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  2. pubmed.ncbi.nlm.nih.gov pubmed.ncbi.nlm.nih.gov
    Mutational analysis of 85 mucopolysaccharidosis type I families: frequency of known mutations, identification of 17 novel mutations and in vitro expression of missense mutations
    1
    1. ClingenBaseline 24 Oct 2026
      Y167X

      Case#: Family 28, India

      DiseaseAssertion: MPS1-S

      FamilyInfo: N/A

      CasePresentingHPOs: N/A

      CaseHPOFreeText: The Scheie phenotype is characterized by aortic valve disease, corneal clouding, limited skeletal problems, but no mental retardation. This is a general assessment and not specific to this patient.

      CaseNotHPOs: N/A

      CaseNotHPOFreeText: N/A

      CaseEnzymeAssay: The α-L-iduronidase enzyme activities in leucocytes from all patients in the study was measured using the artificial substrate 4-methylumbelliferyl α-L iduronide (Sigma). Values ranged from 0 to 2.47 nmol/h/mg protein (reference range: 28–92 nmol/h/mg protein) and did not correlate to the clinical phenotype.

      α-L-iduronidase activity in COS-7 cells transiently transfected with wild-type or mutagenised cDNAs. α-L-iduronidase activity: 4.5 nmol/h/mg cell protein; values are the means of two experiments.

      CaseUrineGAGs: N/A

      CaseERT: N/A

      CaseBMT: N/A

      Variant1: c.501C>G (p.Y167X)

      Variant1ClinVarID: 92644

      Variant1CAID: CA220511

      Variant2: c.614G>A (p.C205Y)

      Variant2ClinVarID: 1468875

      Variant2CAID: CA355961928

      AdditionalVariants: N/A

      ParentalGenotype: N/A

      PreviouslyPublished N/A

      Gene:IDUA CaseInfo DiseaseEntity:MPS1 ClinVarID:92644 CAID:CA220511 ClinVarID:1468875 CAID:CA355961928 inferred_gene_hgnc:5391 inferred_gene_source:CAID IDUA variant annotation
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    pubmed.ncbi.nlm.nih.gov/11735025/