Positive and negative regulation of the GAL1 promoter of the yeast Saccharomyces cerevisiae results from a network of interactions between transcription factors and chromatin. In this study we used footprinting procedures to characterize these interactions in vivo. DNase I analysis of the GAL1 upstream activating sequence (UAS(GAL1/10)) showed expected Gal4 activator protein binding during growth in galactose, and also revealed binding of the Reb1 protein (Reb1p) during growth in glucose. In addition, we mapped to nucleotide resolution a positioned nucleosome that, in the inactive promoter, packages DNA between the UAS(GAL1/10) and the GAL1 TATA sequence, leaving both of these elements nucleosome free. The nucleosome footprint was lost when the promoter was activated. Surprisingly, mutation of the Reb1p binding site had no effect on nucleosome positioning or on the kinetics or extent of activation or repression of either the GAL1 or GAL10 promoters under any of the conditions assayed.
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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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