Plays a role in the regulation of starvation-induced autophagosome formation (PubMed:22613832). Together with the TRAPPIII complex, regulates a constitutive trafficking step from peripheral recycling endosomes to the early Golgi, maintaining the cycling pool of ATG9 required for initiation of autophagy. Interacts with ULK1 (PubMed:22613832). May interact with RAB11A and RAB11B, but does not exhibit any GTPase-activating activity toward these proteins (PubMed:22613832). Interacts with TRAPPC8 (PubMed:26711178). After amino acid starvation, Golgi apparatus-associated protein levels increase compared with fed conditions. May be cycling between the Golgi apparatus and an endosomal pool, redistributing to the Golgi apparatus upon starvation. Truncated N-terminus. Extended N-terminus.