In S. cerevisiae, gamma-aminobutyrate (GABA) induces transcription of the UGA genes required for its utilization as a nitrogen source. Analysis of the 5' region of the UGA1 and UGA4 genes led to the identification of a conserved GC-rich sequence (UASGABA) essential to induction by gamma-aminobutyrate. Alone, this UASGABA element also supported some levels of reporter gene transcription in the presence of gamma-aminobutyrate. To be effective, UASGABA requires two positive-acting proteins that both contain a Cys6-Zn2 type zinc-finger motif, namely pathway-specific Uga3p and pleiotropic Uga35p(Dal81p/DurLp). Further analysis of the UGA4 gene revealed that Gln3p, a global nitrogen regulatory protein containing a GATA zinc-finger domain, is required in order to reach high levels of gamma-aminobutyrate-induced transcription. The Gln3p factor exerts its function mainly through a cluster of 5'-GAT(A/T)A-3'(UASGATA) situated just upstream from UASGABA. The role of Gln3p is less predominant in UGA1 than in UGA4 gene expression. We propose that tight coupling between the UASGABA and UASGATA elements enables the cell to integrate, according to its nitrogen status, the induced expression levels of UGA4.
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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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