)#787 (M)4532YesYes/noDyslipidemia, nodular thyroid disease, NSVT, AF, AFL60MYBPC3: c.2429G>A p.(Arg810His) MYBPC3: c.3370T>C p.(Cys1124Arg) CAV3: c.216C>G p.(Cys72Trp)#800 (F)2516NoYes/yesNone50TNNT2: c.536C>T p.(Ser179Phe) MYH6: c.5797-2A>G MYH6: c.5476_5477delinsAA p.(Gly1826Asn)#834 (F)1424YesYes/yesLGE at CMR imaging68TNNT2: c.275G>A p.(Arg92Gln) CAV3: c.233C>T p.(Thr78Met)#854 (M)4619NoYes/noNone60MYBPC3: c.506-2A>C ANKRD1: c.827C>T p.(Ala276Val)#865 (M)1428YesYes/noHOCM, myocardial bridge on AIA, v-fib60MYL2: c.401A>C p.(Glu134Ala) MYL2: c.206T>C p.(Met69Thr) { label (or @symbol) needed for fn[@id='tfn6-ijmm-38-04-1111'] } Bold font indicates additional mutations in MYH6, MYL2 or in genes encoding non-TTm proteins identified only by NGS analysis. a Uncovered regions: mutation identified only by Sanger sequencing; b Original borderline diagnosis of HCM has been modified in dilated cardiomyopathy. WPW, Wolff-Parkinson-White; AICD, automatic implantable cardioverter defibrillator; H-tx, heart transplantation; LVWT, left ventricular wall thickness; AF, atrial fibrillation; NSVT, non-sustained ventricular tachycardia; AFL, atrial flutter; LGE, late gadolinium enhancement; AIA, anterior interventricular artery; CMR, cardiac magnetic risonance; v-fib, ventricular fibrillation; HOCM, hypertrophic obstructive cardiomyopathy; LVEF, left ventricular ejection fraction; SCD, sudden cardiac death; NGS, next generation sequencing; HCM, hypertrophic cardiomyopathy.

      Case: Cecconi_Patient#692, female, 65 yrs old at onset of HCM

      CasePresentingHPOs:

      CasePresentingHPOsFreeText: In adults, a maximal LV wall thickness (LVWT) ≥15 mm; the maximal LVWT between 10 and 14 mm, in conjunction with other features (i.e., family history, electrocardiogram abnormalities) prompted the diagnosis of borderline HCM.

      CaseNOTHPOs:

      CaseNOTHPOSFreeText:

      CasePreviousTesting: The clinical diagnosis of primary HCM was based on medical history, a physical examination and on the echocardiographic demonstration of a hypertrophied left ventricle (LV) that could not be explained by another cardiac or systemic disease.

      CaseGenotypingMethod: NGS, Sanger Targeted NGS panel to simultaneously analyze a total of 19 genes encoding not only TTm proteins, but also other sarcomeric proteins and some non-sarcomeric proteins that cause HCM phenocopies. Sanger sequencing to ensure a depth of coverage >20X for each target nucleotide.

      Variant: c.36A>C, p.(Lys12Asn)

      ClinVarID: or CAID: 1493383, CA104969015

      gnomAD: MAF=0.0001635 in (1/6118 alleles), total allele frequency=0.000003986. No homozygotes. v2.1.1

      AddCaseInfo: Pt has LVWT of 22, family history of HCM, LVEF% of 65, and history of hypertension. Pt also has a variant in MYBPC3 (c.1624G>C p.Glu542Gln)

      PreviouslyPublished: no

      VariantEvidence: none

    1. The index patient

      CURATE AS FAMILY

      Case2: Male, Birth onset, Bosnia

      CasePresentingHPOs: HP:0008872, HP:0006829, HP:0001270, HP:0010628, HP:0006466, HP:0000486, HP:0012630, HP:0012240 (Feeding difficulties in infancy, Severe muscular hypotonia, Motor delay, Facial muscle weakness, Ankle contracture, Squint, Abnormality of the trabecular meshwork, Increased muscle lipid droplets)

      HPOsFreeText: Predominance of Type 1 muscle fibres, Broad z-band

      CaseNotHPOs: HP:0002795, HP:0002540, HP:0003798 (Abnormal respiration, Inability to walk, Nemaline bodies)

      NotHPOsFreeText: N/A

      CaseAddInfo: Affected Mother had myopathic facies and high-arched palate, weak neck flexors, and asymmetric limb involvement, Healthy grandparents and the father did not have any mutations present

      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.349G>A (p.Glu117Lys)

      ClinVar: 12462 https://www.ncbi.nlm.nih.gov/clinvar/variation/12462/

      gnomAD: Not in gnomAD

    1. NonHumanModel Mus musculus

      GeneAlteration Transgenic mouse-modified gene (C57BL/6XSJL) inserted into fertilized mouse eggs

      ModelPhenotype HP:0003124 Hypercholesterolemia

      HumanPhenotype HP:0003124 Hypercholesterolemia

      ModelEvidence Demonstrated low binding affinity of mouse and patient LDL compared to healthy control (fig. 4). Also, tested to make sure other common ligands of the receptor did not compete with the mutant apoB and sway the data (fig. 5 B,C,D). Tested to be sure that differential binding was not influenced by expression levels of apoB in R3500Q mutant using 2 other mutants (R3500G, R3500K) with different expression levels (fig. 5 A.

