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-Structure paper
タイトル | Structure of a membrane-bound menaquinol:organohalide oxidoreductase. |
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ジャーナル・号・ページ | Nat Commun, Vol. 14, Issue 1, Page 7038, Year 2023 |
掲載日 | 2023年11月3日 |
著者 | Lorenzo Cimmino / Américo G Duarte / Dongchun Ni / Babatunde E Ekundayo / Inês A C Pereira / Henning Stahlberg / Christof Holliger / Julien Maillard / |
PubMed 要旨 | Organohalide-respiring bacteria are key organisms for the bioremediation of soils and aquifers contaminated with halogenated organic compounds. The major players in this process are respiratory ...Organohalide-respiring bacteria are key organisms for the bioremediation of soils and aquifers contaminated with halogenated organic compounds. The major players in this process are respiratory reductive dehalogenases, corrinoid enzymes that use organohalides as substrates and contribute to energy conservation. Here, we present the structure of a menaquinol:organohalide oxidoreductase obtained by cryo-EM. The membrane-bound protein was isolated from Desulfitobacterium hafniense strain TCE1 as a PceAB complex catalysing the dechlorination of tetrachloroethene. Two catalytic PceA subunits are anchored to the membrane by two small integral membrane PceB subunits. The structure reveals two menaquinone molecules bound at the interface of the two different subunits, which are the starting point of a chain of redox cofactors for electron transfer to the active site. In this work, the structure elucidates how energy is conserved during organohalide respiration in menaquinone-dependent organohalide-respiring bacteria. |
リンク | Nat Commun / PubMed:37923808 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.83 Å |
構造データ | EMDB-18148, PDB-8q4h: |
化合物 | ChemComp-JYF: ChemComp-COB: ChemComp-SF4: ChemComp-MQ7: ChemComp-HOH: |
由来 |
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キーワード | ELECTRON TRANSPORT / RDH menaquinol:organohalide oxidoreductase |