The mek1 (meiotic kinase) mutant of Saccharomyces cerevisiae was isolated in a screen for sporulation-proficient, meiotic-lethal mutants. Diploids homozygous for a mek1 null mutation produce only 13% viable spores. mek1 spore inviability is rescued by a spo13 mutation, which causes cells to bypass the meiosis I division. In a mek1 null mutant, meiotic recombination is reduced but not completely eliminated. Nuclear spreads of meiotic chromosomes from mek1 diploids reveal numerous stretches of synaptonemal complex (SC) that are shorter than wild-type SCs. Analysis of a mek1::lacZ fusion gene and Northern blot hybridization demonstrate that the MEK1 transcript is present only in meiosis. The sequence of the MEK1 gene predicts a 56.8-kD protein with homology to serine-threonine protein kinases. The MEK1 gene maps to chromosome XV, 13 cM proximal to CDC64. Models for the function of the MEK1 gene product are proposed.
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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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