In response to a DNA double-strand break (DSB), chromatin is rapidly modified by the damage dependent checkpoint kinases. Also, disassembly of chromatin occurs at the break site. The damage-induced modification of chromatin structure is involved in the maintenance of the checkpoint. However, it has not been determined how chromatin is restored to its undamaged state when DSB repair is complete. Here, we show the involvement of two chromatin assembly factors (CAFs), Asf1 and CAF-1, in turning off the DNA damage checkpoint in budding yeast. DSB repair or formation of gamma-H2AX does not depend on either the CAF-1 protein, Cac1, or Asf1. Absence of these proteins does not impair the ability of cells to resume cell cycle progression in the presence of an unrepaired DSB (adaptation). However, recovery from cell cycle checkpoint arrest when the DSB is repaired by gene conversion is substantially defective in the absence of both CAF-1 and Asf1, whereas deleting CAC1 or ASF1 individually had little effect. We suggest that CAF-1 and Asf1 function redundantly to deactivate the checkpoint by restoring chromatin structure on the completion of DSB repair.
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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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