The Pol32 subunit of S. cerevisiae DNA polymerase (Pol) delta plays an important role in replication and mutagenesis. Here, by measuring the CAN1 forward mutation rate, we found that either POL32 or REV3 (which encodes the Pol zeta catalytic subunit) inactivation produces overlapping antimutator effects against rad mutators belonging to three epistasis groups. In contrast, the msh2Delta pol32Delta double mutant exhibits a synergistic mutator phenotype. Can(r) mutation spectrum analysis of pol32Delta strains revealed a substantial increase in the frequency of deletions and duplications (primarily deletions) of sequences flanked by short direct repeats, which appears to be RAD52 and RAD10 independent. To better understand the pol32Delta and rev3Delta antimutator effects in rad backgrounds and the pol32Delta mutator effect in a msh2Delta background, we determined Can(r) mutation spectra for rad5Delta, rad5Delta pol32Delta, rad5Delta rev3Delta, msh2Delta, msh2Delta pol32Delta, and msh2Delta rev3Delta strains. Both rad5Delta pol32Delta and rad5Delta rev3Delta mutants exhibit a reduction in frameshifts and base substitutions, attributable to antimutator effects conferred by the pol32Delta and rev3Delta mutations. In contrast, an increase in these two types of alterations is attributable to a synergistic mutator effect between the pol32Delta and msh2Delta mutations. Taken together, these observations indicate that Pol32 is important in ensuring genome stability and in mutagenesis.
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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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