Expression of the FOX3 gene, which encodes yeast peroxisomal 3-oxoacyl-coenzyme A thiolase, can be induced by oleate and repressed by glucose. Previously, we have shown that induction was mediated by an oleate response element. Just upstream of this element a negatively acting control region that mediated glucose repression was found. In order to study this negative control region, we carried out DNA-binding assays and analyzed phenotypes of mutations in this region and in the trans-acting factor CAR80, which is identical to UME6. DNA-binding assays showed that two multifunctional yeast proteins, ABF1 and RP-A, interacted with the negative control element independently of the transcriptional activity of the FOX3 gene. ABF1 and RP-A, the latter being identical to BUF, were able to bind to DNA independently of one another but also simultaneously. The phenotypes of mutations in either DNA-binding sites of ABF1, RP-A, or both, which affected the DNA binding of these factors in vitro, indicated that these sites and the proteins that interact with them participate in glucose repression. The involvement of the RP-A site in glucose repression was further supported by our observation that the CAR80 gene product, which is required for repression mediated by the RP-A site, was essential for maintenance of glucose repression. In addition to the RP-A site in the FOX3 promoter, similar sequences were observed in other genes involved in peroxisomal function. RP-A proved to bind to all of these sequences, albeit with various affinities. From these results it is concluded that the ABF1 and RP-A sites are being required in concert to mediate glucose repression of the FOX3 gene. In addition, coordinated regulation of expression of genes involved in peroxisomal function in response to glucose is mediated by proteins associated with the RP-A site, probably RP-A and CAR80.
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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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