DNA polymerase eta (Pol eta) functions in the proficient bypass of a variety of DNA lesions. Relative to the replicative polymerases, Pol eta has a greater tolerance for distorted DNA geometries and possesses a low fidelity. X-ray crystal structures and studies with nucleotide analogs have implicated interactions with the DNA minor groove as being crucial for the high fidelity of replicative DNA polymerases. To determine whether Pol eta also makes such functionally important contacts with the DNA minor groove, here we examine the effects on Pol eta-catalyzed nucleotide incorporation when 3-deazaguanine, a base analog that lacks the ability to form minor-groove hydrogen bonds with the protein, is substituted for guanine at various positions in the DNA. From these studies, we conclude that Pol eta makes only a single functional contact with the DNA minor groove at the position of the incoming nucleotide; in this regard, Pol eta differs from high-fidelity DNA polymerases that are unable to replicate through DNA lesions. These results help explain the proficient ability of Pol eta for bypassing distorting DNA lesions.
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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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