Structure of a large photosystem II supercomplex from Acaryochloris marina

Structure of a large photosystem II supercomplex from Acaryochloris marina
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Acaryocholis marina 大型光系统 II 超复合物的结构

DOI:
10.1016/j.febslet.2005.01.023
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发表时间:
2005
期刊:
影响因子:
3.5
通讯作者:
J. Barber
J. Barber
中科院分区:
生物学3区
文献类型:
--
作者:
Min Chen;T. Bibby;Jon Nield;A. Larkum;J. Barber

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Acaryo绿藻是一种类似原叶绿藻的蓝细菌,含有藻胆素和叶绿素 d 作为光捕获色素。我们发现,由 Pcb 蛋白组成的叶绿素 d 光捕获系统在功能上与光系统 II (PSII) 反应中心 (RC) 核心结合,形成一个巨大的超级复合物。该超级复合物的分子量约为2300kDa,尺寸为385Å×240Å。它由两个首尾相连的 PSII-RC 核心二聚体组成,两侧各有八个对称相关的 Pcb 蛋白。因此,每个 PSII-RC 单体都有四个 Pcb 亚基,充当光捕获系统,将 PSII-RC 核心的吸收截面增加了近 200%。
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 2300kDa and dimensions of 385Å×240Å. 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%.
DOI: 10.1002/jemt.1060090405
发表时间: 1988-08-01
期刊: JOURNAL OF ELECTRON MICROSCOPY TECHNIQUE
影响因子: --
作者:
RADERMACHER, M
通讯作者: RADERMACHER, M