The 2-micron plasmid of the yeast Saccharomyces cerevisiae encodes a site-specific recombinase (FLP) that promotes inversion across a unique site contained in each of the 599-base-pair inverted repeats of the plasmid. We have studied the topological changes generated in supercoiled substrates after exposure to the purified FLP protein in vitro. When a supercoiled substrate bearing two FLP target sequences in inverse orientation is treated with FLP, the products are multiply knotted structures that arise as a result of random entrapment of interdomainal supercoils. Likewise, a supercoiled substrate bearing two target sequences in direct orientation yields multiply interlocked catenanes as the product. Both types of substrate seem to be able to undergo repeated rounds of recombination that result in products of further complexity. The FLP protein also acts as a site-specific topoisomerase during the recombination reaction.
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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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