Structural dynamics of the two-component response regulator RstA in recognition of promoter DNA element.

Structural dynamics of the two-component response regulator RstA in recognition of promoter DNA element.
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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
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发表时间:
2014-07
影响因子:
14.9
通讯作者:
Huang TH
Huang TH
中科院分区:
生物学2区
文献类型:
--
作者:
Li YC;Chang CK;Chang CF;Cheng YH;Fang PJ;Yu T;Chen SC;Li YC;Hsiao CD;Huang TH

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RstA/RstB系统是由膜传感器RstB及其同源反应调节子(RR)RstA组成的细菌双组分调节系统。肺炎克雷伯氏菌的RstA(kpRstA)由N-末端受体结构域(RD,残基1-119)和C-末端DNA结合结构域(DBD,残基130-236)组成。kpRstA的磷酸化诱导二聚化,这允许两个kpRstA DBD结合到称为RstA盒的串联重复序列,并调节下游基因的表达。在这里,我们报告的解决方案和晶体结构的自由kpRstA RD,DBD和DBD/RstA盒DNA复合物。的kpRstA DBD/RstA盒复合物的结构表明,这两个protomer与RstA盒以不对称的方式相互作用。平衡结合研究进一步揭示了kpRstA二聚体内的两个原聚体以顺序的方式与RstA盒结合。两者合计,我们的研究结果表明一个结合模型,其中kpRstA RD的二聚化提供了一个平台,使第一kpRstA DBD原体锚蛋白-DNA相互作用,而第二个原体在确保正确识别的RstA框中起着关键作用。
The RstA/RstB system is a bacterial two-component regulatory system consisting of the membrane sensor, RstB and its cognate response regulator (RR) RstA. The RstA of Klebsiella pneumoniae (kpRstA) consists of an N-terminal receiver domain (RD, residues 1–119) and a C-terminal DNA-binding domain (DBD, residues 130–236). Phosphorylation of kpRstA induces dimerization, which allows two kpRstA DBDs to bind to a tandem repeat, called the RstA box, and regulate the expression of downstream genes. Here we report the solution and crystal structures of the free kpRstA RD, DBD and DBD/RstA box DNA complex. The structure of the kpRstA DBD/RstA box complex suggests that the two protomers interact with the RstA box in an asymmetric fashion. Equilibrium binding studies further reveal that the two protomers within the kpRstA dimer bind to the RstA box in a sequential manner. Taken together, our results suggest a binding model where dimerization of the kpRstA RDs provides the platform to allow the first kpRstA DBD protomer to anchor protein–DNA interaction, whereas the second protomer plays a key role in ensuring correct recognition of the RstA box.
DOI: 10.1128/jb.00637-06
发表时间: 2006-11-01
影响因子: 3.2
作者:
Dyer, Collin M.;Dahlquist, Frederick W.
通讯作者: Dahlquist, Frederick W.
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: 10.1023/a:1008301415843
发表时间: 1999-02-01
影响因子: 2.7
作者:
Cordier, F;Dingley, AJ;Grzesiek, S
通讯作者: Grzesiek, S
DOI: 10.1016/s0969-2126(02)00761-x
发表时间: 2002-05-01
期刊: STRUCTURE
影响因子: 5.7
作者:
Blanco, AG;Sola, M;Coll, M
通讯作者: Coll, M
DOI: 10.1074/jbc.m110952200
发表时间: 2002-05-03
影响因子: 4.8
作者:
Chang, CF;Chou, HT;Huang, TH
通讯作者: Huang, TH