Yeast can be readily transformed by single-stranded oligonucleotides (ssOligos). Previously, we showed that an ssOligo that generates a 1-nt loop containing an AP site corrected the -1 frameshift mutation in the lys2DeltaA746 allele. However, these experiments had to be performed in yeast apn1 mutants lacking the major AP endonuclease. In this study, we show that bypass of an AP site can be studied in repair-proficient yeast by using ssOligos that generates a 7-nt loop containing an AP site. The bypass studies performed using the ssOligos that generate a 7-nt loop was validated by demonstrating that the result obtained is similar to those derived using ssOligos containing a 1-nt loop in an apn1 mutant. By using the 7-nt loop system, we showed that the bypass efficiencies of AP sites are dependent on the sequence context that surrounds the lesion and are apparently not affected by the direction of DNA replication. In contrast, the mutagenic specificity of an AP site is not affected by the sequence context or the direction of replication. In all cases, dC is inserted at twice the frequency of dA opposite an AP site, indicating that REV1 is mainly responsible for bypass of AP sites at all lesion sites studied.
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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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