Autophagosome formation is a central event in macroautophagy. The Apg12-Apg5 conjugate, which is essential in this process, is generated by a ubiquitin-like protein conjugation system. In yeast, Apg12, following activation by the E1-like Apg7, forms a thioester with Apg10 (E2-like). Apg12 is finally conjugated to Apg5 via an isopeptide bond. The possible requirement of an E3-like protein for the conjugation, however, has not yet been confirmed. The Apg12 system is conserved among eukaryotes, although a mammalian counterpart of Apg10 has not yet been identified. Here, we report the identification and characterization of the mouse Apg10 ortholog. A yeast two-hybrid screen using the mouse Apg5 (mApg5) as bait identified a novel protein with 19% identity to yeast Apg10. We designated this protein mouse Apg10 (mApg10). We demonstrated by a modified yeast two-hybrid assay that mApg10 mediates the conjugation of mApg12 and mApg5. The in vivo interaction of mApg12 with mApg10 in HeLa cells suggests that mApg10 is an Apg12-conjugating enzyme, likely serving as an Apg5-recognition molecule in the Apg12 system. This novel two-hybrid method, which we have named 'conjugation-mediated yeast two-hybrid', proves to be a simple and useful technique with which to analyze protein-protein conjugation.
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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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