Predicted to enable GDP binding activity and GTPase activity. Involved in several processes, including immunoglobulin transcytosis in epithelial cells mediated by polymeric immunoglobulin receptor; melanosome transport; and regulation of plasma membrane bounded cell projection organization. Located in several cellular components, including apical plasma membrane; basolateral plasma membrane; and cytoplasmic vesicle. Is expressed in several structures, including alimentary system; brain; metanephros; olfactory epithelium; and testis. Orthologous to human RAB17 (RAB17, member RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]