Structure of a large photosystem II supercomplex from Acaryochloris marina

被引：53

作者：

Chen, M

Bibby, TS

Nield, J

Larkum, AWD

Barber, J

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Biol Sci, Wolfson Labs, London SW7 2AZ, England

[2] Univ Sydney, Sch Biol Sci, Sydney, NSW 2006, Australia

[3] Inst Marine Marine & Coastal Studies, New Brunswick, NJ USA

来源：

FEBS LETTERS | 2005年 / 579卷 / 05期

基金：

澳大利亚研究理事会; 英国生物技术与生命科学研究理事会;

关键词：

photosynthesis; photosystem II; electron microscopy; Pcb proteins; Acaryochloris marina;

D O I：

10.1016/j.febslet.2005.01.023

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：

Acaryochloris marina is a prochlorophyte-like cyanobacterium containing both phycobilins and chlorophyll d as light harvesting pigments. We show that the chlorophyll d light harvesting system, composed of Pcb proteins, functionally associates with the photosystem II (PSII) reaction center (RC) core to form a giant supercomplex. This supercomplex has a molecular mass of about 2300 kDa and dimensions of 385 Angstrom x 240 Angstrom. It is composed of two PSII-RC core dimers arranged end-to-end, flanked by eight symmetrically related Pcb proteins on each side. Thus each PSII-RC monomer has four Pcb subunits acting as a light harvesting system which increases the absorption cross section of the PSII-RC core by almost 200%. (C) 2005 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.

引用

页码：1306 / 1310

页数：5

共 33 条

[1] Low-light-adapted Prochlorococcus species possess specific antennae for each photosystem [J].