Mechanistic insight into how multidrug resistant Acinetobacter baumannii response regulator AdeR recognizes an intercistronic region.

Mechanistic insight into how multidrug resistant Acinetobacter baumannii response regulator AdeR recognizes an intercistronic region.
复制标题

多药耐药鲍曼不动杆菌反应调节因子 AdeR 如何识别顺反子间区域的机制洞察

DOI:
10.1093/nar/gkx624
复制
发表时间:
2017-09-19
影响因子:
14.9
通讯作者:
Zheng F
Zheng F
中科院分区:
生物学2区
文献类型:
--
作者:
Wen Y;Ouyang Z;Yu Y;Zhou X;Pei Y;Devreese B;Higgins PG;Zheng F

文献摘要

参考文献

被引文献

相似文献

AdeR-AdeS是一个双组分调节系统,其控制参与鲍曼不动杆菌多药耐药的adeABC外排泵的表达。AdeR是一种应答调节因子,由N端受体结构域和C端DNA结合结构域组成。AdeR与AdeR和AdeABC之间的顺反子间区域中的直接重复DNA结合。我们证明了非磷酸化的AdeR和DNA之间具有显着高的亲和力结合,解离常数为20 nM。此外,我们提供了一个2.75 μ m的晶体结构的AdeR DNA结合域与顺反子间的DNA复合物。这种结构表明,由β5-β6形成的α3和β发夹与DNA的大沟和小沟相互作用,从而导致引入弯曲。AdeR受体结构域结构揭示了由齿轮样结构介导的二聚化基序,该齿轮样结构涉及D108 F109-R122基序通过阳离子π堆叠相互作用。AdeR受体结构域与镁离子结合的结构表明存在一个保守的Glu 19 Asp 20-Asp 63镁离子结合基序,并揭示了潜在的磷酸化位点Asp 63 OD 1与Lys 112形成氢键。因此,我们剖析了AdeR如何识别顺反子间DNA的机制,这导致了不同的反应调节模式。解锁AdeRS机制提供了规避A的方法。鲍曼不动杆菌耐药性
AdeR–AdeS is a two-component regulatory system, which controls expression of the adeABC efflux pump involved in Acinetobacter baumannii multidrug resistance. AdeR is a response regulator consisting of an N-terminal receiver domain and a C-terminal DNA-binding-domain. AdeR binds to a direct-repeat DNA in the intercistronic region between adeR and adeABC. We demonstrate a markedly high affinity binding between unphosphorylated AdeR and DNA with a dissociation constant of 20 nM. In addition, we provide a 2.75 Å crystal structure of AdeR DNA-binding-domain complexed with the intercistronic DNA. This structure shows that the α3 and β hairpin formed by β5–β6 interacts with the major and minor groove of the DNA, which in turn leads to the introduction of a bend. The AdeR receiver domain structure revealed a dimerization motif mediated by a gearwheel-like structure involving the D108F109-R122 motif through cation π stack interaction. The structure of AdeR receiver domain bound with magnesium indicated a conserved Glu19Asp20-Asp63 magnesium-binding motif, and revealed that the potential phosphorylation site Asp63OD1 forms a hydrogen bond with Lys112. We thus dissected the mechanism of how AdeR recognizes the intercistronic DNA, which leads to a diverse mode of response regulation. Unlocking the AdeRS mechanism provides ways to circumvent A. baumannii antibiotic resistance.
DOI: 10.3390/genes8010012
发表时间: 2016-12-28
期刊: Genes
影响因子: 3.5
作者:
Kröger C;Kary SC;Schauer K;Cameron AD
通讯作者: Cameron AD
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
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
双组分反应调节器 RstA 识别启动子 DNA 元件的结构动力学。
DOI: 10.1093/nar/gku572
发表时间: 2014-07
影响因子: 14.9
作者:
Li YC;Chang CK;Chang CF;Cheng YH;Fang PJ;Yu T;Chen SC;Li YC;Hsiao CD;Huang TH
通讯作者: Huang TH
DOI: 10.1016/j.mib.2010.01.015
发表时间: 2010-04
影响因子: 5.4
作者:
Bourret, Robert B.
通讯作者: Bourret, Robert B.