Srs2 helicase is known to dismantle nucleofilaments of Rad51 recombinase to prevent spurious recombination events and unwind trinucleotide sequences that are prone to hairpin formation. Here we document a new, unexpected genome maintenance role of Srs2 in the suppression of mutations arising from mis-insertion of ribonucleoside monophosphates during DNA replication. In cells lacking RNase H2, Srs2 unwinds DNA from the 5' side of a nick generated by DNA topoisomerase I at a ribonucleoside monophosphate residue. In addition, Srs2 interacts with and enhances the activity of the nuclease Exo1, to generate a DNA gap in preparation for repair. Srs2-Exo1 thus functions in a new pathway of nick processing-gap filling that mediates tolerance of ribonucleoside monophosphates in the genome. Our results have implications for understanding the basis of Aicardi-Goutières syndrome, which stems from inactivation of the human RNase H2 complex.
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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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