Article (Scientific journals)
Exonuclease VII repairs quinolone-induced damage by resolving DNA gyrase cleavage complexes.
Huang, Shar-Yin N; Michaels, Stephanie A; Mitchell, Brianna B et al.
2021In Science Advances, 7 (10)
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Keywords :
Quinolones; DNA; EC 3.1.- (Exonucleases); EC 5.99.1.3 (DNA Gyrase); Bacteria/genetics; DNA Gyrase/genetics; Exonucleases; Quinolones/pharmacology
Abstract :
[en] The widely used quinolone antibiotics act by trapping prokaryotic type IIA topoisomerases, resulting in irreversible topoisomerase cleavage complexes (TOPcc). Whereas the excision repair pathways of TOPcc in eukaryotes have been extensively studied, it is not known whether equivalent repair pathways for prokaryotic TOPcc exist. By combining genetic, biochemical, and molecular biology approaches, we demonstrate that exonuclease VII (ExoVII) excises quinolone-induced trapped DNA gyrase, an essential prokaryotic type IIA topoisomerase. We show that ExoVII repairs trapped type IIA TOPcc and that ExoVII displays tyrosyl nuclease activity for the tyrosyl-DNA linkage on the 5'-DNA overhangs corresponding to trapped type IIA TOPcc. ExoVII-deficient bacteria fail to remove trapped DNA gyrase, consistent with their hypersensitivity to quinolones. We also identify an ExoVII inhibitor that synergizes with the antimicrobial activity of quinolones, including in quinolone-resistant bacterial strains, further demonstrating the functional importance of ExoVII for the repair of type IIA TOPcc.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Huang, Shar-Yin N ;  Laboratory of Molecular Pharmacology, Developmental Therapeutics Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA. shar-yin.huang@nih.gov pommier@nih.gov.
Michaels, Stephanie A;  Laboratory of Molecular Pharmacology, Developmental Therapeutics Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA.
Mitchell, Brianna B;  Laboratory of Molecular Pharmacology, Developmental Therapeutics Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA.
Majdalani, Nadim ;  Laboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA.
Vanden Broeck, Arnaud  ;  Integrated Structural Biology Department, IGBMC, UMR7104 CNRS, U1258 Inserm, University of Strasbourg, Illkirch 67404, France.
Canela, Andres ;  The Hakubi Center for Advanced Research, Radiation Biology Center, Graduate School of Biostudies, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan.
Tse-Dinh, Yuk-Ching ;  Department of Chemistry and Biochemistry, Biomolecular Sciences Institute, Florida International University, Miami, FL 33199, USA.
Lamour, Valerie ;  Integrated Structural Biology Department, IGBMC, UMR7104 CNRS, U1258 Inserm, University of Strasbourg, Illkirch 67404, France.
Pommier, Yves ;  Laboratory of Molecular Pharmacology, Developmental Therapeutics Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA. shar-yin.huang@nih.gov pommier@nih.gov.
Language :
English
Title :
Exonuclease VII repairs quinolone-induced damage by resolving DNA gyrase cleavage complexes.
Publication date :
March 2021
Journal title :
Science Advances
eISSN :
2375-2548
Publisher :
American Association for the Advancement of Science (AAAS), Washington, Us dc
Volume :
7
Issue :
10
Peer reviewed :
Peer Reviewed verified by ORBi
Funding number :
Z01 BC006150/ImNIH/Intramural NIH HHS/United States
Commentary :
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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since 03 October 2024

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