Evolution of Photochemical Reaction Centres: More Twists?

被引：45

作者：

Cardona, Tanai ^{[1
]}

Rutherford, A. William ^{[1
]}

机构：

[1] Imperial Coll London, Dept Life Sci, London, England

来源：

TRENDS IN PLANT SCIENCE | 2019年 / 24卷 / 11期

基金：

英国生物技术与生命科学研究理事会;

关键词：

PHOTOSYNTHETIC REACTION-CENTER; SITE-DIRECTED MUTAGENESIS; WATER-OXIDIZING COMPLEX; PHOTOSYSTEM-II; ELECTRON-TRANSFER; EXTRINSIC PROTEINS; CHARGE SEPARATION; OXYGEN; TYROSINE; ORIGIN;

D O I：

10.1016/j.tplants.2019.06.016

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

One of the earliest events in the molecular evolution of photosynthesis is the structural and functional specialisation of type I (ferredoxin-reducing) and type II (quinone-reducing) reaction centres. In this opinion article we point out that the homodimeric type I reaction centre of heliobacteria has a calcium-binding site with striking structural similarities to the Mn4CaO5 duster of photosystem II. These similarities indicate that most of the structural elements required to evolve water oxidation chemistry were present in the earliest reaction centres. We suggest that the divergence of type I and type 11 reaction centres was made possible by a drastic structural shift linked to a change in redox properties that coincided with or facilitated the origin of photosynthetic water oxidation.

引用

页码：1008 / 1021

页数：14

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