We have determined the complete nucleotide sequence of a 5.3-kb long genomic DNA fragment of the fission yeast Schizosaccharomyces pombe that encodes DNA topoisomerase II. It contains a 4293 bp long single open reading frame. The predicted polypeptide has 1431 residues (mol. wt 162,000) and shows three characteristic domains; the large C-terminal region, which consists of alternating acidic-basic stretches and might be a chromatin-binding domain, the NH2 half domain homologous to the ATP-binding gyrB subunit of bacterial gyrase and the central-to-latter part which is homologous to the NH2 domain of the catalytic gyrA subunit, suggesting a possible evolutionary consequence of the gene fusion of the bacterial gyrase subunits into the eucaryotic DNA topoisomerase II gene. We have found that the cloned fission yeast TOP2 gene can complement the budding yeast top2 mutation, although the fission yeast TOP2 protein sequence is only 50% homologous to the recently determined sequence of budding yeast (J.C. Wang, personal communication). Conversely, the budding yeast TOP2 gene can complement the fission yeast top2 mutations, indicating that their DNA topoisomerase II genes are functionally exchangeable.
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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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