The function of ENSG00000174236 (REP15, RAB15 effector protein) is as follows. Effector that interacts with Rab GTPases in their active form (GTP-bound) including RAB15, RAB3A-D and RAB34. Controls downstream signaling such as cell proliferation and cell migration (PubMed:35871249). Also regulates transferrin receptor recycling from the endocytic recycling compartment (PubMed:16195351, PubMed:35871249). .