Gene targeting by homologous recombination occurs in Saccharomyces cerevisiae efficiently when there are as few as 30 base pairs of sequence homology at both ends of the targeting construct. Multiple gene disruptions within a single cell are possible using the hisG cassette, which allows recovery of the marker but leaves a single hisG sequence imbedded in the disrupted gene(s). We use an integration hisG construct, which has limited homology to the target at one end, to show that a single genomic copy of hisG decreases the percentage of integration at the target locus from 44% to 4.5% and two genomic hisG copies decrease it to less than 1%. Enlarging the homology at the disruption construct abolishes this effect. Thus competition between endogenous hisG sequences and successive hisG cassette transformations occurs if there is limited homology at one end of the targeting construct. Therefore, methods using limited homology, such as PCR-mediated gene targeting, are inefficient when significant internal homology exists.
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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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