      ModelVariant NM_000384.2(APOB):c.10580G>A (p.Arg3527Gln), ClinVar ID: 17890

    1. Patient 3

      Case# Patient 3, male, 2yo report, Italy(Compania)

      CasePresentingHPOs HP:0001397, HP:0010837, HP:0001976, HP:0002240, HP:0003155, HP:0011967, HP:0001976 (Steatosis, Decreased serum ceruloplasmin, Reduced antithrombin III activity, Hepatomegaly, Elevated alkaline phosphatase, Copper deficiency, Reduced antithrombin III activity)

      HPOsFreeText Mild hypertransaminasemia (10mo), slight hepatomegaly, mild speech delay(1.4yo)

      CaseNotHPOs n/a

      CasePreviousTesting serum metabolic testing: AST 656[nv < 41 U/L], ALT 437[nv < 45 U/L], ALP 1235[nv < 475 U/L], total cholesterol 140[nv < 200 mg/dL], HDL chol 49[nv > 45 mg/dL], LDL chol 96[nv < 160 mg/dL] CK 510 [nv 0-170 U/L], Ceruloplasmin 8 [nv 20-46 mg/dL], Haptoglobin 30[nv 30-250 mg/dL], Copper <40[nv 69-122 μg/dL], type 2 CDG pattern recorded at 1.4yo, retested with similar outcome at 2.4yo

      CaseMethod1 Sanger

      CaseMethod2 n/a

      CaseGenotypingMethod Direct Sanger of TMEM199, no parent testing

      Variant (1) NM_152464.2:c.13_14del (p.Leu5AlafsTer30) (2) NM_152464.2(TMEM199):c.92G>C (p.Arg31Pro)

      ClinVar (2) 218964

      CAID (1) CA8456913

      gnomAD (1) 0.00004607(European (Non-Finnish)), 0.00002063(total)-5 heterozygotes (2) 0.00008933(Latino), 0.00004108(Total)-10 heterozygotes

      VariantEvidence western blot was not done on this patient's cells, but he has the same TMEM199 variants as the cells that were tested.

      CaseAddInfo same variant as "unrelated" family also from Compania, Italy

      CasePMIDs 26833330

    2. Family 1

      Family#PresentingHPOs HP:0003124, HP:0003236, HP:0003155, HP:0010837, HP:0001397, HP:0011967, HP:0001405 (High cholesterol, Elevated CK, Elevated alkaline phosphatase, Decreased serum ceruloplasmin, Steatosis, Copper deficiency, Periportal fibrosis)

      HPOsFreeText hypertransaminasemia and slight hepatomegaly(2yo), focal steatosis

      FamilyNotHPOs n/a

      CountryOrigin Italy

      Ethnicity n/a

      Race n/a

      Family#PreviousTesting serum metabolic testing: elevated AST, ALT, ALP, cholesterol(LDL and HDL), and CK, reduced ceruloplasmin and copper, normal haptoglobin. High liver copper, type 2 CDG

      Family#Method1 WES

      Family#Method2 n/a

      Family#GenotypingMethod n/a

      Affected 2

      Unaffected n/a

      Segregations n/a

      PublishedLOD n/a

      eLOD n/a

      AddSegregationInfo n/a

      ProbandLabel Patient 1, Female, 2yo onset

      Case1PreviousTesting serum metabolic testing: AST 349[nv < 41 U/L], ALT 329[nv < 45 U/L], ALP 1995[nv < 475 U/L], total cholesterol 340[nv < 200 mg/dL], HDL chol 49[nv > 45 mg/dL], LDL chol 256[nv < 160 mg/dL] CK 799 [nv 0-170 U/L], Ceruloplasmin 6 [nv 20-46 mg/dL], Haptoglobin 20[nv 30-250 mg/dL], Copper <40[nv 69-122 μg/dL] recorded at 2yo, retested with similar outcome at 27yo save for restored AST 53U/L and ALT 23U/L

      Case2 Patient 2, male, 2yo onset

      Case2Previoustesting serum metabolic testing: AST 299[nv < 41 U/L], ALT 221[nv < 45 U/L], ALP 3990[nv < 475 U/L], total cholesterol 240[nv < 200 mg/dL], HDL chol 45[nv > 45 mg/dL], LDL chol 176[nv < 160 mg/dL] CK 442 [nv 0-170 U/L], Ceruloplasmin 4 [nv 20-46 mg/dL], Haptoglobin 40[nv 30-250 mg/dL], Copper <40[nv 69-122 μg/dL] recorded at 2yo. Remained elevated at next check at age 24 save for ALT 50 U/L.

      Variant (1) NM_152464.2:c.13_14del (p.Leu5AlafsTer30) (2) NM_152464.2(TMEM199):c.92G>C (p.Arg31Pro)

      ClinVar (2) 218964

      CAID (1) CA8456913

      gnomAD (1) 0.00004607(European (Non-Finnish)), 0.00002063(total)-5 heterozygotes (2) 0.00008933(Latino), 0.00004108(Total)-10 heterozygotes

      Variant Evidence No detectable TMEM199 in patient fibroblasts on western blot.

      FamilyAddInfo n/a

      FamilyPMIDs 26833330

    1. 2.2.1. Patient #F061The patient was an Italian male, born from a consanguineous marriage, who was admitted to the hospital at 2 months of age for diarrhea and steatorrhea associated with abdominal distension, anemia (RBC 3.02 × 106/μL; Hb 7.7 g/dL), hepatosplenomegaly, increased liver enzymes (AST 86 IU/L—n.v. 10–40; ALT 38 IU/L—n.v. 5–35), hypoproteinemia (4.8 g/dL—n.v. 6.1–7.9) and failure to thrive. Peripheral blood smear showed the presence of vacuolated leukocytes; bone marrow biopsy showed vacuolization in histiocytes suggesting intralysosomal and cytoplasmic accumulation of lipids (foam cells). The adrenal glands were markedly enlarged and extensively seeded with calcific deposits. LAL activity in skin fibroblasts was 1.4 nmol/mg protein/min (n.v. 55.8 ± 15.6 nmol/mg protein/min). The clinical features and the severe LAL defect were consistent with the diagnosis of WD. The patient died of hepatic and adrenal failure at 6 months of age.

