Rewiring photosynthesis: engineering wrong-way electron transfer in the purple bacterial reaction centre.

Rewiring photosynthesis: engineering wrong-way electron transfer in the purple bacterial reaction centre.
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重新布线光合作用:在紫色细菌反应中心设计错误的电子转移方式。

DOI:
10.1042/bst0330851
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发表时间:
2005
影响因子:
3.9
通讯作者:
Michael R. Jones
Michael R. Jones
中科院分区:
生物学3区
文献类型:
--
作者:
M. C. Wakeham;Michael R. Jones

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紫色细菌反应中心利用光能分离细胞质膜上的电荷,还原泛醌并氧化c型细胞色素。该蛋白质具有宏观结构的双重对称性,但显示出很强的功能不对称性,辅助因子的两个可用跨膜分支(所谓的A分支)中只有一个用于催化光化学电荷分离。这种功能不对称背后的因素已经研究了很多年,但仍然没有完全理解。定点诱变已部分成功地改变电子转移沿着通常无活性的B-分支,允许两个分支上的等效电子转移反应的动力学比较。B-分支上的初级和次级电子转移步骤似乎比它们的A-分支对应物慢得多。讨论了不同突变在改变电子转移沿着辅因子的B-分支的有效性。
The purple bacterial reaction centre uses light energy to separate charge across the cytoplasmic membrane, reducing ubiquinone and oxidizing a c-type cytochrome. The protein possesses a macroscopic structural two-fold symmetry but displays a strong functional asymmetry, with only one of two available membrane-spanning branches of cofactors (the so-called A-branch) being used to catalyse photochemical charge separation. The factors underlying this functional asymmetry have been the subject of study for many years but are still not fully understood. Site-directed mutagenesis has been partially successful in rerouting electron transfer along the normally inactive B-branch, allowing comparison of the kinetics of equivalent electron transfer reactions on the two branches. Both the primary and secondary electron transfer steps on the B-branch appear to be considerably slower than their A-branch counterparts. The effectiveness of different mutations in rerouting electron transfer along the B-branch of cofactors is discussed.
细菌光合作用中电荷分离的静电控制。
DOI: 10.1016/0005-2728(90)90192-7
发表时间: 1990
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Parson,WW;Chu,ZT;Warshel,A
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期刊: BIOCHEMISTRY
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DOI: 10.1073/pnas.84.16.5730
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影响因子: 11.1
作者:
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