We describe positive/negative selectable cytosine deaminase MX cassettes for use in Saccharomyces cerevisiae. The basis of positive selection for cytosine deaminase (Fcy1) activity is that (a) fcy1 strains are unable to grow on medium containing cytosine as a sole nitrogen source and (b) fcy1 ura3 strains are unable to grow on medium containing cytosine as the sole pyrimidine source. Conversely, as 5-fluorocytosine (5FC) is toxic to cytosine deaminase-producing cells, fcy1 strains are resistant to 5FC. FCY1MX and FCA1MX cassettes, containing open reading frames (ORFs) of S. cerevisiae FCY1 and Candida albicans FCA1, respectively, were constructed and used to disrupt targeted genes in S. cerevisiae fcy1 strains. In addition, new direct repeat cassettes, kanPR, FCA1PR, FCY1PR and CaURA3PR, were developed to allow efficient deletion of target genes in cells containing MX3 repeats. Finally, the FCY1- and FCA1MX3 or PR direct repeat cassettes can be readily recycled after 5FC counter-selection on both synthetic and rich media.
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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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