In an attempt to identify genes that can confer resistance to cisplatin, we introduced a yeast genomic library into Saccharomyces cerevisiae and selected for transformants that grew in the presence of a normally toxic concentration of cisplatin. Plasmids were rescued from the transformants and were analyzed for the presence of individual open reading frames that conferred resistance to cisplatin. We isolated two genes, CIN5 and YDR259c, that increased resistance to cisplatin when overexpressed in Saccharomyces cerevisiae. These genes encoded two proteins, Cin5 and Ydr259c, that were homologous to yAP-1, a basic leucine zipper transcriptional factor that is known to mediate cellular resistance to various toxic agents. The two proteins exhibited stronger homology to each other (33.2% identity, 49.2% similarity) than to all other gene products in S. cerevisiae. Overexpression of each of these proteins also conferred resistance to two DNA-alkylating agents, methylmethanesulfonate and mitomycin C. An experiment with fusion proteins with green fluorescent protein revealed that Cin5 and Ydr259c were localized constitutively in the nuclei of yeast cells. Our results suggest that Cin5 and Ydr259c might be involved in pleiotropic drug-resistance and might protect yeast against the toxicity of cisplatin and other alkylating agents via a single mechanism. These two nuclear proteins might act as transcriptional factors, regulating the expression of certain genes that confer resistance to DNA-alkylating agents.
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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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