During normal DNA replication, the proliferating cell nuclear antigen (PCNA) enhances the processivity of DNA polymerases at the replication fork. When DNA damage is encountered, PCNA is monoubiquitinated on Lys-164 by the Rad6-Rad18 complex as the initiating step of translesion synthesis. DNA damage bypass by the translesion synthesis polymerase Rev1 is enhanced by the presence of ubiquitinated PCNA. Here we have carried out a mutational analysis of Rev1, and we have identified the functional domain in the C terminus of Rev1 that mediates interactions with PCNA. We show that a unique motif within this domain binds the ubiquitin moiety of ubiquitinated PCNA. Point mutations within this ubiquitin-binding motif of Rev1 (L821A,P822A,I825A) abolish its functional interaction with ubiquitinated PCNA in vitro and strongly attenuate damage-induced mutagenesis in vivo. Taken together, these studies suggest a specific mechanism by which the interaction between Rev1 and ubiquitinated PCNA is stabilized during the DNA damage response.
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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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