In response to replication stress, the Mec1/ATR and SUMO pathways control stalled- and damaged-fork stability. We investigated the S phase response at forks encountering a broken template (termed the terminal fork). We show that double-strand break (DSB) formation can locally trigger dormant origin firing. Irreversible fork resolution at the break does not impede progression of the other fork in the same replicon (termed the sister fork). The Mre11-Tel1/ATM response acts at terminal forks, preventing accumulation of cruciform DNA intermediates that tether sister chromatids and can undergo nucleolytic processing. We conclude that sister forks can be uncoupled during replication and that, after DSB-induced fork termination, replication is rescued by dormant origin firing or adjacent replicons. We have uncovered a Tel1/ATM- and Mre11-dependent response controlling terminal fork integrity. Our findings have implications for those genome instability syndromes that accumulate DNA breaks during S phase and for forks encountering eroding 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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