Antibiotic export by MexB multidrug efflux transporter is allosterically controlled by a MexA-OprM chaperone-like complex.
Antibiotic export by MexB multidrug efflux transporter is allosterically controlled by a MexA-OprM chaperone-like complex.
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MexB多药外排转运体的抗生素输出受MexA-OprM类伴侣复合体的变构控制。
DOI:
10.1038/s41467-020-18770-5
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发表时间:
2020-10-02
影响因子:
16.6
通讯作者:
Lambert O
中科院分区:
文献类型:
--
作者:
Glavier M;Puvanendran D;Salvador D;Decossas M;Phan G;Garnier C;Frezza E;Cece Q;Schoehn G;Picard M;Taveau JC;Daury L;Broutin I;Lambert O
The tripartite multidrug efflux system MexAB-OprM is a major actor in Pseudomonas aeruginosa antibiotic resistance by exporting a large variety of antimicrobial compounds. Crystal structures of MexB and of its Escherichia coli homolog AcrB had revealed asymmetric trimers depicting a directional drug pathway by a conformational interconversion (from Loose and Tight binding pockets to Open gate (LTO) for drug exit). It remains unclear how MexB acquires its LTO form. Here by performing functional and cryo-EM structural investigations of MexB at various stages of the assembly process, we unveil that MexB inserted in lipid membrane is not set for active transport because it displays an inactive LTC form with a Closed exit gate. In the tripartite complex, OprM and MexA form a corset-like platform that converts MexB into the active form. Our findings shed new light on the resistance nodulation cell division (RND) cognate partners which act as allosteric factors eliciting the functional drug extrusion. The tripartite multidrug efflux system MexAB-OprM is a major actor in Pseudomonas aeruginosa antibiotic resistance by exporting a large variety of antimicrobial compounds. Here authors present cryo-EM structures of MexB at various stages of the assembly process and provide evidence that MexB activation is mediated by OprM and MexA.
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影响因子:
48
作者:
Li, Xueming;Mooney, Paul;Zheng, Shawn;Booth, Christopher R.;Braunfeld, Michael B.;Gubbens, Sander;Agard, David A.;Cheng, Yifan
通讯作者:
Cheng, Yifan
影响因子:
7.7
作者:
Matsunaga Y;Yamane T;Terada T;Moritsugu K;Fujisaki H;Murakami S;Ikeguchi M;Kidera A
通讯作者:
Kidera A
影响因子:
3.7
作者:
Bolla JR;Su CC;Do SV;Radhakrishnan A;Kumar N;Long F;Chou TH;Delmar JA;Lei HT;Rajashankar KR;Shafer WM;Yu EW
通讯作者:
Yu EW
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
14.9
作者:
Davis IW;Leaver-Fay A;Chen VB;Block JN;Kapral GJ;Wang X;Murray LW;Arendall WB 3rd;Snoeyink J;Richardson JS;Richardson DC
通讯作者:
Richardson DC