Elevations in gene dosage of the transcriptional regulatory protein yAP-1 in Saccharomyces cerevisiae can elicit pronounced phenotypic increases in tolerance of a variety of drugs including the toxic heavy metal cadmium. While a large elevation in cadmium tolerance occurs in response to overproduction of yAP-1, the target genes under yAP-1 control have not yet been identified that are responsible for this increase. We show here that the YCF1 gene, encoding a likely integral membrane protein, is required for yAP-1 to exert its normal effects on cadmium tolerance. Mutant strains of yeast that lack the YCF1 gene are hypersensitive to cadmium and this hypersensitivity is epistatic to yAP-1 overexpression. YCF1 mRNA levels and the expression of a YCF1-lacZ reporter construct positively correlates with changes in YAP1 gene dosage. A set of 5' truncation derivatives of the YCF1-lacZ fusion gene identified the region from -201 to +47 as being sufficient for the yAP-1-dependent increase in expression. DNase I footprinting using a probe from this segment of the YCF1 promoter showed that bacterially-produced yAP-1 protein was capable of binding a novel DNA element we have designated the yAP-1 response element. Insertion of the yAP-1 response element upstream of a CYC1-lacZ gene fusion led to the production of beta-galactosidase in a yAP-1-dependent fashion. These data establish that an important physiological target of yAP-1 transcriptional regulation is the YCF1 structural gene.
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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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