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ATG9A

Involved in autophagy and cytoplasm to vacuole transport (Cvt) vesicle formation. Plays a key role in the organization of the preautophagosomal structure/phagophore assembly site (PAS), the nucleating site for formation of the sequestering vesicle. Cycles between a juxta-nuclear trans-Golgi network compartment and late endosomes. Nutrient starvation induces accumulation on autophagosomes. Starvation-dependent trafficking requires ULK1, ATG13 and SUPT20H.
Protein class

Transporters

Predicted location

Membrane

Single cell type specificity

Cell type enhanced (Late spermatids, Early spermatids)

Immune cell specificity

Low immune cell specificity

Cell line specificity

Low cell line specificity

Interaction

Homotrimer; forms a homotrimer with a central pore that forms a path between the two membrane leaflets (PubMed:32610138, PubMed:33106659). Interacts (via cytoplasmic its C-terminus) with ATG2A (PubMed:32610138, PubMed:33106659). Interacts with SUPT20H (PubMed:19893488). Interacts (via the tyrosine-based sorting signal motif) with AP4M1; promoting association with the AP-4 complex (PubMed:29180427). Interacts with ARFIP1 and ARFIP2 (PubMed:30917996). Interacts with PI4K2A and PI4KB (PubMed:30917996). Interacts with ATG4A; the interaction is direct and promotes ATG9A trafficking (PubMed:33773106).

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