Diagnosis and circumvention of multi-drug resistance requires an understanding of the underlying cellular mechanisms. In the model organism Saccharomyces cerevisiae, deletions of PDR5 or ERG6 increase sensitivity to many small lipophilic drugs. Pdr5p is a plasma membrane ATP-binding cassette transporter that actively exports drugs, thereby lowering their intracellular levels. The mechanism by which ERG6, an enzyme in sterol biosynthesis, affects drug accumulation is less clear. We show here that ERG6 limits the rate of passive drug diffusion across the membrane, without affecting Pdr5p-mediated drug export. Consistent with their action by distinct mechanisms, PDR5 and ERG6 effects on drug accumulation are additive.
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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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