Although mammals encode multiple family X DNA polymerases implicated in DNA repair, Saccharomyces cerevisiae has only one, DNA polymerase IV (pol IV). To better understand the repair functions of pol IV, here we characterize its biochemical properties. Like mammalian pol beta and pol lambda, but not pol mu, pol IV has intrinsic 5'-2-deoxyribose-5-phosphate lyase activity. Pol IV has low processivity and can fill short gaps in DNA. Unlike the case with pol beta and pol lambda, the gap-filling activity of pol IV is not enhanced by a 5'-phosphate on the downstream primer but is stimulated by a 5'-terminal synthetic abasic site. Pol IV incorporates rNTPs into DNA with an unusually high efficiency relative to dNTPs, a property in common with pol mu but not pol beta or pol lambda. Finally, pol IV is highly inaccurate, with an unusual error specificity indicating the ability to extend primer termini with limited homology. These properties are consistent with a possible role for pol IV in base excision repair and with its known role in non-homologous end joining of double strand breaks, perhaps including those with damaged ends.
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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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