Structural basis for inhibition of the drug efflux pump NorA from Staphylococcus aureus.
Structural basis for inhibition of the drug efflux pump NorA from Staphylococcus aureus.
复制标题
抑制金黄色葡萄球菌药物外排泵NorA的结构基础。
DOI:
10.1038/s41589-022-00994-9
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发表时间:
2022-07
影响因子:
14.8
通讯作者:
Traaseth NJ
中科院分区:
文献类型:
--
作者:
Brawley DN;Sauer DB;Li J;Zheng X;Koide A;Jedhe GS;Suwatthee T;Song J;Liu Z;Arora PS;Koide S;Torres VJ;Wang DN;Traaseth NJ
Membrane protein efflux pumps confer antibiotic resistance by extruding structurally distinct compounds and lowering their intracellular concentration. Yet there are no clinically approved drugs to inhibit efflux pumps, which would potentiate the efficacy of existing antibiotics rendered ineffective by drug efflux. Here we identified synthetic antigen-binding fragments (Fabs) that inhibit the quinolone transporter NorA from methicillin-resistant Staphylococcus aureus (MRSA). Structures of two NorA-Fab complexes determined using cryo-electron microscopy reveal a Fab loop deeply inserted in the substrate binding pocket of NorA. An arginine residue on this loop interacts with two neighboring aspartate and glutamate residues essential for NorA-mediated antibiotic resistance in MRSA. Peptide mimics of the Fab loop inhibit NorA with sub-micromolar potency and ablate MRSA growth in combination with the antibiotic norfloxacin. These findings establish a class of peptide inhibitors that block antibiotic efflux in MRSA by targeting indispensable residues in NorA without the need for membrane permeability.
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影响因子:
16.8
作者:
Karpowich NK;Song JM;Cocco N;Wang DN
通讯作者:
Wang DN
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
4.9
作者:
DeMarco, Carmen E.;Cushing, Laurel A.;Kaatz, Glenn W.
通讯作者:
Kaatz, Glenn W.
影响因子:
6.4
作者:
Fey PD;Endres JL;Yajjala VK;Widhelm TJ;Boissy RJ;Bose JL;Bayles KW
通讯作者:
Bayles KW
影响因子:
16
作者:
Fluman N;Ryan CM;Whitelegge JP;Bibi E
通讯作者:
Bibi E