Checkpoint controls exist in eukaryotic cells to ensure that cells do not enter mitosis in the presence of DNA damage or unreplicated chromosomes. In Schizosaccharomyces pombe many of the checkpoint genes analysed to date are required for both the DNA damage and the replication checkpoints, an exception being chk1 . We report here on the characterization of nine new methylmethane sulphonate (MMS)-sensitive S.pombe mutants, one of which is defective in the DNA damage checkpoint but not the replication checkpoint. We have cloned and sequenced the corresponding gene. The predicted protein is most similar to the Saccharomyces cerevisiae Rad9 protein, having 46% similarity and 26% identity. The S.pombe protein, which we have named Rhp9 (Rad9 homologue in S. pombe) on the basis of structural and phenotypic similarity, also contains motifs present in BRCA1 and 53BP1. Deletion of the gene is not lethal and results in a DNA damage checkpoint defect. Epistasis analysis with other S.pombe checkpoint mutants indicates that rhp9 acts in a process involving the checkpoint rad genes and that the rhp9 mutant is phenotypically very similar to chk1.
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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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