A fraction of UVA-induced 8-methoxypsoralen (8-MOP) mono-adducts can be transformed by a second UVA (365 nm) irradiation procedure into lethal cross-links in Saccharomyces cerevisiae. To follow the fate of cross-linkable mono-adducts, cells were incubated in complete medium between the two UVA doses and survival was measured. The killing effect of the second UVA dose decreases rapidly in haploid wild-type as well as in strains blocked in mutagenic (RAD6+ type) or in recombinogenic (RAD52+ type) repair pathways. This is also true in the pso1-1 and pso2-1 strains selected for sensitivity to 8-MOP plus UVA treatment. In contrast, persistence of mono-adducts is observed in strains blocked in the excision-resynthesis repair pathway. In other words, cross-linkable mono-adducts are repaired by the excision process. The use of the cell-cycle conditional mutant strain (cdc14-1) permitted us to apply the second dose at a specific cell-cycle stage (post-G2 phase) after a 'priming' UVA treatment on stationary (G1) phase cells. Such experiments showed a bypass of mono-adducts in an excision-deficient context for at least one round of DNA replication.
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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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