Predicted to enable GTP binding activity and GTPase activity. Involved in cell migration; melanosome transport; and substrate adhesion-dependent cell spreading. Located in Golgi apparatus and melanosome. Is expressed in several structures, including diaphragm and genitourinary system. Used to study dilated cardiomyopathy. Orthologous to human RAB1A (RAB1A, member RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]