We have devised a genetic screen to identify trans-acting factors involved in chromosome transmission in yeast. This approach was designed to potentially identify a subset of genes encoding proteins that interact with centromere DNA. It has been shown that mutations in yeast centromere DNA cause aberrant chromosome segregation during mitosis and meiosis. We reasoned that the function of an altered centromere should be particularly sensitive to changes in factors with which it interacts. We constructed a disomic strain containing one copy of chromosome III with a wild-type centromere and one copy of chromosome III bearing the SUP11 gene and a mutant CEN3. This strain forms white colonies with red sectors due to nondisjunction of the chromosome bearing the mutant centromere. After mutagenesis we picked colonies that exhibited increased nondisjunction of the mutant chromosome as evidenced by increased red-white sectoring. Using this approach, we have isolated three trans-acting chromosome nondisjunction (cnd) mutants that are defective in maintaining chromosomes during mitosis in yeast.
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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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