Autophagy related 16 like 1 is a protein that in humans is encoded by the ATG16L1gene.[5] This protein is characterized as a subunit of the autophagy-related ATG12-ATG5/ATG16 complex and is essentially important for the LC3 (ATG8) lipidation and autophagosome formation. This complex localizes to the membrane and is released just before or after autophagosome completion.[6]
Furthermore, ATG16L1 appears to have other autophagy-independent functions, e.g., intracellular membrane trafficking regulation and inflammation.[6] Autophagy in general plays a crucial role in pathways leading to innate and adaptive immunity activation.[7] That is why many autophagy-related proteins, including ATG16L1, their gene expression and its role in autoimmune diseases are studied in-depth nowadays.[when?]