We have investigated DNA interactions between homologs and between sister chromatids during meiosis in S. cerevisiae. We have detected a DNA species containing information from both parental chromosomes at a specific hotspot for meiotic recombination and double strand breaks (DSBs). These joint molecules are a prominent feature of meiotic prophase. They appear to be a major intermediate stage in DSB-promoted recombination, because they occur with appropriate timing and require known recombination functions. Other possibilities cannot be completely dismissed, however. Most or all joint molecules contain two full-length nonrecombinant strands from each parental duplex and thus do not consist of single Holliday junctions. Joint molecules form between sister chromatids at approximately 10% the interhomolog level. Also, joint molecule formation is aberrant in a mutant defective in the HOP1 gene, which encodes a meiotic chromosome structure component. General models for discrimination between homologs and sisters during meiosis are discussed.
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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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