The reaction catalyzed by topoisomerases leads to the conversion of one topological isomer of DNA to another. Regulates the alternative splicing of tissue factor (F3) pre-mRNA in endothelial cells.
Specificity
Natural and recombinant Rat DNA topoisomerase 1
Subcellular Location
Nucleus nucleolus Nucleus nucleoplasm Diffuse nuclear localization with some enrichment in nucleoli. On CPT treatment, cleared from nucleoli into nucleoplasm. Sumolyated forms found in both nucleoplasm and nucleoli.
"Sequencing of rat topoisomerase I between sensitive and camptothecin-resistant C6 glioblastoma cell lines." Pourquier P., Gioffre C., Ueng L.-M., Robert J., Pommier Y. Submitted (1999-04) to the EMBL/GenBank/DDBJ databases
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