When cells are exposed to elevated temperatures, transcription of a small set of genes, the heat-shock genes, is activated. This response is mediated by a short DNA sequence, the heat-shock element (HSE), which is thought to be the binding site for a specific transcription factor. Studies with Drosophila show that this protein binds to HSEs only in heat-shocked cells, suggesting that changes in factor binding are responsible for gene activation. We have investigated the properties of HSE-binding proteins from yeast and HeLa cells. In HeLa cells, binding activity is present only after heat shock. In contrast, control and heat-shocked yeast cells yield the same amount of HSE-binding activity; however, the mobility of protein-HSE complexes on polyacrylamide gels is altered following heat shock. This mobility difference can be significantly reduced by treatment of crude extracts with phosphatase. We propose that the yeast heat-shock factor binds constitutively to DNA but only activates transcription after heat-induced phosphorylation.
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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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