A method that facilitates gene replacement at the HIS3 locus of Saccharomyces cerevisiae (yeast) has been developed. First, an internal region of the cloned HIS3 gene was replaced by a DNA segment containing the wild-type ribosomal protein gene, CYH2. Second, by using standard yeast transformation methods, the wild-type HIS3 locus of a cycloheximide resistant strain (cyh2r) was replaced by this his3-CYH2 substitution. The resulting strain is sensitive to cycloheximide because CYH2 is dominant to cyh2r. Third, his3 mutations cloned into integrating or replicating vectors were introduced into this strain by selecting transformants via the vector-encoded marker. Selection for cycloheximide-resistant colonies resulted in the replacement of the his3-CYH2 allele by newly introduced his3 alleles. Thus, this scheme provides for the direct selection of gene replacement events at the HIS3 locus independently of the phenotype of the cloned his3 derivatives. In principle, it can be extended to any region of the yeast genome.
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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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