MRX, an evolutionally conserved DNA damage response complex composed of Mre11, Rad50 and Xrs2, is involved in DNA double strand break (DSB) repair, checkpoint activation and telomere maintenance. At DSBs, MRX plays a role in generating single stranded DNA (ssDNA) and signalling cell cycle arrest. Here we investigated whether MRX also contributes to generating ssDNA or signalling cell cycle arrest at uncapped telomeres. To investigate the role of MRX, we generated a conditionally degradable Rad50 protein and combined this with cdc13-1, a temperature sensitive mutation in the Cdc13 telomere capping protein. We show that Rad50 does not contribute to ssDNA generation or cell cycle arrest in response to cdcl3-1 uncapped telomeres. Instead, we find that Rad50 inhibits ssDNA accumulation and promotes cdc13-1 cell viability, consistent with a major role for MRX in telomere capping.
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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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