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A novel missense mutation (1565G-->A) was identified in the cDNA and genomic DNA coding for the beta-hexosaminidase beta-subunit of a Japanese patient with infantile Sandhoff disease. The patient was homozygous for this mutation, which should result in a cysteine-to-tyrosine substitution at codon
beta-hexosaminidase B is an enzyme that is involved in the degradation of glycolipids and glycans in the lysosome. Mutation in the HEXB gene lead to Sandhoff disease, a glycolipid storage disorder characterized by severe neurodegeneration. So far, little structural information on the protein is
By comparing mRNA profiles in cultured fibroblasts from patients affected with lysosomal storage diseases, we identified differentially expressed genes common to these conditions. These studies, confirmed by biochemical experiments, demonstrated that lysosomal storage is associated with