EC 5.99.1.2 (DNA topoisomerase) inhibitor A topoisomerase inhibitor that inhibits the bacterial enzymes of the DNA topoisomerases, Type I class (EC 5.99.1.2) that catalyze ATP-independent breakage of one of the two strands of DNA, passage of the unbroken strand through the break, and rejoining of the broken strand. These bacterial enzymes reduce the topological stress in the DNA structure by relaxing negatively, but not positively, supercoiled DNA. CHEBI:50276 DNA topoisomerase inhibitor DNA topoisomerase inhibitors EC 5.99.1.2 (DNA topoisomerase) inhibitors EC 5.99.1.2 (topoisomerase I) inhibitor EC 5.99.1.2 (topoisomerase I) inhibitors EC 5.99.1.2 inhibitor EC 5.99.1.2 inhibitors chebi_ontology topoisomerase I (EC 5.99.1.2) inhibitor topoisomerase I (EC 5.99.1.2) inhibitors topoisomerase I inhibitor topoisomerase I inhibitors type I DNA topoisomerase inhibitor type I DNA topoisomerase inhibitors topoisomerase inhibitor