AP-5 is associated with 2 proteins, SPG11 and SPG15, which have some structural similarity to clathrin, and may form the coat around the AP-5 complex, but the ultrastructure of that coat is not known.
A AP-5 está asociada con dúas proteínas, SPG11 e SPG15, que teñen certa semellanza estrutural coa clatrina, e poden formar o revestimento arredor do complexo AP-5, pero a ultraestrutura do revestimento non se coñece.