Small GTPase which cycles between an active GTP-bound and an inactive GDP-bound state (By similarity). Involved in protein transport. Plays a role in vesicular traffic. Mediates VEGFR2 endosomal trafficking to enhance VEGFR2 signaling (By similarity). GTP + H2O = GDP + H(+) + phosphate Generally associated with membranes. Cytoplasmic when phosphorylated by CDK1. Belongs to the small GTPase superfamily. Rab family. Extended N-terminus.