We have analyzed the effects of temperature-sensitivity (ts)-conferring mutations in the Saccharomyces cerevisiae DNA polymerase I-encoding gene on cell growth, in vivo DNA synthesis, intrachromosomal gene conversion and pop-out recombination. Also, we have identified the molecular defect responsible for the ts phenotype. Two mutant alleles (cdc17-1, cdc17-2) were originally identified as cell-cycle mutations, while a third mutation (hpr3) was found during a genetic screening for mutants with a hyper-recombination phenotype. Both cdc17-2 and hpr3 cells complete one round of cell division and DNA replication after shift to nonpermissive temperature, before being arrested as dumbbell-shaped cells. Conversely, the cdc17-1 mutation immediately blocks growth and DNA synthesis at 37 degrees C. No substantial difference was observed in the frequency of intrachromosomal gene conversion and pop-out recombination events, when hpr3 and cdc17-1 were compared to the previously characterized pol1-1 mutant. These two frequencies were ten- to 30-fold above wild-type level at semipermissive temperature. In each mutant, a single bp substitution, causing the replacement of Gly residues by either Asp (cdc17-1, cdc17-2) or Glu (hpr3) in yeast DNA polymerase I is responsible for the ts phenotype.
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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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