Reconstruction of the water-oxidizing complex in manganese-depleted Photosystem II using synthetic manganese complexes

被引：6

作者：

Han, GY

Li, J

Chen, GY

Ling, L

Li, SQ ^{[1
]}

Khorobrykh, AA

Zharmukhamedov, SK

Klimov, VV

Kuang, TY

机构：

[1] Chinese Acad Sci, Inst Bot, Photosynth Res Ctr, Key Lab Photosynth & Environm Mol Phys, Beijing 100093, Peoples R China

[2] NW Univ Xian, Dept Chem, Xian 710069, Peoples R China

[3] Russian Acad Sci, Inst Basic Biol Problem, Pushchino 142290, Moscow Region, Russia

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY | 2005年 / 81卷 / 02期

基金：

俄罗斯基础研究基金会; 中国国家自然科学基金;

关键词：

synthetic manganese complex; water-oxidizing complex; reconstruction;

D O I：

10.1016/j.jphotobiol.2005.04.009

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The efficiency of a trinuclear and two binuclear manganese complexes in reconstituting electron transport and O-2 evolution activity in Mn-depleted Photosystem II preparations is analyzed. The trinuclear Mn-complex is more efficient than two binuclear Mn-complexes in restoring oxygen evolution, but it is less effective as an electron donor than binuclear Mn-complexes. It is inferred from our results that recovery of electron transport and O-2 evolution with polynuclear Mn-complexes is affected with different factors. Moreover, the trinuclear Mn-complex is extremely sensitive to the addition of CaCl2. It is suggested that there is an interaction between Ca2+ and carboxyl within the trinuclear Mn-complex during photoactivation and this interaction benefits the ligation of Mn atom to the apo-WOC and form an active WOC. Binuclear Mn(III)Mn(III) complex shows slightly higher efficiency than binuclear Mn(III)Mn(IV) complex in restoration of O-2 evolution activity. The efficiency of three Mn-complexes in the reconstitution of WOC is in an order: trinuclear Mn-3(III) > binuclear Mn(TIT)Mn(III) > binuclear Mn(III)Mn(IV). (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：114 / 120

页数：7

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