Inactivation of the budding yeast telomere binding protein Cdc13 results in abnormal telomeres (exposed long G-strands) and activation of the DNA damage checkpoint. In the current study, we show that inactivation of Cdc13p induces apoptotic signals in yeast, as evidenced by caspase activation, increased reactive oxygen species production, and flipping of phosphatidylserine in the cytoplasmic membrane. These apoptotic signals were suppressed in a mitochondrial (rho(o)) mutant. Moreover, mitochondrial proteins (e.g. MTCO3) were identified as multicopy suppressors of cdc13-1, suggesting the involvement of mitochondrial functions in telomere-initiated apoptotic signaling. These telomere-initiated apoptotic signals were also shown to depend on MEC1, but not TEL1, and were antagonized by MRE11. Our results are consistent with a model in which single-stranded G-tails in the cdc13-1 mutant trigger MEC1-dependent apoptotic signaling in yeast.
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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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