Purified Rad3 protein from the yeast Saccharomyces cerevisiae is a single-stranded DNA-dependent ATPase and also acts as a DNA helicase on partially duplex DNA. In this study we show that the DNA helicase activity is inhibited when a partially duplex circular DNA substrate is exposed to ultraviolet (UV) radiation. Inhibition of DNA helicase activity is sensitive to the particular strand of the duplex region which carries the damage. Inhibition is retained if the single-stranded circle is irradiated prior to annealing to an unirradiated oligonucleotide, but not if a UV-irradiated oligonucleotide is annealed to unirradiated circular single-stranded DNA. UV irradiation of single-stranded DNA or deoxyribonucleotide homopolymers also inhibits the ability of these polynucleotides to support the hydrolysis of ATP by Rad3 protein. UV radiation damage apparently blocks translocation of Rad3 protein and results in the formation of stable Rad3 protein-UV-irradiated DNA complexes. As a consequence, Rad3 protein remains sequestered on DNA, presumably at sites of base damage. The sensitivity of Rad3 protein to the presence of DNA damage on the strand along which it translocates provides a potential mechanism for damage recognition during nucleotide excision repair and may explain the absolute requirement for Rad3 protein for damage-specific incision of DNA in yeast.
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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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