In the budding yeast Saccharomyces cerevisiae, the DNA damage-induced G2 arrest requires the checkpoint control genes RAD9, RAD17, RAD24, MEC1, MEC2 and MEC3. These genes also prevent entry into mitosis of a temperature-sensitive mutant, cdc13, that accumulates chromosome damage at 37 degrees C. Here we show that a cdc13 mutant overexpressing Cdc20, a beta-transducin homologue, no longer arrests in G2 at the restrictive temperature but instead undergoes nuclear division, exits mitosis and enters a subsequent division cycle, which suggests that the DNA damage-induced G2/M checkpoint control is not functional in these cells. This is consistent with our observation that overexpression of CDC20 in wild-type cells results in increased sensitivity to UV irradiation. Overproduction of Cdc20 does not influence the arrest phenotype of the cdc mutants whose cell cycle block is independent of RAD9-mediated checkpoint control. Therefore, we suggest that the DNA damage-induced checkpoint controls prevent mitosis by inhibiting the nuclear division pathway requiring CDC20 function.
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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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