Plays a role in endocytosis and/or membrane trafficking at the trans-Golgi network (TGN) (PubMed:15758025). May act by linking the adapter protein complex AP-1 to other proteins (Probable). Component of clathrin-coated vesicles (PubMed:15758025). Component of the aftiphilin/p200/gamma-synergin complex, which plays roles in AP1G1/AP-1-mediated protein trafficking including the trafficking of transferrin from early to recycling endosomes, and the membrane trafficking of furin and the lysosomal enzyme cathepsin D between the trans-Golgi network (TGN) and endosomes (PubMed:15758025).
