Cryo-EM map of Mycobacterium smegmatis bd complex pre-incubated with aurachin D(AD)
マップデータ
試料
複合体: Cryo-EM structure of Mycobacterium smegmatis bd complex
機能・相同性
機能・相同性情報
酸化還元酵素; ジフェノール類縁体を供与体とする; 酸素が電子受容体 / cytochrome complex / alkaline phosphatase / alkaline phosphatase activity / aerobic electron transport chain / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / electron transfer activity / heme binding / metal ion binding / plasma membrane 類似検索 - 分子機能
National Natural Science Foundation of China (NSFC)
81520108019, 813300237
中国
Chinese Academy of Sciences
2017YFC0840300
中国
引用
ジャーナル: Nat Commun / 年: 2021 タイトル: Cryo-EM structure of mycobacterial cytochrome bd reveals two oxygen access channels. 著者: Weiwei Wang / Yan Gao / Yanting Tang / Xiaoting Zhou / Yuezheng Lai / Shan Zhou / Yuying Zhang / Xiuna Yang / Fengjiang Liu / Luke W Guddat / Quan Wang / Zihe Rao / Hongri Gong / 要旨: Cytochromes bd are ubiquitous amongst prokaryotes including many human-pathogenic bacteria. Such complexes are targets for the development of antimicrobial drugs. However, an understanding of the ...Cytochromes bd are ubiquitous amongst prokaryotes including many human-pathogenic bacteria. Such complexes are targets for the development of antimicrobial drugs. However, an understanding of the relationship between the structure and functional mechanisms of these oxidases is incomplete. Here, we have determined the 2.8 Å structure of Mycobacterium smegmatis cytochrome bd by single-particle cryo-electron microscopy. This bd oxidase consists of two subunits CydA and CydB, that adopt a pseudo two-fold symmetrical arrangement. The structural topology of its Q-loop domain, whose function is to bind the substrate, quinol, is significantly different compared to the C-terminal region reported for cytochromes bd from Geobacillus thermodenitrificans (G. th) and Escherichia coli (E. coli). In addition, we have identified two potential oxygen access channels in the structure and shown that similar tunnels also exist in G. th and E. coli cytochromes bd. This study provides insights to develop a framework for the rational design of antituberculosis compounds that block the oxygen access channels of this oxidase.