The Saccharomyces cerevisiae general regulatory factor CP1, a helix-loop-helix protein that binds the centromere DNA element I (CDEI) of yeast centromeres, is required in yeast for optimal centromere function and for methionine prototrophy. Mutant alleles of CEP1, the gene encoding CP1, were generated by linker insertion, 5'- and 3'-deletion, and random mutagenesis and assayed for DNA binding activity and their ability to confer CP1 function when expressed in yeast. A heterologous CDEI-binding protein, TFEB, was also tested for CP1 function. The results suggested that DNA binding is required for both biological functions of CP1 but is not sufficient. A direct and quantitative correlation was observed between the chromosome loss and nutritional (i.e., Met) phenotypes of strains carrying loss of function alleles, but qualitatively the chromosome loss phenotype was more sensitive to decreased CP1 expression. The data are consistent with a model in which CP1 performs the same general chromatin-related function at centromeres and MET gene promoters and is normally present in functional excess.
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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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