To identify novel genes that confer resistance to methylmercury (MeHg), a yeast genomic DNA library was transfected into Saccharomyces cerevisiae. Two functional plasmids were isolated from transfected yeast clones D1 and H5 that exhibited resistance to MeHg. The yeast transfected with plasmid isolated from clone H5 was several-fold more resistant than yeast transfected with plasmid from clone D1. Functional characterization of the genomic DNA fragment obtained from clone H5 determined that the GFA1 gene conferred resistance to MeHg. GFA1 was reported to encode L-glutamine:D-fructose-6-phosphate amidotransferase (GFAT) which catalyzes the synthesis of glucosamine-6-phosphate from glutamine and fructose-6-phosphate. Accumulation of mercury in yeast clone W303B/pGFA1, which contains the transfected GFA1 gene, did not differ from that in control yeast clone W303B/pYES2. The W303B/pGFA1 strain did not show resistance to mercuric chloride, zinc chloride, cadmium chloride or copper chloride, suggesting that the resistance acquired by GFA1 gene transfection might be specific to MeHg. This is the first report of a gene involved in MeHg resistance in eukaryotic cells identified by screening a DNA library.
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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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