Kiyono et al., J Biol Chem 2000
:
Tyrosine phosphorylation of Ras-GRF1 is critical for the induction of Rac-GEF activity as evidenced by inhibition by tyrosine kinase inhibitors ... Herein, we show that the nonreceptor tyrosine kinase Src phosphorylates Ras-GRF1 , thereby inducing Rac-GEF activity
Yang et al., Mol Biol Cell 2006
:
These results suggest that coordinated activation of H-Ras and Rac1 by Ras-GRF1 may be a significant controller of neuronal cell size