Predicted to enable GTP binding activity and GTPase activity. Predicted to be involved in several processes, including cellular response to insulin stimulus; protein localization to plasma membrane; and secretion by cell. Predicted to act upstream of or within protein transport. Predicted to be located in cilium; endosome membrane; and perinuclear region of cytoplasm. Predicted to be active in Golgi apparatus; cytoplasmic vesicle; and plasma membrane. Is expressed in several structures, including 1st branchial arch; cerebellum external granule cell layer; embryo endoderm; neural tube; and vibrissa. Orthologous to human RAB15 (RAB15, member RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]