Figure 7.
Role of tyrosine phosphorylation of GIT1 on paxillin binding.
The indicated GIT1/Flag tyrosine-to-phenylalanine mutants were transfected into COS7 cells together with chicken paxillin. Cells were scraped and lysed after 48 hours, and soluble lysates immunoprecipitated by addition of M2 Flag-agarose beads. The 3YF mutant is Y293F/Y392F/Y607F. Co-immunoprecipitated paxillin and endogenous β–PIX were measured by immunoblotting with specific antisera, and precipitated Flag-GIT1 directly visualized with M2 Flag-HRP conjugate.