Download MendeleyStructural basis for ATG9A recruitment to the ULK1 complex in mitophagy initiation.
Ren, X., Nguyen, T.N., Lam, W.K., Buffalo, C.Z., Lazarou, M., Yokom, A.L., Hurley, J.H.(2023) Sci Adv 9: eadg2997-eadg2997
- PubMed: 36791199
- DOI: https://doi.org/10.1126/sciadv.adg2997
- Primary Citation of Related Structures:
8DO8 - PubMed Abstract:
The assembly of the autophagy initiation machinery nucleates autophagosome biogenesis, including in the PINK1- and Parkin-dependent mitophagy pathway implicated in Parkinson's disease. The structural interaction between the sole transmembrane autophagy protein, autophagy-related protein 9A (ATG9A), and components of the Unc-51-like autophagy activating kinase (ULK1) complex is one of the major missing links needed to complete a structural map of autophagy initiation. We determined the 2.4-Å x-ray crystallographic structure of the ternary structure of ATG9A carboxyl-terminal tail bound to the ATG13:ATG101 Hop1/Rev7/Mad2 (HORMA) dimer, which is part of the ULK1 complex. We term the interacting portion of the extreme carboxyl-terminal part of the ATG9A tail the "HORMA dimer-interacting region" (HDIR). This structure shows that the HDIR binds to the HORMA domain of ATG101 by β sheet complementation such that the ATG9A tail resides in a deep cleft at the ATG13:ATG101 interface. Disruption of this complex in cells impairs damage-induced PINK1/Parkin mitophagy mediated by the cargo receptor NDP52.
Organizational Affiliation:
Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA.
