Cryo-EM structure of the photosynthetic RC-LH1-PufX supercomplex at 2.8-Å resolution.

Cryo-EM structure of the photosynthetic RC-LH1-PufX supercomplex at 2.8-Å resolution.
复制标题

光合作用RC-LH1-PufX超配合物在2.8-Å分辨率下的低温电镜结构

DOI:
10.1126/sciadv.abf8864
复制
发表时间:
2021-06
期刊:
影响因子:
13.6
通讯作者:
Liu LN
Liu LN
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Bracun L;Yamagata A;Christianson BM;Terada T;Canniffe DP;Shirouzu M;Liu LN

文献摘要

参考文献

被引文献

相似文献

第一个RC-LH1-PufX超复合体的原子结构为光合作用系统的组装和功能提供了新的见解。反应中心(RC)−捕光复合体1(LH1超复合体)在细菌光合作用中起着关键作用。许多RC-LH1复合体整合了一种额外的蛋白质PufX,这是细菌生长和光合作用能力的关键。在这里,我们提出了一个冷冻电子显微镜结构的RC-LH1-PufX超复合体,从红细菌veldkampii在2.8 ra的分辨率。Rc-LH1-PufX单体含有一个由15个αβ多肽组成的LH环,其中有一个由PufX形成的30?间隙。PufX起到分子“交叉支撑”的作用,以增强RC-LH1结构。不寻常的PufX介导的LH1环上的大开口以及确定的蛋白质和辅因子的排列为组装强大的RC-LH1-PufX超复合物以及有效的苯醌转运和电子转移提供了分子基础。这些建筑特征代表了缺氧光合作用和环境适应的自然策略。
Atomic structure of the first RC-LH1-PufX supercomplex provides new insights into the assembly and function of photosynthetic systems. The reaction center (RC)−light-harvesting complex 1 (LH1) supercomplex plays a pivotal role in bacterial photosynthesis. Many RC-LH1 complexes integrate an additional protein PufX that is key for bacterial growth and photosynthetic competence. Here, we present a cryo–electron microscopy structure of the RC-LH1-PufX supercomplex from Rhodobacter veldkampii at 2.8-Å resolution. The RC-LH1-PufX monomer contains an LH ring of 15 αβ-polypeptides with a 30-Å gap formed by PufX. PufX acts as a molecular “cross brace” to reinforce the RC-LH1 structure. The unusual PufX-mediated large opening in the LH1 ring and defined arrangement of proteins and cofactors provide the molecular basis for the assembly of a robust RC-LH1-PufX supercomplex and efficient quinone transport and electron transfer. These architectural features represent the natural strategies for anoxygenic photosynthesis and environmental adaptation.
DOI: 10.1073/pnas.162368399
发表时间: 2002-08-20
影响因子: 11.1
作者:
Camara-Artigas, A;Brune, D;Allen, JP
通讯作者: Allen, JP
DOI: 10.1021/ct700301q
发表时间: 2008-03-01
影响因子: 5.5
作者:
Hess, Berk;Kutzner, Carsten;Lindahl, Erik
通讯作者: Lindahl, Erik
DOI: 10.1021/jp101759q
发表时间: 2010-06-17
影响因子: 3.3
作者:
Klauda, Jeffery B.;Venable, Richard M.;Freites, J. Alfredo;O'Connor, Joseph W.;Tobias, Douglas J.;Mondragon-Ramirez, Carlos;Vorobyov, Igor;MacKerell, Alexander D., Jr.;Pastor, Richard W.
通讯作者: Pastor, Richard W.
DOI: 10.1021/ct700200b
发表时间: 2008-01-01
影响因子: 5.5
作者:
Hess, Berk
通讯作者: Hess, Berk
DOI: 10.1021/ct300400x
发表时间: 2012-09-11
影响因子: 5.5
作者:
Best, Robert B.;Zhu, Xiao;Shim, Jihyun;Lopes, Pedro E. M.;Mittal, Jeetain;Feig, Michael;MacKerell, Alexander D., Jr.
通讯作者: MacKerell, Alexander D., Jr.