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Updated: May 14, 2026

Imaging ATG9A, a Multi-Spanning Membrane Protein
Published on: June 16, 2023
FIP200 regulates targeting of Atg16L1 to the isolation membrane
Taki Nishimura1, Takeshi Kaizuka, Ken Cadwell
1Department of Physiology and Cell Biology, Tokyo Medical and Dental University, Tokyo 113-8519, Japan.
Abstract:
Autophagosome formation is a dynamic process that is strictly controlled by autophagy-related (Atg) proteins. However, how these Atg proteins are recruited to the autophagosome formation site or autophagic membranes remains poorly understood. Here, we found that FIP200, which is involved in proximal events, directly interacts with Atg16L1, one of the downstream Atg factors, in an Atg14- and phosphatidylinositol 3-kinase-independent manner. Atg16L1 deletion mutants, which lack the FIP200-interacting domain, are defective in proper membrane targeting. Thus, FIP200 regulates not only early events but also late events of autophagosome formation through direct interaction with Atg16L1.
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