      Case: Patient #F061-male, Italy, 2 months old at onset, died at 6 months

      CasePresentingHPOs: HP:0002014, HP:0002570, HP:0003270, HP:0001903, HP:0001433, HP:0001508, HP:0008221

      CasePresentingHPOsFreeText: Anemia (RBC 3.02 × 106/μL; Hb 7.7 g/dL), increased liver enzymes (AST 86 IU/L—n.v. 10–40; ALT 38 IU/L—n.v. 5–35), hypoproteinemia (4.8 g/dL—n.v. 6.1–7.9). Presence of vacuolated leukocytes. Bone marrow biopsy showed vacuolization in histiocytes suggesting intralysosomal and cytoplasmic accumulation of lipids (foam cells). Adrenal glands seeded with calcific deposits. LAL activity in skin fibroblasts was 1.4 nmol/mg protein/min (n.v. 55.8 ± 15.6 nmol/mg protein/min). Hepatic and adrenal failure at 6 months of age. LAL activity is 2.5% of normal.

      CaseNOTHPOs:

      CaseNOTHPOSFreeText:

      CasePreviousTesting: peripheral blood smear, bone marrow biopsy

      CaseGenotypingMethod: LIPA gene exons and exon–intron boundaries were PCR amplified using sets of primers designed according to the LIPA genomic sequence. Putative mutations were confirmed by sequencing duplicate PCR products.

      Variant: c.229+1G>A homozygous

      ClinVarID: or CAID: CA211323057

      gnomAD: This proband is homozygous for a splice site variant, c.229+1G>A in intron 3, which is predicted to cause out-of-frame skipping of exon 3, generating a transcript with a PTC which would rapidly undergo degradation by NMD. The variant is not reported in gnomAD. This proband is scored reduced points due to alternative splicing.

      AddCaseInfo: consanguineous parents

      PreviouslyPublished: no

      VariantEvidence: predictive

    1. another JPH2 variant (A405S) was identified in a Caucasian male whose HCM was diagnosed at age 16 years. This proband presented with dyspnea, chest pain, and dizziness. He later developed basal septal morphology hypertrophy (23 mm) and was diagnosed with HCM. He had no family history of HCM or sudden cardiac death; both parents were genotype negative and never developed QTc prolongation or supraventricular arrhythmias.

      Case 2: male, dx at 16 yrs, no family history of HCM, both parents genotype neg

      HP:0001639, HP:0002094, HP:0100749, HP:0002321

      HCM, dyspnea, chest pain

      Variant: NM_020433.4(JPH2):c.1213G>T (p.Ala405Ser)

      ClinVar ID: 372724, https://www.ncbi.nlm.nih.gov/clinvar/variation/372724/

      ExAC Frequency: 1.45e-5, http://gnomad.broadinstitute.org/variant/20-42747220-C-A

    1. CM

      Case#: CM (II:3), deceased at age 18 years.

      CaseHPOs: HP:0002024, HP:0002013, HP:0002570, HP:0001251, HP:0001260, HP:0002495, HP:0001284 (malabsorption, vomiting, steatorrhea, ataxia, dysarthria, impaired vibratory sensation, absent deep tendon reflexes)

      CaseHPOsFreeText: Symptoms as early as 4 months of age. Diagnosed with FHBL at 10 month; treatment with medium chain triglycerides (MCT) led to weight gain and a decrease in steatorrhea. Abnormalities in liver function, micronodular cirrhosis at 30 months, thought to be caused by treatment with MCT, progression to portal hypertension and esophageal varices. Neurologic symptoms stabilized on vitamin E therapy. At age 15, hepatitis A and cholelithiasis. He developed seizures, had a cerebrovascular accident, recurrent massive gastrointestinal hemorrhages, and finally cardiac arrest at the age of 18 (further details in PMID: 4135110).

      CasePreviousTesting: No detectable plasma apoB by radial immunodiffusion (PMID: 4135110), Total cholesterol 36 mg/dl, triglyceride 12 mg/dl, no detectable LDL-cholesterol, HDL-cholesterol 36 mg/dl at age 15 years. No genetic testing other than APOB sequencing.

      CaseGenotypingMethod: See family method

      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;<br /> Variant 2: 0.00002640 (Euro non-Finnish)

      CasePMIDs: 4135110

    1. While the Q785R mutation presented normal mtDNA and partially affected mitochondrial morphology, similar to the D603H mutation, the S545R mutation had an intermediate behavior, borderline across phenotypes. Indeed, the complete fragmentation of the mitochondrial network was associated with only a slight, non-significant reduction of mtDNA amount, supporting a borderline nature of this variant, causing either DOA or DOA “plus” possibly depending on modulation of other genetic and/or environmental modifiers. MEFs analysis suggests that a complete fragmentation of the mitochondrial network, in association with mtDNA depletion, hallmarks the DOA “plus” phenotype, whereas if these two parameters are mildly affected the final outcome is expected to be pure DOA. This hypothesis is represented in the scheme of Fig. 10.

      Expression of the Ser600Arg variant in OPA1-null mouse embryonic fibroblasts showed complete fragmentation of the mitochondrial network and a slight, non-significant reduction of mtDNA amount indicating that this variant impacts protein function (PMID: 30293569)(PS3_Supporting).

    1. In another study, Atçeken et al10 analyzed 15 patients with MPSI from Turkey. They used direct sequencing to determine the disease‐caused mutations in IDUA gene and identify nine new different pathologic variants (c.494‐1G > A, c.793‐6C > G, c.793‐5C > A, p.M1L, p.Y64X, p.A327P, p.W402X, p.P533L, and p.R628X).

