A terbinafine-resistant mutant of the yeast Saccharomyces cerevisiae with a complex pleiotropic phenotype (resistance to terbinafine and itraconazole, sensitivity to several antifungal compounds, respiration deficiency, and temperature sensitivity) has been isolated after chemical mutagenesis. Detailed analysis revealed that some of its traits (thermosensitive growth, sensitivity to the polyene antimycotic nystatin and to calcofluor white) are linked to alterations in the cell wall. A single C1288G base change in the ERG1 gene resulting in the substitution of proline by alanine at position 430 in the enzyme squalene epoxidase (Erg1p) was identified as the sole cause of terbinafine resistance. This novel mutation in the ERG1 gene confers only partial resistance of Erg1p to terbinafine, however, even the low level of resistance enables terbinafine-treated mutant cells to maintain adequate ergosterol levels over longer cultivation periods. Lack of interference of squalene accumulation with growth of terbinafine-treated mutant cells indicates that the antimycotic effect of terbinafine in S. cerevisiae may be linked primarily to ergosterol depletion.
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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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