SOS1, recruited to activated MET receptor via interaction of GRB2 with phosphorylated SHC1-2, catalyzes guanyl nucleotide exchange on RAS from GDP to GTP, resulting in RAS activation (Pelicci et al. 1995).
Bardelli, A, Zhen, Z, Waterfield, MD, Lanfrancone, L, Salcini, AE, Ponzetto, C, Giordano, S, Pelicci, G, Pelicci, PG, Panayotou, G
guanyl-nucleotide exchange factor activity of HGF:p-4Y-MET dimer:p-Y317-SHC1-2:GRB2:SOS1 [plasma membrane]
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