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Ann Hum Genet. 1995 Jan;59(1):25-37.

Identification of VAV2 on 9q34 and its exclusion as the tuberous sclerosis gene TSC1.

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Division of Experimental Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.


A novel widely expressed homologue of the VAV oncogene, VAV2 (53% identical residues), has been identified within the critical region for the tuberous sclerosis gene, TSC1, on human chromosome 9q34. By Southern blot analysis, analysis of allele-specific transcription, and direct sequencing of the VAV2 mRNA/cDNA from patient lymphoblastoid cell lines, we demonstrate that both alleles of this gene are expressed in TSC patients and there are no significant mutations. VAV consists of a novel array of signalling domains and is thought to play an important role in signal transduction in haematopoietic tissues where it is exclusively expressed. VAV2 is likely to serve a similar role more generally in mammalian cells, but is not the TSC1 gene.

[Indexed for MEDLINE]

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