      This variant is mentioned in reference to a previously published report (PMID: 27511503)

    1. Subject 1

      Case# Subject 1, F, 4yo onset, Hispanic

      CasePresentingHPOs HP:0002373, HP:0001260, HP:0006957, HP:0002913, HP:0007359, HP:0002104, HP:0003236, HP:0001987, HP:0001943, HP:0002058, HP:0000252, HP:0006801, HP:0003487, HP:0000577, HP:0002376, HP:0003236, HP:0001249, HP:0003201, HP:0000252

      HPOcont: Febrile seizures, Dysarthria, loss of ability to walk, Myoglobinuria, Focal autonomic seizures, Apnea, Hyperammonemia, Hypoglycemia, Myopathic facies, Microcephaly, Brisk DTR, Babinski sign, Exotropia, Developmental regression, Elevated CPK, Hypoglycemia, Intellectual Disability, Rhabdomyolysis, Microcephaly

      HPOFreeText: Febrile seizure at 1 year of age, developmental regression in the following 3 years with recurrent seizures, losing the ability to ambulate and speak, as well as right focal seizure, apnea, and unresponsiveness triggered by fever. On hospital admission she was noted to have elevated urine myoglobin, elevated creatine phosphokinase, aspartate aminotransferase, alanine aminotransferase, ammonia and hypoglycemia. MRI showed mild diffuse atrophy of the left cerebral hemisphere. "Ophthalmology evaluation showed intermittent exotropia. Echocardiogram and electrocardiogram (ECG) were unremarkable. Hysical examination was relevant for microcephaly (FOC 47.5 cm; <5th percentile for age), myopathic facies with drooling, increased tone in all extremities, and brisk deep tendon reflexes (DTRs) throughout with positive Babinski sign.

      CaseNotHPOs HP:0011675

      NotHPOcont: Arrhythmia

      CasePreviousTesting "urine myoglobin of 94 ng/ml (normal range 10–65 ng/ml), serum creatine phosphokinase (CPK) of 205,000 U/l (normal range 75–230 U/l), elevated aspartate aminotransferase (AST) of 1,618 U/l (normal range 15–50 U/l), alanine aminotransferase (ALT) of 571 U/l (normal range 10–25 U/l), ammonia of 122 μmol/l (normal range 22–48 μmol/l), and hypoglycemia (blood glucose 30 mg/dl; normal range 70–110 mg/dl)."

      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, mother tested heterozygous, father unavailable. cSNP data showed no evidence of deletion or uniparental isodisomy of the region.

      CasePMIDs n/a

    1. Other synonymous variants and previously reported polymorphisms were also detected

      Supplementary Table 1 (7 cols x 6 rows)

      Nucleotide position Type of variation rs ID 1000 Genome MAF % ESP MAF %<br /> Italian Controls (MAF%) SALS (MAF %) c.909A>G p.Val303Val rs141922502 0.18 0.477 37/3960 (0.47) 14/1106 (0.6) c.999C>T p.Ala333Ala rs147351423 0.32 0.19 20/3960 (0.25) 2/1106 (0.1) c.1257C>T p.Ser419Ser rs199590938 0.01 § - - 1/1106 (0.05) c.376-16C>T Intronic rs116486324 0.16 0.21 n.c. 1/1106 (0.05) c.8G>A 3’UTR rs142720001 0.02 0.023 4/3960 (0.05) 1/1106 (0.05) c.48G>A 3’UTR rs11556349 1.7 0.845 46/3960 (0.58) 4/1106 (0.18)

    1. patient 1

      Case1: Female, Austria, 18 yrs report

      CasePresentingHPOs: HP:0010628, HP:0001558, HP:0002643, HP:0002015, HP:0040288, HP:0001260, HP:0003690, HP:0009046, HP:0003551, HP:0003798 (Facial weakness, Reduced fetal movement, Neonatal respiratory distress, Swallowing difficulties, Nasogastric tube feeding, Dysarthric speech, Limb weakness, Difficulty running, Difficulty climbing stairs, Nemaline bodies)

      HPOsFreeText: 4/5/7 Apgar score

      CaseNotHPOs: HP:0002015, HP:0002540, HP:0002650, HP:0002098 (Swallowing difficulties, Non-ambulatory, Scoliosis, Respiratory distress)

      NotHPOsFreeText: N/A

      CaseAddInfo: N/A

      CasePreviousTesting: N/A

      CaseGenotypingMethod: Whole exome sequencing of the proband revealed this homozygous LMOD3 mutation.

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

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

      gnomAD: Not in gnomAD

    1. Table 1. Rare nsSNVs identified in 36/44 HCM patients. A comment inferred from review of literature, in silico predictions and evolution conservation analysis, is given for each DNA change in the last column. Based on those considerations and on the type of variant, comments with a gray background highlight DNA changes predicted to be possibly pathogenetic. Comments in bold stand for DNA variants that have been previously reported as phenotype modifying factors.

      Case: Bottillo Patient 17, Female, 50 yrs at diagnosis

      CasePresentingHPOs: copy from group

      CasePresentingHPOsFreeText: NYHA functional class 2, maximal wall thickness=14mm, left ventricular mass (at CMRI)=91(mg/m2), LVEF=52%, maximal oxygen uptake=78%, diastolic dysfunction grade=3, QT interval corrected for heart rate=0.4ms, thoracic pains, met ECG hypertrophy criteria, left bundle branch block, heart failure, mild intramyocardial CMRI

      CaseNOTHPOs:

      CaseNOTHPOSFreeText: family history of HCM or SCD

      CasePreviousTesting: copy from group

      CaseGenotypingMethod: copy from group

      Variant: c.4485-6T>C

      ClinVarID: or CAID: CA2573331909

      gnomAD: This proband has an intronic missense variant that is not present in gnomAD. Pt also has variants in TNNT2 (p.R84S), RBM20 (p.D20G), CAV3 (p.T78M), and MYPN (p.A135A) which are either not present in or have conflicting interpretations of pathogenicity in ClinVar. This proband is scored reduced points.

      AddCaseInfo:

      PreviouslyPublished: no

      VariantEvidence: Predicted branch-point splice site broken.

