 This gene encodes a member of the exophilin subfamily of Rab effector proteins.The protein forms a ternary complex with the small Ras-related GTPase Rab27A in its GTP-bound form and the motor protein myosin Va. A similar protein complex in mouse functions to tether pigment-producing organelles called melanosomes to the actin cytoskeleton in melanocytes, and is required for visible pigmentation in the hair and skin.In melanocytic cells MLPH gene expression may be regulated by MITF.