Atg8, a member of a novel ubiquitin-like protein family, is an essential component of the autophagic machinery in yeast. This protein undergoes reversible conjugation to phosphatidylethanolamine through a multistep process in which cleavage of Atg8 by a specific protease is followed by ubiquitin-like conjugation processes. Here, we identify two essential sites in Atg8, one of them involving residues Phe 77 and Phe 79 and the other, located on the opposite surface of Atg8, residues Tyr 49 and Leu 50. We show that these two sites are associated with different functions of Atg8: Phe 77 and Phe 79 seem to be part of the recognition site for Atg4, a cystein protease that acts also as a deubiquitination enzyme, whereas Tyr 49 and Leu 50 act downstream of the lipidation step. These two newly identified distinct sites that are essential for Atg8 activity provide an explanation for the many protein-protein interactions of this low-molecular-weight protein.
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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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