Uga3p, a member of zinc binuclear cluster transcription factor family, is required for gamma-aminobutyric acid-dependent transcription of the UGA genes in Saccharomyces cerevisiae. Members of this family bind to CGG triplets with the spacer region between the triplets being an important specificity determinant. A conserved 19-nucleotide activation element in certain UGA gene promoter regions contains a CCGN(4)CGG-everted repeat proposed to be the binding site of Uga3p, UAS(GABA). The function of conserved nucleotides flanking the everted repeat has not been rigorously investigated. The interaction of Uga3p with UAS(GABA) was characterized in terms of binding in vitro and transcriptional activation of lacZ reporter genes in vivo. Electromobility shift assays using mutant UAS(GABA) sequences and heterologously produced full-length Uga3p demonstrated that UAS(GABA) consists of two independent Uga3p binding sites. Simultaneous occupation of both Uga3p binding sites of UAS(GABA) with high affinity is essential for GABA-dependent transcriptional activation in vivo. We present evidence that the two Uga3p molecules bound to UAS(GABA) probably interact with each other and show that Uga3p((1-124)), previously used for binding studies, is not functionally equivalent to the full-length protein with respect to binding in vitro. We propose that the Uga3p binding site is an asymmetric site of 5'-SGCGGNWTTT-3' (S = G or C, W = A, or T and n = no nucleotide or G). However, UAS(GABA), is a palindrome containing two asymmetric Uga3p binding sites.
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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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