DPB11, a gene that suppresses mutations in two essential subunits of Saccharomyces cerevisiae DNA polymerase II(epsilon) encoded by POL2 and DPB2, was isolated on a multicopy plasmid. The nucleotide sequence of the DPB11 gene revealed an open reading frame predicting an 87-kDa protein. This protein is homologous to the Schizosaccharomyces pombe rad4+/cut5+ gene product that has a cell cycle checkpoint function. Disruption of DPB11 is lethal, indicating that DPB11 is essential for cell proliferation. In thermosensitive dpb11-1 mutant cells, S-phase progression is defective at the nonpermissive temperature, followed by cell division with unequal chromosomal segregation accompanied by loss of viability.dpb11-1 is synthetic lethal with any one of the dpb2-1, pol2-11, and pol2-18 mutations at all temperatures. Moreover, dpb11 cells are sensitive to hydroxyurea, methyl methanesulfonate, and UV irradiation. These results strongly suggest that Dpb11 is a part of the DNA polymerase II complex during chromosomal DNA replication and also acts in a checkpoint pathway during the S phase of the cell cycle to sense stalled DNA replication.
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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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