    1. Generation of a rat model of MPSIVA disease

      NonHumanModel: Mus musculus

      GeneAlteration: p.Arg386Cys the most frequently reported missense variant linked as a causal pathogenic allele in mucopolysaccharidosis IVA patients

      ModelPhenotype: In addition to undetectable GALNS enzyme activity in any assayed tissue, increased keratan sulfate detection in liver tissue and blood serum, the boney deformations missing from previous models were present in this mouse model HP:0004325, MP:0001258, HP:0005736

      HumanPhenotype: HP:4000197, HP:0012069, HP:0004322, HP:0005736

      ModelEvidence: CRISPR/Cas9 directed site mutagenesis of murine Galns coding sequence at codon homologous to the human p.Arg388Cys mutation cited in human MPSIVA patients. Mouse model showed increased keratan sulfate accumulation in liver and blood serum, undetectable n-acetylgalactosamine-6-sulfatase activity in any body tissue assayed as well as skeletal deformities consistent with human MPSIVA patients

      ModelVariant: p.Arg388Cys

      WhereInPaper:

    1. Table 2IDUA gene mutations detected in 22 patients with MPS I

      Case#: Li Proband, US

      DiseaseAssertion: MPS1 (Hurler)

      FamilyInfo: n/a

      CasePresentingHPOs: deficient IDUA activity in leukocyte, fibroblasts, or cultured trophoblasts. MPS IH defined as "organomegaly, heart disease, severe mental retardation, and death in childhood" but no individual phenotype information provided.

      CaseHPOFreeText:

      CaseNotHPOs:

      CaseNotHPOFreeText:

      CasePreviousTesting: n/a

      GenotypingMethod: mutation detection using reverse transcriptional polymerase chain reaction (RT-PCR) and genomic PCR sequencing. Polymorphism analyses were performed on controls by restriction enzyme assays of PCR amplicons flanking nine IDUA intragenic single nucleotide polymorphic alleles.

      PreviouslyPublished: n/a

      Variant: R628X; Q70X (path classification by LD VCEP). Also has Q33H(187G/T) polymorphism

      ClinVar: 550421

      CAID: CA2802462

      gnomAD: The highest population minor allele frequency in gnomAD v4.1.0. is 0.00005038 (2/39700 alleles) in the East Asian population, which is lower than the ClinGen Lysosomal Diseases VCEP’s threshold for PM2_Supporting (<0.00025), meeting this criterion (PM2_Supporting).

      SupplementalData: n/a

    1. These data were combined through CATCH,37 and after analysis of the results, three variants remained for further evaluation (Table S1) in genes PIGG (c.928C>T [p.Gln310∗] [GenBank: {"type":"entrez-nucleotide","attrs":{"text":"NM_001127178.2","term_id":"573459749","term_text":"NM_001127178.2"}}NM_001127178.2]), COQ5 (MIM: 616359; c.319G>A [p.Gly107Arg] [GenBank: {"type":"entrez-nucleotide","attrs":{"text":"NM_032314.3","term_id":"116063535","term_text":"NM_032314.3"}}NM_032314.3]), and RGS12 (MIM: 602512; c.188A>T [p.Gln63Leu] [GenBank: {"type":"entrez-nucleotide","attrs":{"text":"NM_002926.3","term_id":"108773791","term_text":"NM_002926.3"}}NM_002926.3]). All variants were confirmed by Sanger sequencing, and family segregation confirmed that the affected individuals, as well as the unaffected siblings, are heterozygous for the variants (Figure 3A). Variants in PIGG and COQ5 are not present in publically available databases, whereas the variant in RGS12 has a cumulative frequency of 4.95e−5 in the Exome Aggregation Consortium (ExAC) Browser.43 The variant in PIGG is nonsense, whereas the other two are missense.Open in a separate windowFigure 3Identified Variants(A) Sequencing chromatograms of the identified variant in family EG. The parents and unaffected siblings are heterozygous, whereas the affected individuals are homozygous for the c.928C>T mutation (noted by the black arrow).(B) Sequencing chromatograms of the identified variant in family JP. The father has the heterozygous c.2005C>T variant, but the mother does not (noted by the black arrow).(C) XHMM analysis using WES data of individual JP01. A microdeletion involving PIGG (chr4: 60,226–2,452,836) is indicated.(D) qPCR analysis of exons 7 and 12 of the PIGG genome from individual JP01 and her parents shows a heterozygous PIGG deletion in the affected individual, but not in her mother, suggesting that the deletion occurred de novo on the maternal chromosome.(E) Sequencing chromatograms of the identified variant in family PK are noted by the blue transparent boxes. The parents are heterozygous, and the affected individuals are homozygous for the c.2261+1G>C mutation.PIGG was considered the most prominent candidate because the variant identified causes a clear loss of function. A recent inquiry of the ExAC Browser verified that no homozygous loss-of-function variants have been reported and that the most common loss-of-function variant, c.1515G>A (p.Trp505∗) (GenBank: {"type":"entrez-nucleotide","attrs":{"text":"NM_001127178.2","term_id":"573459749","term_text":"NM_001127178.2"}}NM_001127178.2), has a minor allele frequency (MAF) of 0.0012 in the European population. This translates to a frequency of less than 1 in 600,000 individuals, compatible with a rare autosomal-recessive disorder.

      This family's affected individuals have some phenotypes consistent with COQ10 deficiency (hypotonia, seizures, uniform developmental delay or intellectual disability), but the COQ5 variant was heterozygous which is inconsistent with the MOI for COQ5-AR COQ10 deficiency. Additionally, variants in other genes were found that could explain the phenotype.

    1. These results suggest that expression of CASQ2R33Q enhances the propensity for spontaneous Ca2+ release from the SR, apparently by increasing the functional activity of the RyR2 channels.

