Regulation of the CYC7 gene of Saccharomyces cerevisiae, encoding iso-2-cytochrome c, was studied. Expression was induced about 20-fold by heme and derepressed 4- to 8-fold by a shift from glucose medium to one containing a nonfermentable carbon source. Deletion analysis showed that induction by heme depends upon sequences between -250 and -228 (from the coding sequence) and upon the HAP1 activator gene, previously shown to be required for CYC1 expression (L. Guarente et al., Cell 36:503-511, 1984). Thus, HAP1 coordinates expression of CYC7 and CYC1, the two genes encoding isologs of cytochrome c in S. cerevisiae. HAP1-18, a mutant allele of HAP1, which increased CYC7 expression more than 10-fold, also acted through sequences between -250 and -228. In vitro binding studies showed that the HAP1 product binds to these sequences (see also K. Pfeifer, T. Prezant, and L. Guarente, Cell 49:19-28, 1987) and an additional factor binds to distal sequences that lie between -201 and -165. This latter site augmented CYC7 expression in vivo. Derepression of CYC7 expression in a medium containing nonfermentable carbon sources depended upon sequences between -354 and -295. The interplay of these multiple sites and the factors that bind to them are discussed.
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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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