The effect of endogenous and exogenous DNA damage on the cellular metabolism can be studied at the genetic and molecular level. A paradigmatic case is the repair of UV-induced pyrimidine dimers (PDs) by nucleotide excision repair (NER) in Saccharomyces cerevisiae. To follow the formation and repair of PDs at specific chromosome loci, cells are irradiated with UV-light and incubated in the dark to allow repair by NER. Upon DNA isolation, cyclobutane pyrimidine dimers, which account for about 90 % of PDs, can be cleaved in vitro by the DNA nicking activity of the T4 endonuclease V repair enzyme. Subsequently, strand-specific repair in a suitable restriction fragment is determined by denaturing gel electrophoresis followed by Southern blot and indirect end-labeling using a single-stranded DNA probe. Noteworthy, this protocol could potentially be adapted to other kind of DNA lesions, as long as a DNA nick is formed or a lesion-specific endonuclease is available.Transcription-coupled repair (TC-NER) is a sub-pathway of NER that catalyzes the repair of the transcribed strand of active genes. RNA polymerase II is essential for TC-NER, and its occupancy on a damaged template can be analyzed by chromatin immunoprecipitation (ChIP). In this chapter, we provide an up-dated protocol for both the DNA repair analysis and ChIP approaches to study TC-NER in yeast chromatin.
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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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