Figure 6From: The scaffolding protein GRASP/Tamalin directly binds to Dock180 as well as to cytohesins facilitating GTPase crosstalk in epithelial cell migrationA comprehensive model for the dual action of GRASP and CNK3/IPCEF in promoting Arf to Rac crosstalk. GRASP and CNK3/IPCEF play distinct roles in bringing this multiprotein complex together. One of the scaffolds, CNK3/IPCEF recruits cytohesin 2 to the membrane in response to upstream signals (HGF) while the other, GRASP, binds both cytohesin 2 and Dock180 providing a physical bridge. Assembly of this complex promotes HGF-stimulated Rac activation and migration.Back to article page