Part of the AP-3 complex, an adapter-related complex which is not clathrin-associated. The complex is associated with the Golgi region as well as more peripheral structures. It facilitates the budding of vesicles from the Golgi membrane and may be directly involved in trafficking to lysosomes.
Synonyms: AP-3 complex subunit sigma-3B, Adapter-related protein complex 3 sigma-2 subunit, Sigma-3B-adaptin, Sigma3B-adaptin, Sigma-adaptin 3b
Gene name: AP3S2