CDC42:GTP CDC42-GDP Inactivation of Cdc42 Authored: Garapati, P V, 2008-09-05 06:02:05 Edited: Garapati, P V, 2008-09-05 06:02:05 Pubmed11672528 Pubmed16857672 Reactome Database ID Release 43428533 Reactome, http://www.reactome.org ReactomeREACT_19125 Reviewed: Kidd, T, 2009-08-18 srGAP bound to Robo's cytoplasmic tail increase the intrinsic GTPase activity of Cdc42, which converts the GTP-bound form of Cdc42 into its GDP-bound form, therefore inactivating Cdc42. Inactivation of Cdc42 leads to a reduction in the activation of the Neuronal WiskottAldrich Syndrome protein (NWASP), thus decreasing the level of active Arp2/3 complex. Because active Arp2/3 promotes actin polymerization, the reduction of active Cdc42 eventually decreases actin polymerization. Slit regulates SrGAP interaction with Robo1 and Cdc42, it increases SrGAP interaction with Cdc42.