ATM/ATR homologs are the central elements of genome surveillance mechanisms in many organisms, including yeasts, flies, and mammals. In Saccharomyces cerevisiae, most checkpoint responses depend on the ATR ortholog Mec1p. The yeast ATM ortholog, Tel1p, so far has been implicated in a specific DNA damage checkpoint during S-phase as well as in telomere homeostasis. In particular, yeast cells lacking only Tel1p harbor short but stable telomeres, while cells lacking both Tel1p and Mec1p are unable to maintain telomeric repeats and senesce. Here, we present the characterization of a new mutation in the TEL1-gene, called tel1-11, which was isolated by virtue of a synthetic lethal interaction at 37 degrees C with a previously described mec1-ts mutation. Interestingly, telomere and checkpoint functions are differentially affected by the mutant protein Tel1-11p. The Tel1p-dependent checkpoint response is undetectable in cells containing Tel1-11p and incubated at 37 degrees C, but basic telomere function is maintained. Further, when the same cells are incubated at 26 degrees C, Tel1-11p confers full proficiency for all telomere functions analyzed, whereas the function for DNA-damage checkpoint activation is clearly affected. The results thus strongly suggest that the different cellular pathways affected by Tel1p do not require the same level of Tel1p activity to be fully functional.
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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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