Title : Ras recruits Raf-1 to the plasma membrane for activation by tyrosine phosphorylation.

Pub. Date : 1995 Jul 3

PMID : 7542586






4 Functional Relationships(s)
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1 We show that in mammalian cells activation of p74Raf-1 by oncogenic Src requires pp60Src to be myristoylated and the ability of p74Raf-1 to interact with p21Ras-GTP. Guanosine Triphosphate HRas proto-oncogene, GTPase Homo sapiens
2 The Ras/Raf interaction is required for p21Ras-GTP to bring p74Raf-1 to the plasma membrane for phosphorylation at tyrosine 340 or 341, probably by membrane-bound pp60Src. Guanosine Triphosphate HRas proto-oncogene, GTPase Homo sapiens
3 Thus, p21Ras-GTP is the limiting component in bringing p74Raf-1 to the plasma membrane for tyrosine phosphorylation. Guanosine Triphosphate HRas proto-oncogene, GTPase Homo sapiens
4 Using mutants of Raf-1 at Tyr340/341, we show that in addition to tyrosine phosphorylation at these sites, there is an additional activation step resulting from p21Ras-GTP recruiting p74Raf-1 to the plasma membrane. Guanosine Triphosphate HRas proto-oncogene, GTPase Homo sapiens