The 110 kDa spindle pole body component, Spc110p, is an essential target of calmodulin in budding yeast. Cells with mutations which reduce calmodulin binding to Spc110p are unable to form a mitotic spindle and die. Here we show that these effects can be overcome either directly by increasing extracellular calcium or calmodulin expression, which reverse the primary spindle defect, or indirectly through increased extracellular osmolarity or high dosage of MID2 or SLG1/HCS77/WSC1 which preserve viability. We propose that overcoming a cell integrity defect associated with the mitotic arrest enables the defective spindle pole bodies to provide sufficient function for proliferation of a large proportion of mutant cells. Our findings demonstrate a role for calcium in the Spc110p-calmodulin interaction in vivo and have important general implications for the interpretation of genetic interactions involving cell integrity genes.
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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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