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Comparative Study
. 1993 Dec 31;75(7):1305-15.
doi: 10.1016/0092-8674(93)90618-z.

Identification and characterization of the tuberous sclerosis gene on chromosome 16

European Chromosome 16 Tuberous Sclerosis Consortium
Comparative Study

Identification and characterization of the tuberous sclerosis gene on chromosome 16

European Chromosome 16 Tuberous Sclerosis Consortium. Cell. .

Abstract

Tuberous sclerosis (TSC) is an autosomal dominant multisystem disorder with loci assigned to chromosomes 9 and 16. Using pulsed-field gel electrophoresis (PFGE), we identified five TSC-associated deletions at 16p13.3. These were mapped to a 120 kb region that was cloned in cosmids and from which four genes were isolated. One gene, designated TSC2, was interrupted by all five PFGE deletions, and closer examination revealed several intragenic mutations, including one de novo deletion. In this case, Northern blot analysis identified a shortened transcript, while reduced expression was observed in another TSC family, confirming TSC2 as the chromosome 16 TSC gene. The 5.5 kb TSC2 transcript is widely expressed, and its protein product, tuberin, has a region of homology to the GTPase-activating protein GAP3.

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