Putative Rab GTPase-activating protein which plays a role in vesicular trafficking. Involved in endosome-to-Golgi trafficking. Acts as a bridging protein by binding simultaneously to golgins, located at the trans-Golgi, and to the WASH complex, located on endosome-derived vesicles (By similarity). Plays a role in brain development (By similarity). May act as a general inhibitor of innate immunity signaling (By similarity).