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1
Amino Acid Substitutions Account for Most MexS Alterations in Clinical nfxC Mutants of Pseudomonas aeruginosa.氨基酸替换是铜绿假单胞菌临床 nfxC 突变体中大多数 MexS 改变的原因。
Antimicrob Agents Chemother. 2016 Mar 25;60(4):2302-10. doi: 10.1128/AAC.02622-15. Print 2016 Apr.
2
The challenge of efflux-mediated antibiotic resistance in Gram-negative bacteria.革兰氏阴性菌中由外排介导的抗生素耐药性挑战。
Clin Microbiol Rev. 2015 Apr;28(2):337-418. doi: 10.1128/CMR.00117-14.
3
Diversity of β-lactam resistance mechanisms in cystic fibrosis isolates of Pseudomonas aeruginosa: a French multicentre study.铜绿假单胞菌囊性纤维化分离株中β-内酰胺类耐药机制的多样性:法国多中心研究。
J Antimicrob Chemother. 2013 Aug;68(8):1763-71. doi: 10.1093/jac/dkt115. Epub 2013 Apr 29.
4
Genetic markers of widespread extensively drug-resistant Pseudomonas aeruginosa high-risk clones.广泛泛耐药铜绿假单胞菌高危克隆的遗传标记。
Antimicrob Agents Chemother. 2012 Dec;56(12):6349-57. doi: 10.1128/AAC.01388-12. Epub 2012 Oct 8.
5
The bacterial two-hybrid system based on adenylate cyclase reconstitution in Escherichia coli.基于大肠杆菌中腺苷酸环化酶重组的细菌双杂交系统。
Methods. 2012 Dec;58(4):325-34. doi: 10.1016/j.ymeth.2012.07.018. Epub 2012 Jul 24.
6
MexT functions as a redox-responsive regulator modulating disulfide stress resistance in Pseudomonas aeruginosa.MexT 作为一种氧化还原响应调节剂,调节铜绿假单胞菌中的二硫键应激抗性。
J Bacteriol. 2012 Jul;194(13):3502-11. doi: 10.1128/JB.06632-11. Epub 2012 Apr 27.
7
Role of the MexEF-OprN efflux system in low-level resistance of Pseudomonas aeruginosa to ciprofloxacin.MexEF-OprN 外排系统在铜绿假单胞菌低水平耐环丙沙星中的作用。
Antimicrob Agents Chemother. 2011 Dec;55(12):5676-84. doi: 10.1128/AAC.00101-11. Epub 2011 Sep 12.
8
Crystal structures of DntR inducer binding domains in complex with salicylate offer insights into the activation of LysR-type transcriptional regulators.DntR 诱导物结合结构域与水杨酸复合物的晶体结构为激活 LysR 型转录调控因子提供了线索。
Mol Microbiol. 2011 Jul;81(2):354-67. doi: 10.1111/j.1365-2958.2011.07673.x. Epub 2011 Jun 22.
9
Transcriptome profiling defines a novel regulon modulated by the LysR-type transcriptional regulator MexT in Pseudomonas aeruginosa.转录组谱分析定义了由铜绿假单胞菌 LysR 型转录调节因子 MexT 调节的新型调控子。
Nucleic Acids Res. 2009 Dec;37(22):7546-59. doi: 10.1093/nar/gkp828.
10
Inducer responses of BenM, a LysR-type transcriptional regulator from Acinetobacter baylyi ADP1.拜氏不动杆菌ADP1中LysR型转录调节因子BenM的诱导物反应
Mol Microbiol. 2009 May;72(4):881-94. doi: 10.1111/j.1365-2958.2009.06686.x. Epub 2009 Apr 8.

氨基酸取代导致 MexT 组成性激活,进而导致铜绿假单胞菌临床分离株 MexEF-OprN 过度表达。

Constitutive Activation of MexT by Amino Acid Substitutions Results in MexEF-OprN Overproduction in Clinical Isolates of Pseudomonas aeruginosa.

机构信息

UMR CNRS 6249 Chrono-Environnement, Laboratoire de Bactériologie, Université de Bourgogne Franche-Comté, Besançon, France.

Research and Development Department, Smaltis SAS, Besançon, France.

出版信息

Antimicrob Agents Chemother. 2018 Apr 26;62(5). doi: 10.1128/AAC.02445-17. Print 2018 May.

DOI:10.1128/AAC.02445-17
PMID:29530852
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5923100/
Abstract

When overproduced, the multidrug efflux system MexEF-OprN increases the resistance of to fluoroquinolones, chloramphenicol, and trimethoprim. In this work, we demonstrate that gain-of-function mutations in the regulatory gene result in oligomerization of the LysR regulator MexT, constitutive upregulation of the efflux pump, and increased resistance in clinical isolates.

摘要

当过度产生时,多药外排系统 MexEF-OprN 会增加 对氟喹诺酮类、氯霉素和甲氧苄啶的耐药性。在这项工作中,我们证明了调节基因 中的功能获得性突变导致 LysR 调节子 MexT 的寡聚化,外排泵的组成性上调,以及临床分离株的耐药性增加。