A mutation at the RED1 locus was identified in a search for sporulation-proficient, meiotic-lethal yeast mutants. The few viable spores produced in the red1-1 mutant are highly aneuploid, suggesting that the spore lethality results from a high frequency of chromosome nondisjunction. Disomic spores produced by the red1-1 mutant contain nonsister chromatids and the red1-1 spore inviability phenotype is alleviated in red1-1 spo13 double mutants; these results indicate that nondisjunction occurs at the first meiotic division. The red1-1 mutant is recombination-proficient. The RED1 gene was cloned by complementation of the meiotic lethal phenotype; strains carrying a disruption of the gene are mitotically viable. We propose that the RED1 gene product is involved in meiosis I chromosome disjunction, perhaps by maintaining the connections between homologous chromosomes through metaphase I.
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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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