The expression of yeast genes encoding gluconeogenic enzymes depends strictly on the carbon source available in the growth medium. We have characterized the control region of the isocitrate lyase gene ICL1, which is derepressed more than 200-fold after transfer of cells from fermentative to nonfermentative growth conditions. Deletion analysis of the ICL1 promoter led to the identification of an upstream activating sequence element, UASICL1 (5' CATTCATCCG 3'), necessary and sufficient for conferring carbon source-dependent regulation on a heterologous reporter gene. Similar sequence motifs were also found in the upstream regions of coregulated genes involved in gluconeogenesis. This carbon source-responsive element (CSRE) interacts with a protein factor, designated Ang1 (activator of nonfermentative growth), detectable only in extracts derived from derepressed cells. Gene activation mediated by the CSRE requires the positively acting derepression genes CAT1 (= SNF1 and CCR1) and CAT3 (= SNF4). In the respective mutants, Ang1-CSRE interaction was no longer observed under repressing or derepressing conditions. Since binding of Ang1 factor to the CSRE could be competed for by an upstream sequence derived from the fructose-1,6-bisphosphatase gene FBP1, we propose that the CSRE functions as a UAS element common to genes of the gluconeogenic pathway.
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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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