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- Title
Nix is a selective autophagy receptor for mitochondrial clearance.
- Authors
Novak, Ivana; Kirkin, Vladimir; McEwan, David G; Zhang, Ji; Wild, Philipp; Rozenknop, Alexis; Rogov, Vladimir; Löhr, Frank; Popovic, Doris; Occhipinti, Angelo; Reichert, Andreas S; Terzic, Janos; Dötsch, Volker; Ney, Paul A; Dikic, Ivan
- Abstract
Autophagy is the cellular homeostatic pathway that delivers large cytosolic materials for degradation in the lysosome. Recent evidence indicates that autophagy mediates selective removal of protein aggregates, organelles and microbes in cells. Yet, the specificity in targeting a particular substrate to the autophagy pathway remains poorly understood. Here, we show that the mitochondrial protein Nix is a selective autophagy receptor by binding to LC3/GABARAP proteins, ubiquitin-like modifiers that are required for the growth of autophagosomal membranes. In cultured cells, Nix recruits GABARAP-L1 to damaged mitochondria through its amino-terminal LC3-interacting region. Furthermore, ablation of the Nix:LC3/GABARAP interaction retards mitochondrial clearance in maturing murine reticulocytes. Thus, Nix functions as an autophagy receptor, which mediates mitochondrial clearance after mitochondrial damage and during erythrocyte differentiation.
- Publication
EMBO reports, 2010, Vol 11, Issue 1, p45
- ISSN
1469-3178
- Publication type
Journal Article
- DOI
10.1038/embor.2009.256