Predicted to enable several functions, including AP-1 adaptor complex binding activity; AP-3 adaptor complex binding activity; and BLOC-2 complex binding activity. Predicted to be involved in several processes, including endosome to melanosome transport; positive regulation of phosphatidylcholine biosynthetic process; and vesicle organization. Predicted to act upstream of or within protein transport. Located in melanosome. Is expressed in alimentary system; axial skeleton; lung; sensory organ; and skin. Orthologous to human RAB38 (RAB38, member RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]