      NonPatientCell myocardium, UBERON:0002349

      GeneAlteration isolated adult rat ventricular myocytes infected with adenoviruses for expression of either the wild-type (WT) or mutant forms of CASQ2. Cytosolic and intra-SR [Ca2+]

      FunctionalEvidence Causes leakage of Ca2+ transients from SR (fig. 5)

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

    1. F3-II

      Case# F3-II1, female, 23yo report, Greek

      CasePresentingHPOs HP:0008947, HP:0003155, HP:0010837, HP:0003124, HP:0003141, HP:0012347, HP:0012358, HP:0001263 (Infantile Hypotonia, Elevated alkaline phosphatase, Low ceruloplasmin, Elevated cholesterol, Elevated LDL-C, Abnormla N-glycosylation, Abnormal O-glycosylation, Psychomotor delay)

      HPOsFreeText Elevated amino transferases

      CaseNotHPOs n/a

      CasePreviousTesting Serum ALT 36–172 U/l [normal range, 0–50 U/l], AST 31–119 U/l [normal range, 0–50 U/l], ALP 132–1,528 U/l [normal range, < 360 U/l], ceruloplasmin 17–24 mg/dl [normal range, 15–60 mg/dl], cholesterol 231–257 mg/dl [normal range, 120–200 mg/dl], LDL-C 161–171 mg/dl [normal range, 50–130 mg/dl], type 2 CDG

      CaseMethod1 Sanger

      CaseMethod2 n/a

      CaseGenotypingMethod Sanger on patient and parents found variant in heterozygous state in both parents

      Variant NM_152464.2(TMEM199):c.92G>C (p.Arg31Pro), homozygous

      ClinVar 218964

      gnomAD 0.00008933(Latino), 0.00004108(Overall), 10 heterozygotes

      VariantEvidence n/a

      CaseAddInfo nonconsanguineous

      CasePMIDs n/a

    2. F2-II2

      Case# F2-II2, male, 41yo report

      CasePresentingHPOs HP:0003155, HP:0010837, HP:0003124, HP:0001397, HP:0025321, HP:0003141, HP:0012347, HP:0006579, HP:0000023, HP:0003236 (Elevated alkaline phosphatase, Low ceruloplasmin, Elevated cholesterol, Steatosis, Copper accumulation in liver, Elevated LDL-C, Abnormal N-glycosylation, Neonatal jaundice, Inguinal hernia, Elevated CPK)

      HPOsFreeText Inguinal hernia and increased CPK (11yo) minimal fibrosis (30yo), elevated amino transferases (11yo)

      CaseNotHPOs HP:0200032 ( Kayser-Fleischer rings)

      CasePreviousTesting serum ALT 190 U/l [normal range, 0–50 U/l], AST 153 U/l [normal range, 0–50 U/l], and ALP 718 U/l [normal range, < 360 U/l] (11yo), hepatic dry copper weight of 90 μg/g [normal range, <40 μg/g], ceruloplasmin 8.8 mg/dl [normal range, 15–60 mg/dl], cholesterol 204–337 mg/dl [normal range, 120–200 mg/dl], LDL-C 182–226 mg/dl [normal range, 50–130 mg/dl], type 2 CDG.

      19067230: Laboratory tests excluded celiac disease, alpha1-antitrypsin deficiency, cystic fibrosis, galactosaemia and hypobetalipoproteinaemia. Liver iron concentration was normal, normal saturation of transferrin and ferriten, negative for hepatotrophic viruses. Serum anithrombin III (57%, normal range 80–120%) and clotting factor XI (42% , normal range 60–140%) were low.

      CaseMethod1 WES

      CaseMethod2 n/a

      CaseGenotypingMethod WES in patient, sequenced father and mother found to be heterozygous for either variant

      Variant NM_152464.2(TMEM199):c.[376-1G>A];[40G>C]

      ClinVar 427819

      gnomAD n/a for both

      VariantEvidence Fig 2C, Western blot: reduced TMEM199 expression in patient fibroblasts

      CaseAddInfo nonconsanguineous, father had history of hypercholesterolemia and ischemic heart disease.

      CasePMIDs 19067230

    1. Two sisters,

      Family#PresentingHPOs: P1: HP:0000943, HP:0008922, HP:0002650, HP:0001537, HP:0020152, HP:0002515, HP:0002808, HP:0007957, HP:0008480, HP:0005180, HP:0002857,HP:0012069, HP:0002870 P2:HP:0001537, HP:0002857, HP:0007957, HP:0005180, HP:6000342, HP:0001385, HP:0000768, HP:0100559, HP:0012069 occipitocervical stenosis, myelomalacia

      FamilyNotHPOs:

      CountryOrigin:

      Ethnicity:

      Race:

      Family#PreviousTesting:

      Family#Method1:

      Family#Method2:

      Family#GenotypingMethod: unspecified NGS technique followed by GALNS specific Sanger seq of exons and targeted intronic regions

      Affected: 2

      Unaffected: 2

      Segregations:

      PublishedLOD:

      eLOD:

      AddSegregationInfo:

      ProbandLabel: DeLong_P1, DeLong_P2

      Variant: NM_000512.5(GALNS):c.899-397_1003-1862del

      ClinVar: 1048483

      CAID: CA2499223751

      gnomAD: n/a

      FamilyAddInfo:

      FamilyPMIDs:

    1. compound heterozygous ACPT mutations were identified in family 6

      Family Name: Family 6

      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: 2

      Unaffected: 3

      Segregations: 1

      PublishedLOD: n/a

      eLOD: 1.0

      AddSegregationInfo: non-consanguineous family

      ProbandLabel: Family 6: III:1, female, 11 yo

      Variant 1: NM_033068.2(ACP4):c.382G>C (p.Ala128Pro)

      ClinVar or CAID: 374865, https://www.ncbi.nlm.nih.gov/clinvar/variation/374865/

      genomAD: 2.449e-5, http://gnomad.broadinstitute.org/variant/19-51294991-G-C

      Variant 2: NM_033068.2(ACP4):c.397G>A (p.Glu133Lys)

      ClinVar: 374866, https://www.ncbi.nlm.nih.gov/clinvar/variation/374866/

      genomAD: 8.196e-6, http://gnomad.broadinstitute.org/variant/19-51295006-G-A

      FamilyAddInfo: parents unaffected

      CasePresentingHPOs: HP:0006297, HP:0011077, HP:0000698

      CasePresentingHPOTerm: hypoplastic enamel, destructed first molars, mandibular anterior teeth had incisal edges,

      CaseNotHPOs: HP:0011073

      AddCaseInfo: compound heterozygous mutations

      VariantEvidence:

