Associates with the adapter-like complex 4 (AP-4) and may therefore play a role in vesicular trafficking of proteins at the trans-Golgi network.
Subcellular locations: Golgi apparatus, Trans-Golgi network membrane, Cytoplasmic vesicle, Cytoplasm, Cytosol
Extensively colocalizes with AP-4 which mediates the recruitment of TEPSIN to the trans-Golgi network.