Involved in the regulation of cell survival. Promotes invasive migration of cells in which it functions to localize and maintain integrin alpha-V/beta-1 at the tips of extending pseudopodia. Involved in the regulation of epithelial morphogenesis through the control of CLDN4 expression and localization at tight junctions (By similarity). May selectively regulate the apical recycling pathway. Together with MYO5B regulates transcytosis (By similarity). Interacts with RAB11FIP1, RAB11FIP2, RAB11FIP3 and RAB11FIP4. Interacts (via the hypervariable C-terminal region) with ITGB1 (via the cytoplasmic region); the interaction is GTP-dependent. Interacts with ITGAV. Associates with the integrin alpha-V/beta-1 heterodimer. Colocalizes with integrin alpha-V/beta-1 in vesicles at the pseudopodial tips. Belongs to the small GTPase superfamily. Rab family.