Mrc1 associates with replication forks, where it transmits replication stress signals and is required for normal replisome pausing in response to nucleotide depletion. Mrc1 also plays a poorly understood role in DNA replication, which appears distinct from its role in checkpoint signaling. Here, we demonstrate that Mrc1 functions constitutively to promote normal replication fork progression. In mrc1Delta cells, replication forks proceed slowly throughout chromatin, rather than being specifically defective in pausing and progression through loci that impede fork progression. Analysis of genetic interactions with Rrm3, a DNA helicase required to resolve paused forks, indicates that Mrc1 checkpoint signaling is dispensable for the resolution of stalled replication forks and suggests that replication forks lacking Mrc1 create DNA damage that must be repaired by Rrm3. These findings elucidate a central role for Mrc1 in normal replisome function, which is distinct from its role as a checkpoint mediator, but nevertheless critical to genome stability.
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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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