Background:The oncogenic version of Vav1 inhibits calcium signaling in T cells. Results: Oncogenic Vav1 alters the fine structure of the signaling clusters and inhibits phospholipase C␥1 (PLC␥1). Conclusion: Oncogenic mutation of Vav1 impairs Vav1 adaptor functions and interferes with PLC␥1 activation. Significance: These findings shed new light on the mechanisms underlying the adaptor-like functions of Vav1 and the effect produced by its oncogenic mutation.
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