Cells activate DNA repair pathways and cell cycle checkpoints when they suffer damage to their genome. They also activate tolerance pathways that facilitate survival. In Escherichia coli, a mechanism known as postreplication repair (PRR) is used to bypass lesions that would otherwise present a physical block to DNA polymerase. PRR has also been proposed to occur in eukaryotic cells, although the partitioning of DNA synthesis to a discrete S-phase would suggest that it is only operative within a defined period of the cell cycle. Eukaryotic PRR has been most extensively studied in the budding yeast Saccharomyces cerevisiae. Two important genes for components of this repair pathway are RAD6, which encodes an ubiquitin-conjugating enzyme, and RAD18, which encodes a RING-finger protein and forms a heterodimer with Rad6p. Rad18p can also bind to DNA. We report here the identification of the Schizosaccharomyces pombe homologue of RAD18, which we have denoted rhp18. rhp18 mutants are hypersensitive to DNA-damaging agents, but show this hypersensitivity throughout the cell cycle. rhp18 mutants are characterised by a longer than usual DNA damage checkpoint arrest that is required for their residual viability following irradiation. Genetic analyses show that rhp18 controls a unique DNA damage repair/tolerance pathway that extends beyond the requirement to tolerate damage during S-phase, suggesting a broader definition of the function of this eukaryotic PRR 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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