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-Structure paper
| タイトル | 2-oxoglutarate:acceptor oxidoreductase-catalyzed redox cycling effectively targets coccoid forms of Helicobacter pylori. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 6965, Year 2025 |
| 掲載日 | 2025年7月29日 |
著者 | Xudong Hang / Weiqi Lan / Huang Yanqiang / Hongming Huang / Mingjing Zhang / Liping Zeng / Ting Shi / Yuefan Bai / Zhiyu Yang / Shanwei Hu / Junfan Wang / Linlin Dong / Qian Tong / Jia Jia / Shuzhuang Bi / Qianfeng Xia / Yan Gao / Hongkai Bi / ![]() |
| PubMed 要旨 | Helicobacter pylori, a globally significant pathogen, plays a central etiological role in diverse gastric pathologies ranging from chronic gastritis and peptic ulcers to gastric adenocarcinoma. ...Helicobacter pylori, a globally significant pathogen, plays a central etiological role in diverse gastric pathologies ranging from chronic gastritis and peptic ulcers to gastric adenocarcinoma. Although conventional antibiotics effectively inhibit or kill growing helical H. pylori, metabolically dormant coccoid forms of H. pylori exhibit considerable tolerance, posing a persistent and clinically significant challenge. Here, we report napabucasin (2-acetylfuro-1,4-naphthoquinone) as a redox-cycling antibiotic with potent bactericidal activity against both drug-resistant helical and coccoid forms of H. pylori. Notably, napabucasin does not induce acquired resistance in vitro and demonstrates superior efficacy compared to standard triple therapy in murine infection models. Mechanistic studies reveal that napabucasin acts through 2-oxoglutarate:acceptor oxidoreductase (OOR)-catalyzed futile redox cycling, generating bactericidal levels of reactive oxygen species (ROS). Compared to menaquinone 6, a proposed physiological electron acceptor, napabucasin exhibits enhanced oxidative capacity. Structural, biochemical, and microbiological analyses identify Leu44 and Lys46 within the OorD subunit as critical residues for napabucasin recognition and catalysis. These findings establish OOR-mediated redox cycling as a robust antimicrobial strategy that sustains endogenous ROS production to combat refractory H. pylori infections. |
リンク | Nat Commun / PubMed:40730563 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.95 - 3.03 Å |
| 構造データ | EMDB-39556, PDB-8ys5: EMDB-39557, PDB-8ys6: |
| 化合物 | ![]() ChemComp-SF4: ![]() ChemComp-MG: ![]() ChemComp-TPP: ![]() PDB-1d65: |
| 由来 |
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キーワード | OXIDOREDUCTASE / Oxoglutarate Oxidoreductase / Electron Transport / Tricarboxylic Acid Cycle / Napabucasin |
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