The stability of DNA ends generated by the HO endonuclease in yeast is surprisingly high with a half-life of more than an hour. This transient stability is unaffected by mutations that abolish nonhomologous end joining (NHEJ). The unprocessed ends interact with Yku70p and Yku80p, two proteins required for NHEJ, but not significantly with Rad52p, a protein involved in homologous recombination (HR). Repair of a double-strand break by NHEJ is unaffected by the possibility of HR, although the use of HR is increased in NHEJ-defective cells. Partial in vitro 5' strand processing suppresses NHEJ but not HR. These results show that NHEJ precedes HR temporally, and that the availability of substrate dictates the particular pathway used. We propose that transient stability of DNA ends is a foundation for the permanent stability of telomeres.
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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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| Evidence ID | Analyze ID | File | Description |
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