A heterotetrameric AP-type membrane coat adaptor complex that consists of beta3, delta, mu3 and sigma3 subunits and is found associated with endosomal membranes. AP-3 does not appear to associate with clathrin in all organisms. In at least humans, the AP-3 complex can be heterogeneric due to the existence of multiple subunit isoforms encoded by different genes (beta3A and beta3B, mu3A and mu3B, and sigma3A and sigma3B). [GOC:mah, PMID:10611976, PMID:21097499]
Full description or abstract
Collection
C5: Ontology GO: Gene Ontology GO:CC: GO Cellular Component
