Previous analysis of the repression of the silent mating type loci in Saccharomyces cerevisiae has linked the mechanism of silencing to the formation of a chromatin domain at the silenced loci. In this study, a TRP1 reporter gene was used to examine changes in chromatin structure in a neutral environment. This enabled the chromatin structure organized by yeast silencers to be compared directly with changes effected by the yeast alpha2 repressor. It was found that silencers mediate the formation of lengthy nuclease-resistant domains on the DNA, rather than specifically positioning nucleosomes over promoter regions as the alpha2 repressor does. Silencing at the TRP1 reporter gene closely resembled silencing at the HMR and HML loci. Repression of the test gene was optimal when two silencers flanking the reporter gene were used, mimicking the situation at the silent loci. In addition, both repression of the reporter gene and the formation of nuclease-resistant chromatin domains was SIR4 dependent.
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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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