Structure of the RNA polymerase core-binding domain of sigma(54) reveals a likely conformational fracture point.
Structure of the RNA polymerase core-binding domain of sigma(54) reveals a likely conformational fracture point.
复制标题
DOI:
10.1016/j.jmb.2009.04.070
复制
发表时间:
2009-07-03
影响因子:
5.6
通讯作者:
Wemmer, David E.
中科院分区:
文献类型:
--
作者:
Hong, Eunmi;Doucleff, Michaeleen;Wemmer, David E.
Transcription initiation by bacterial σ54-RNA polymerase requires a conformational change of the holopolymerase-DNA complex, driven by an enhancer binding protein. Although structures of the core polymerase and the more common σ70 factor have been determined, little is known about the structure of the σ54 variant. We report here the structure of an Aquifex aeolicus σ54 domain, residues 69–198, which binds core RNA polymerase. The structure is comprised of two distinct subdomains held together by a small, conserved hydrophobic interface that appears to act as a fracture point in the structure. The N-terminal four-helical subdomain has a negative surface and conserved residues that likely contact the core polymerase, while the C-terminal three-helical bundle has a strongly positive patch that could contact DNA. Sequence conservation indicates that these structural features are conserved and are important for the role of σ54 in the polymerase complex.
登录
查看更多内容
影响因子:
16
作者:
Bose, Daniel;Pape, Tillmann;Burrows, Patricia C.;Rappas, Mathieu;Wigneshweraraj, Siva R.;Buck, Martin;Zhang, Xiaodong
通讯作者:
Zhang, Xiaodong
影响因子:
64.8
作者:
BURGESS, RR;TRAVERS, AA;BAUTZ, EKF
通讯作者:
BAUTZ, EKF
DOI:
10.1073/pnas.0408536102
发表时间:
2005-04-05
影响因子:
11.1
作者:
Fisher, MA;Grimm, D;Gherardini, FC
通讯作者:
Gherardini, FC
DOI:
10.1073/pnas.82.22.7525
发表时间:
1985-01-01
影响因子:
11.1
作者:
HIRSCHMAN, J;WONG, PK;KUSTU, S
通讯作者:
KUSTU, S
影响因子:
5.7
作者:
Chen, Baoyu;Doucleff, Michaeleen;Nixon, B. Tracy
通讯作者:
Nixon, B. Tracy