Mitochondria are essential organelles that produce most of the energy for a cell, but concomitantly accumulate oxidative damage. Degradation of damaged mitochondria is critical for cell homeostasis, and this process is thought to be mediated by mitophagy, an autophagy-related pathway specific for mitochondria. However, whether mitochondria are selectively degraded, and how the autophagic machinery is targeted to mitochondria, remain largely unknown. Here we demonstrate that, in post-log phase cells under respiratory conditions, a substantial fraction of mitochondria are exclusively sequestered as cargoes and transported to the vacuole, a lytic compartment in yeast, in an autophagy-dependent manner. Interestingly, we found Atg32, a mitochondria-anchored protein essential for mitophagy that is induced during respiratory growth. In addition, our data suggest that Atg32 interacts with Atg8 and Atg11, autophagy-related proteins critical for recognition of cargo receptors. We propose that Atg32 acts as a mitophagy-specific receptor and regulates selective degradation of mitochondria.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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Evidence ID | Analyze ID | File | Description |
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