The highly conserved origin recognition complex (ORC) is required for repressing genes in the silent mating type loci of budding yeast. Here we report that at a non-permissive temperature, the temperature-sensitive orc2-1 mutation induces the expression of more than 500 genes, the majority of which are also induced during starvation of wild-type cells. Many genes induced by starvation or by the orc2-1 mutation are also induced by inactivation of proteins required for chromatin-mediated repression of transcription. Genes induced by the orc2-1 mutation, starvation, or inactivation of repressor proteins, map near ORC-binding loci significantly more frequently compared to all genes. Genes repressed by starvation map near ORC-binding sites less frequently compared to all genes, which suggests they have been evolutionarily excluded from regions of repressive chromatin near ORC-binding sites. Deletion of sequences containing ORC-binding sites near the DAL2 and DAL4 genes in the DAL gene cluster, which are induced by either the orc2-1 mutation or by starvation, constitutively activates these genes and abolishes their activation by the orc2-1 mutation. Our findings suggest a role for ORC in the repression of a large number of budding yeast genes induced by starvation or other aspects of a deleterious environment.
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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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