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-Structure paper
タイトル | A 2.2 Å cryoEM structure of a quinol-dependent NO Reductase shows close similarity to respiratory oxidases. |
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ジャーナル・号・ページ | Nat Commun, Vol. 14, Issue 1, Page 3416, Year 2023 |
掲載日 | 2023年6月9日 |
著者 | Alex J Flynn / Svetlana V Antonyuk / Robert R Eady / Stephen P Muench / S Samar Hasnain / |
PubMed 要旨 | Quinol-dependent nitric oxide reductases (qNORs) are considered members of the respiratory heme-copper oxidase superfamily, are unique to bacteria, and are commonly found in pathogenic bacteria where ...Quinol-dependent nitric oxide reductases (qNORs) are considered members of the respiratory heme-copper oxidase superfamily, are unique to bacteria, and are commonly found in pathogenic bacteria where they play a role in combating the host immune response. qNORs are also essential enzymes in the denitrification pathway, catalysing the reduction of nitric oxide to nitrous oxide. Here, we determine a 2.2 Å cryoEM structure of qNOR from Alcaligenes xylosoxidans, an opportunistic pathogen and a denitrifying bacterium of importance in the nitrogen cycle. This high-resolution structure provides insight into electron, substrate, and proton pathways, and provides evidence that the quinol binding site not only contains the conserved His and Asp residues but also possesses a critical Arg (Arg720) observed in cytochrome bo, a respiratory quinol oxidase. |
リンク | Nat Commun / PubMed:37296134 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.2 Å |
構造データ | EMDB-16041, PDB-8bgw: |
化合物 | ChemComp-HEM: ChemComp-FE: ChemComp-CA: ChemComp-10M: ChemComp-UQ1: ChemComp-LOP: ChemComp-HOH: |
由来 |
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キーワード | MEMBRANE PROTEIN / quinol-dependent Nitric Oxide Reductase / proton transfer / quinol binding / ubiquinol oxidase |