The fork protection complex (FPC), composed of Mrc1, Tof1, and Csm3, supports rapid and stable DNA replication. Here, we show that FPC activity also introduces DNA damage by increasing DNA topological stress during replication. Mrc1 action increases DNA topological stress during plasmid replication, while Mrc1 or Tof1 activity causes replication stress and DNA damage within topologically constrained regions. We show that the recruitment of Top1 to the fork by Tof1 suppresses the DNA damage generated in these loci. While FPC activity introduces some DNA damage due to increased topological stress, the FPC is also necessary to prevent DNA damage in long replicons across the genome, indicating that the FPC is required for complete and faithful genome duplication. We conclude that FPC regulation must balance ensuring full genome duplication through rapid replication with minimizing the consequential DNA topological stress-induced DNA damage caused by rapid replication through constrained regions.
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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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