The S-phase checkpoint is a surveillance mechanism, mediated by the protein kinases Mec1 and Rad53 in the budding yeast Saccharomyces cerevisiae (ATR and Chk2 in human cells, respectively) that responds to DNA damage and replication perturbations by co-ordinating a global cellular response necessary to maintain genome integrity. A key aspect of this response is the stabilization of DNA replication forks, which is critical for cell survival. A defective checkpoint causes irreversible replication-fork collapse and leads to genomic instability, a hallmark of cancer cells. Although the precise mechanisms by which Mec1/Rad53 maintain functional replication forks are currently unclear, our knowledge about this checkpoint function has significantly increased during the last years. Focusing mainly on the advances obtained in S. cerevisiae, the present review will summarize our understanding of how the S-phase checkpoint preserves the integrity of DNA replication forks and discuss the most recent findings on this topic.
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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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