Abstract
Tuberous sclerosis complex (TSC) is an autosomal dominant disorder characterized by the widespread development of distinctive tumors termed hamartomas. TSC-determining loci have been mapped to chromosomes 9q34 (TSC1) and 16p13 (TSC2). The TSC1 gene was identified from a 900-kilobase region containing at least 30 genes. The 8.6kilobase TSC1 transcript is widely expressed and encodes a protein of 130 kilodaltons (hamartin) that has homology to a putative yeast protein of unknown function. Thirty-two distinct mutations were identified in TSC1, 30 of which were truncating, and a single mutation (2105delAAAG) was seen in six apparently unrelated patients. In one of these six, a somatic mutation in the wild-type allale was found in a TSC- associated renal carcinoma, which suggests that hamartin acts as a tumor suppressor.
Original language | English |
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Pages (from-to) | 805-808 |
Number of pages | 4 |
Journal | Science |
Volume | 277 |
Issue number | 5327 |
DOIs | |
Publication status | Published - 8 Aug 1997 |
Externally published | Yes |