The DNA damage checkpoint (DDC) is often robustly activated during the homologous recombination (HR) repair of DNA double strand breaks (DSBs). DDC activation controls several HR repair factors by phosphorylation, preventing premature segregation of entangled chromosomes formed during HR repair. The DDC mediator 53BP1/Rad9 limits the nucleolytic processing (resection) of a DSB, controlling the formation of the 3' single-stranded DNA (ssDNA) filament needed for recombination, from yeast to human. Here we show that Rad9 promotes stable annealing between the recombinogenic filament and the donor template in yeast, limiting strand rejection by the Sgs1 and Mph1 helicases. This regulation allows repair by long tract gene conversion, crossover recombination and break-induced replication (BIR), only after DDC activation. These findings shed light on how cells couple DDC with the choice and effectiveness of HR sub-pathways, with implications for genome instability and cancer.
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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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