Organisation of Photosystern I and Photosystem II in red alga Cyanidium caldarium:: Encounter of cyanobacterial and higher plant concepts
Organisation of Photosystern I and Photosystem II in red alga Cyanidium caldarium:: Encounter of cyanobacterial and higher plant concepts
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DOI：
10.1016/j.bbabio.2007.01.021
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发表时间：
2007-06-01
影响因子：
4.3
通讯作者：
Vacha, Frantisek
中科院分区：
文献类型：
--
作者：
Gardian, Zdenko;Bumba, Ladislav;Vacha, Frantisek
利用电子显微镜和单粒子图像分析技术，对从红藻蓝藻Caldarium中分离得到的光系统、光系统I和光系统II的结构和组成进行了研究。光系统II的整体结构与已知的蓝藻相似。另外的20 kDa(PsbQ‘)外源蛋白可能位于细胞色素c-550(PsbV)和12 kDa(PsbU)蛋白附近。光系统I被确定为由psaA/B核心复合体和不同数量的天线亚单位组成的单体。这些亚基的数量被认为取决于细胞培养过程中使用的光条件。讨论了光系统I的PsaH和PsaG蛋白在三聚化和触角复合体结合中的作用。(C)2007 Elsevier B.V.保留所有权利。
Structure and organisation of Photosystem, I and Photosystem II isolated from red alga Cyanidium caldarium was determined by electron microscopy and single particle image analysis. The overall structure of Photosystem II was found to be similar to that known from cyanobacteria. The location of additional 20 kDa (PsbQ') extrinsic protein that forms part of the oxygen evolving complex was suggested to be in the vicinity of cytochrome c-550 (PsbV) and the 12 kDa (PsbU) protein. Photosystem I was determined as a monomeric unit consisting of PsaA/B core complex with varying amounts of antenna subunits attached. The number of these subunits was seen to be dependent on the light conditions used during cell cultivation. The role of PsaH and PsaG proteins of Photosystem I in trimerisation and antennae complexes binding is discussed. (c) 2007 Elsevier B.V. All rights reserved.