Scientific background: |
IDS(Iduronate-2-sulfatase) is a sulfatase enzyme associated with Hunter syndrome. Iduronate 2-sulfatase is involved in the lysosomal degradation of the glycosaminoglycans heparan sulfate and dermatan sulfate. Wilson et al. (1991) used an IDS cDNA clone to localize the gene to Xq28, distal to the fragile X site. Faust et al. (1992) and Daniele et al. (1993) demonstrated that the homologous Ids gene in the mouse occupies the same position on the X chromosome in relation to the FMR1, F9, and GABRA3 genes. Iduronate-2-sulfatase is required for the lysosomal degradation of heparan sulfate and dermatan sulfate. Mutations in this X-chromosome gene that result in enzymatic deficiency lead to the sex-linked mucopolysaccharidosis type II, also known as Hunter syndrome. Iduronate-2-sulfatase has a strong sequence homology with human arylsulfatases A, B, and C, and human glucosamine-6-sulfatase. |
References: |
1. Daniele, A., Faust, C. J., Herman, G. E., Di Natale, P., Ballabio, A. Cloning and characterization of the cDNA for the murine iduronate sulfatase gene. Genomics 16: 755-757, 1993.
2. Faust, C. J., Verkerk, A. J. M. H., Wilson, P. J., Morris, C. P., Hopwood, J. J., Oostra, B. A., Herman, G. E. Genetic mapping on the mouse X chromosome of human cDNA clones for the fragile X and Hunter syndromes. Genomics 12: 814-817, 1992.
3. Wilson, P. J., Suthers, G. K., Callen, D. F., Baker, E., Nelson, P. V., Cooper, A., Wraith, J. E., Sutherland, G. R., Morris, C. P., Hopwood, J. J. Frequent deletions at Xq28 indicate genetic heterogeneity in Hunter syndrome. Hum. Genet. 86: 505-508, 1991.
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