The structural genes for gluconeogenesis in the yeast Saccharomyces cerevisiae are activated by the carbon source-responsive element (CSRE) found in the respective upstream regions. Regulatory genes CAT8 and SIP4 both encode zinc-cluster proteins which can bind to CSRE motifs and activate target genes under conditions of glucose deprivation. In this work, we describe a functional analysis of sequence variants containing single mutations within the strongly activating CSRE(ICL1) motif. While the sequence CCNNNNNNCCG was required as the minimal UAS for gene activation by both Cat8 and Sip4, the activators responded differently to sequence variations in the central part of the CSRE. Our results allowed us to derive a consensus sequence for efficient gene activation by Cat8 (YCCNYTNRKCCG), while a more specific motif is required for activation by Sip4 (TCCATTSRTCCGR). Although their zinc cluster domains are clearly related, Cat8 and Sip4 are not isofunctional. This conclusion is further supported by the finding that biosynthetic derepression of Cat8 in the presence of a nonfermentable carbon source precedes that of Sip4 by about 90 min.
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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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