S -Nitrosoglutathione and Endothelial Nitric Oxide Synthase-Derived Nitric Oxide Regulate Compartmentalized Ras S -Nitrosylation and Stimulate Cell Proliferation

S-nitrosylation of H-Ras at Cys(118) and the activation of Src kinase are spatiotemporally linked events of the S-nitrosothiol-mediated signaling pathway that occurs at the plasma membrane and at the Golgi. The nonparticipation of Src kinase and the localized production of NO by endothelial NO synthase at the plasma membrane limited NO-mediated Ras activation to the plasma membrane.