Vav: A potential link between tyrosine kinases and Ras‐like GTPases in hematopoietic cell signaling

Bioessays 15 (3):179-183 (1993)
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Abstract

The vav proto‐oncogene encodes a 95 kDa protein which is expressed exclusively in hematopoietic cells. Analysis of the deduced amino acid sequence has revealed the presence of a src‐homology 2 (SH2) domain, 2 SH3 domains, a cysteine‐rich region with similarity to protein kinase C, and a region highly similar to proteins with guanine nucleotide exchange activity on ras‐like GTPases. Recent work has shown that vav is tyrosine phosphorylated in response to stimulation of surface membrane receptors in a variety of hematopoietic cell lines. Vav may play a role in hematopoietic cell signaling by coupling tyrosine kinase pathways to ras‐like GTPases through the regulation of guanine nucleotide exchange.

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