    1. proband 2

      CaseB:III-2: Male, 2 years onset, China

      CasePresentingHPOs: HP:0004912, HP:0003109, HP:0003155, HP:0006505, HP:0002753, HP:0002982, HP:0004349, HP:0000944, HP:0011849, HP:0002970, HP:0003170 (Hypophosphatemic rickets, Hyperphosphaturia, Elevated alkaline phosphatase, Abnormality of limb epiphysis morphology, Thin cortices, Tibial bowing, Reduced bone mineral density, Abnormality of the metaphysis, Abnormal bone ossification, Genu varum, Abnormality of the acetabulum)

      HPOsFreeText: Fuzzy structures

      CaseNotHPOs: N/A

      NotHPOsFreeText: N/A

      CaseAddInfo: Proband is hemizygous for this mutation, Has a mother and grandmother with the same mutation/disease at 141.3 cm and 142.8 cm respectively

      CasePreviousTesting: For all probands: Decreased serum phosphorus levels (0.64–0.9 mM; normal range, 1.29–1.94 mM), Increased 24-h urinary phosphorus levels (49.8–68.4 mmol/day; normal range, 12.9–42.0 mmol/day), Elevated blood alkaline phosphatase levels (350–668.7 U/L; normal range, 42–390 U/L), Lower limit of normal serum 1,25-dihydroxyvitamin D3 levels, Normal blood PTH, serum calcium levels and urine calcium/creatinine ratio, Elevated serum FGF23 (>1500 pg/mL; lower than 28 pg/mL in healthy family members)

      CaseGenotypingMethod: Peripheral blood from the probands and affected family members was collected and genomic DNA extracted and quantified. Next-generation sequencing was performed on the probands following PCR amplification and the results were examined with the TruSight One Sequencing Panel, with such genes as PHEX, FGF23, SLC34A3, DMP1 and ENPP1. The mutations were then compared to a reference sequence and filtered for pathogenicity. Sanger sequencing was performed on the probands and family members to confirm the detected mutations.

      Variant: NM_000444.5:c.433G>T (p.Glu145Ter)

      CAID: CA412571205 https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/allele?hgvs=NM_000444.5%3Ac.433G%3ET

      gnomAD: Not in gnomAD

    1. (Fig. 1B)

      Hollander CF

      Family#PresentingHPOs HP:0007663

      FamilyNotHPOs

      CountryOrigin Italy

      Ethnicity NonHispanic

      Race White

      Family#GenotypingMethod GeneChip Mapping 250K Nsp Array; Affymetrix, Santa Clara, CA) at the Microarray Core of the Dana-Farber Cancer Institute. The genotyping data were analyzed for homozygous regions using dCHIP

      Affected 4

      Unaffected 3

      Segregations 4

      eLOD 2.18

      AddSegregationInfo consanguineous

      ProbandLabel Hollander II:1

      CasePresentingHPOs HP:0011505

      Variant NM_002900.2:c.3238G>A

      CAID CA344701

      gnomAD 0.00006537

    1. we describe a third patient with a homozygous frameshift variant in GDAP2

      MonDO: MONDO:0032706

      Case: 58-year-old male of Greek origin presenting with a progressive cerebellar syndrome starting at the age of 33 years with mild gait imbalance, ataxia and dysarthria. Apart from dyslipidaemia, type 2 diabetes, and chronic diarrhoea presenting at 37 years of age and attributed to irritable bowel syndrome, the rest of the patient’s medical history is unremarkable. Proband has NM_017686.4; c.134delC with mother as carrier.

      DiseaseAssertion: Cerebellar ataxia

      FamilyInfo: His relatives have reported personality changes with emotional lability, aggressive behaviour and depressive episodes. Family history is negative for neurological disorders. Both parents originated from the same small village but there was no known consanguinity in the family

      CasePresentingHPOs: HP:0002141, HP:0002070, HP:0002066, HP:0001260, HP:0003119, HP:0005978, HP:0002028, HP:0000726 (Gait imbalance, Limb Ataxia, Gait Ataxia, Dysarthria, Abnormal circulating lipid concentration, Type II diabetes mellitus, Chronic diarrhea, Dementia)

      CasePreviousTesting: Neurological examination at the age of 50, when the proband was first seen, showed severe gait ataxia with mild pyramidal features consisting of brisk reflexes, dysmetria, dysdiadochokinesia, cerebellar dysarthria, jerky pursuit and nystagmus, mild behavioural changes, and disturbances of short-term memory. Follow-up neurological examination at the age of 58, revealed severe gait disturbance, dysmetria, dysdiadochokinesia and brisk deep tendon reflexes with flexor plantar responses, as well as gaze-evoked nystagmus, jerky pursuit, hypermetric saccades, cerebellar dysarthria, and mild sensory loss in the lower limbs (Supplementary Video 1). Scale for the assessment and rating of ataxia (SARA) score at that time was 31/40 and Mini-Mental State Examination (MMSE) score was 24/30. A detailed neuropsychological assessment was performed, revealing widespread deficits in encoding, learning, and consolidating new verbal information. Overall, the patient exhibited prominent deficits in episodic memory, verbal working memory, and executive functions. A brain MRI scan, including susceptibility-weighted imaging (SWI), was performed and revealed marked cerebellar atrophy affecting the hemispheres and more significantly the vermis, as well as mild cortical atrophy, midbrain and pons atrophy. Nerve conduction studies (NCS), electromyography (EMG) and ophthalmological evaluation were all normal. Laboratory testing of alpha-fetoprotein levels, vitamin E, copper, and folic acid were also normal. To exclude the possibility of an underlying autoimmune disease, the patient’s serum was tested for binding to various markers, including a panel of paraneoplastic markers of autoimmunity, GAD, NMDA, AMPA, GABAB, DPPX and VGKC, as well as monkey cerebellum frozen tissue. No binding to any of these markers was detected.

      GenotypingMethod: Blood samples from the proband and his mother were collected for whole exome sequencing ans Sanger confirmation. Initial screening for Friedreich’s ataxia, as well as spinocerebellar ataxia (SCA) types 1, 2, 3, 6 and 7 in the proband was negative.

