Chromosomal localization of the human α-L-iduronidase gene (IDUA) to 4p16.3

Hamish S. Scott, Lesley J. Ashton, Helen J. Eyre, Elizabeth Baker, Doug A. Brooks, David F. Callen, Grant R. Sutherland, Phillip Morris, John J. Hopwood

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The lysosomal hydrolase α-L-iduronidase (IDUA) is one of the enzymes in the metabolic pathway responsible for the degradation of the glycosaminoglycans heparan sulfate and dermatan sulfate. In humans a deficiency of IDUA leads to the accumulation of glycosaminoglycans, resulting in the lysosomal storage disorder mucopolysaccharidosis type I. A genomic subclone and a cDNA clone encoding human IDUA were used to localize IDUA to chromosome 4p16.3 by in situ hybridization and this was confirmed by Southern blot analysis. This localization is different from that of a previous report mapping IDUA to chromosome 22 and places the gene for IDUA in the same region of chromosome 4 as the Huntington disease gene. Measurement of expressed human IDUA activity in human-mouse hybrid cell lines confirmed that IDUA is on chromosome 4.

Original languageEnglish
Pages (from-to)802-807
Number of pages6
JournalAmerican Journal of Human Genetics
Issue number5
Publication statusPublished or Issued - 21 Nov 1990
Externally publishedYes

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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