The bifunctional furocoumarin 8-methoxypsoralen (8-MOP) is a well established drug in the photochemotherapy of psoriasis and other skin diseases. In eukaryotic cells, this compound intercalates into DNA and undergoes photocycloaddition with pyrimidines to form monoadducts and interstrand crosslinks initiating a cascade of events leading to cytotoxic, mutagenic and carcinogenic responses. In yeast cells, exposure to 8-MOP plus UVA induces transcription of a large set of genes, and cellular reaction is different from an overall DNA damage response and specific to 8-MOP/UVA [M. Dardalhon, W. Lin, A. Nicolas, D. Averbeck, Specific transcriptional responses induced by 8-methoxypsoralen and UVA in yeast, FEMS Yeast Res. 7 (2007) 866-878]. To further define the relationship between induced genes and genotoxic consequences after 8-MOP/UVA treatment, the survival responses of mutants deleted for genes that are specifically induced by 8-MOP plus UVA were analysed in terms of survival. Six mutants deleted for RAD51, RAD54, DUN1, DIN7, already known to be implicated in DNA damage responses, and for SLT2/MPK1 and PDE2 involved in cell wall stress responses, were found sensitive to 8-MOP plus UVA treatment. Further characterization of slt2 mutant provides evidence for the existence of an 8-MOP/UVA response in yeast in which the yeast Slt2 MAPK pathway is implicated. Activation by 8-MOP plus UVA of this MAP kinase previously observed at the transcriptional level is now confirmed at the protein level. In addition to sensitivity to 8-MOP/UVA, yeast cells lacking SLT2 show reduced survival after 3-carbethoxypsoralen plus UVA and 1,6-dioxapyrene plus UVA. Osmotic support could suppress the sensitivities to these genotoxic agents, suggesting that these sensitivities are related to cell integrity defects and/or cell wall defects.
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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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