      Variant: GDAP2:c.134del, p.(Pro45Leufs*22)

      CAID: CA2574039871

      gnomAD: Total AF 0.000001866, gnomAD v4.1 (https://gnomad.broadinstitute.org/variant/1-117920223-AG-A?dataset=gnomad_r4)

    1. the famil

      Family1: N/A

      FamilyPresentingHPOs: HP:0009027, HP:0031374, HP:0008963, HP:0001761, HP:0012515, HP:0008944, HP:0008948, HP:0003484, HP:0001265, HP:0003458 (Foot dorsiflexor weakness, Ankle weakness, Tibialis muscle weakness, Pes cavus, Hip flexor weakness, Distal lower limb amyotrophy, Proximal upper limb amyotrophy, Upper limb muscle weakness, Hyporeflexia, EMG: myopathic abnormalities)

      HPOsFreeText: N/A

      FamilyNotHPOs: HP:0009130, HP:0003474, HP:0003445 (Hand muscle atrophy, Sensory impairment, EMG: neuropathic changes)

      NotHPOsFreeText: N/A

      FamilyPreviousTesting: Genomic DNA was extracted and RFLP was performed on all family members. Fragments were separated, hybridized, and subject to linkage analysis.

      FamilyGenotypingMethod: A refined linkage analysis was performed with the deaths of some family members and additions of others, allowing for the narrowing of the genomic region. Afterwards, RNA was extracted from a frozen sample of the proband and cDNA was sequenced. PCR amplification and direct sequencing was used to confirm the mutation in the proband. SSCP was used to screen the family members and other NM probands for the mutation.

      FamilyAddInfo: Pedigree in Figure 1

      FamilyPMIDs: 1347195 (Family Characterization)

      Affected: 9 Alive, 2 Now deceased

      Unaffected: 11

      Segregations: 10

      PublishedLOD: 4.52 at zero recombination with candidate gene sequencing

      AddSegregationInfo: Annotate with other pertinent information as needed.

      ProbandLabel: IV-3

      Variant: NM_152263.4(TPM3):c.26T>G (p.Met9Arg)

      ClinVar: 12446 https://www.ncbi.nlm.nih.gov/clinvar/variation/12446/

      gnomAD: European (Non-Finnish) 8.828e-6, Overall 4.009e-6 https://gnomad.broadinstitute.org/variant/1-154164469-AT-A

    1. SD2 M I 32.5 100 c.850C>T (p.R284X) c.1613+2T>G (p.E538ins4X5)

      Case: Zampieri SD2, Male

      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) on allele 1

      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.

      MultipleGeneVariants: AR, different variant in second allele

      GeneName: HEXB

      Variant: c.1613+2T>G (p.E538ins4X5) on allele 2

      CAID: CA3306214

      gnomAD: MAF: 0.000008808, European (non-Finnish), gnomAD ID: 5-74016574-T-G

      VariantEvidence: PMID: 8535449 previously reported this variant to be associated with the infantile form of SD. This study found the total Hex activity to be 8% of the normal level, with only 0.5% being hex B which was reported to be insignificant. This intronic mutation affects the 5' donor site of intron 13 and results in insertion of 48 nucleotides which shifts the reading frame and results in the generation of a PTC.

    1. individual lII-12

      Case# Monnier 3:12, died age 30, male, French

      CasePresentingHPOs HP:0001649, HP:0006682, HP:0012416, HP:0001695, HP:0001945

      CasePreviousTesting N/A

      CaseMethod1 PCR

      CaseGenotypingMethod PCR and sequencing gel for CACNL1A3.PCR1 amplimer

      Variant NM_000069.2(CACNA1S):c.3257G>A (p.Arg1086His)

      ClinVar 17626

      gnomAD 0.00002978 link

      VariantEvidence N/A

    1. Table 1,

      Case#: 1

      Variant: homozygous NM_014495.3:c.286_288del (ANGPTL3) p.Glu96del ← listed in Allele Registry, but paper lists it as p.Glu95del

      ClinVar: not in ClinVar

      gnomAD: total allele count: 42, allele frequency for African population with an allele count of 16: 0.0006458

      Case#: 2

      Variant: homozygous NM_014495.3(ANGPTL3):c.439_442del (p.Asn147Terfs)

      CAId: CA145485

      ClinVar: 91865

      gnomAD: 37 allele count, 0.0001966 allele frequency for European with allele count of 23

      Case#: 3 (previously report in PMID 20942659)

      Variant: compound heterozygous NM_014495.3(ANGPTL3):c.385G>T (p.Glu129Ter) and NM_014495.3(ANGPTL3):c.50_51delCCinsGA (p.Ser17Ter)

      ClinVar: 18439 (p.Ser17Ter), 18440 (p.Glu129Ter), for both variants - 1 assertion for pathogenic based on OMIM but no assertion criteria provided

      gnomAD: not in gnomAD

      Case#: 4

      Variant: compound heterozygous NM_014495.3(ANGPTL3):c.439_442del (p.Asn147Terfs) and NM_014495.3(ANGPTL3):c.883T>C (p.Phe295Leu)

      ClinVar: 91865 and 91867

      gnomAD: not in gnomAD

      Case#: 5

      Variant: heterozygous c.355_360delAACT

      ClinVar: not in ClinVar

      CAId: none

      gnomAD: not in gnomAD

      Case#: 6

      Variant: heterozygous c.62 insCTCAT

      ClinVar: not in ClinVar

      CAId: none

      gnomAD: not in gnomAD

      Case#: 7

      Variant: heterozygous NM_014495.3:c.167G>T (ANGPTL3)

      ClinVar: not in ClinVar

      CAId: CA340600195

      gnomAD: not in gnomAD

      Case#: 8

      Variant: heterozygous NM_014495.3:c.995G>A

      CAID: CA886769

      ClinVar: not in ClinVar

      gnomAD: 0.0001476 total allele freq, 37 allele count, 0.0008191 is largest allele freq for Other population with allele count of 5