In response to DNA replication stress in Saccharomyces cerevisiae, the DNA replication checkpoint maintains replication fork stability, prevents precocious chromosome segregation, and causes cells to arrest as large-budded cells. The checkpoint kinases Mec1 and Rad53 act in this checkpoint. Treatment of mec1 or rad53Delta mutants with replication inhibitors results in replication fork collapse and inappropriate partitioning of partially replicated chromosomes, leading to cell death. We describe a previously unappreciated function of various replication stress checkpoint proteins, including Rad53, in the control of cell morphology. Checkpoint mutants have aberrant cell morphology and cell walls, and show defective bud site selection. Rad53 shows genetic interactions with septin ring pathway components, and, along with other checkpoint proteins, controls the timely degradation of Swe1 during replication stress, thereby facilitating proper bud growth. Thus, checkpoint proteins play an important role in coordinating morphogenetic events with DNA replication during replication stress.
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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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