Interactions of oxoGuanine-DNA glycosylases from Escherichia coli (Fpg) and human (OGG1) and abasic site endonucleases from yeast (Apnl) and E. coli (Nfo) with oligodeoxyribonucleotides containing oxoGuanine (oxoG) and tetrahydrofuran (F, a stable analog of an abasic site) separated by various numbers of nucleotides have been studied. Inhibitor analysis has shown that the affinity of Fpg for single-stranded ligands does not depend on the relative positions of oxoG and F lesions. KM and kcat values have been determined for all double-stranded substrates and all enzymes under study. The effect of introducing the second lesion was strongly dependent on the relative positions of the lesions and the nature of the enzyme. The highest drop in the affinity (1.6-148-fold) and the reaction rate (4.8-58-fold) has been observed with Fpg and OGG1 for substrates containing F immediately 5' or 3' adjacent to oxoG. Introduction of the second lesion barely changed the KM values for Apnl and Nfo substrates. At the same time, the reaction rates were 5-10-fold lower for substrates containing two adjacent lesions. For all enzymes studied, increasing the distance between two lesions in duplex DNA reduced the effect of the lesion in KM and kcat values.
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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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