Mutations at three loci in Saccharomyces cerevisiae have been shown to confer increased sensitivity to the antimalarial and antiarrhythmic alkaloid, quinidine. Two of these groups are composed of strains carrying recessive mutations, the other group contains two dominant alleles. The largest complementation group has been designated QDS1, for increased quinidine-sensitivity. Exposure of qds1 cells to lethal concentrations of quinidine results in a novel small-budded terminal morphology in about 70% of the cells in the culture. Strains which carry qds1 alleles share other pleiotropic phenotypes. qds1 mutants are incapable of mating as alpha but not a cells, due to a defect in alpha-factor production. Homozygous diploid qds1 strains cannot sporulate. Genetic evidence indicates that QDS1 is allelic to KEX2, a precursor processing protease. Loss of QDS1/KEX2 function results in quinidine sensitivity.
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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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