Predicted to enable GTPase activity. Predicted to be involved in exocytosis. Predicted to act upstream of or within intracellular signal transduction. Predicted to be active in endosome; plasma membrane; and synaptic vesicle. Is expressed in central nervous system; cranial ganglion; forebrain; and retina. Orthologous to human RAB40C (RAB40C, member RAS oncogene family).