ArticleAntibiotics (Basel, Switzerland)2019
A RADAR-Based Assay to Isolate Covalent DNA Complexes in Bacteria.
Article in Antibiotics (Basel, Switzerland), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 8 citations in OpenAlex.
- TOP1 CAD-seq: A protocol to map catalytically engaged topoisomerase 1 in human cells.STAR protocols · 2022Article
- A RADAR method to measure DNA topoisomerase covalent complexes.Methods in enzymology · 2022Article
- Exonuclease VII repairs quinolone-induced damage by resolving DNA gyrase cleavage complexes.Science advances · 2021Article
- Rapid, direct detection of bacterial topoisomerase 1-DNA adducts by RADAR/ELISA.Analytical biochemistry · 2020Article
- Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
Quinolone antibacterials target the type II topoisomerases gyrase and topoisomerase IV and kill bacterial cells by converting these essential enzymes into cellular poisons. Although much is known regarding the interactions between these drugs and enzymes in purified systems, much less is known regarding their interactions in the cellular context due to the lack of a widely accessible assay that does not require expensive, specialized equipment. Thus, we developed an assay, based on the "rapid approach to DNA adduct recovery," or RADAR, assay that is used with cultured human cells, to measure cleavage complex levels induced by treating bacterial cultures with the quinolone ciprofloxacin. Many chemical and mechanical lysis conditions and DNA precipitation conditions were tested, and the method involving sonication in denaturing conditions followed by precipitation of DNA via addition of a half volume of ethanol provided the most consistent results. This assay can be used to complement results obtained with purified enzymes to expand our understanding of quinolone mechanism of action and to test the activity of newly developed topoisomerase-targeted compounds. In addition, the bacterial RADAR assay can be used in other contexts, as any proteins covalently complexed to DNA should be trapped on and isolated with the DNA, allowing them to then be quantified.
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Registered trials
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