The state transition mechanism - simply depending on light-on and -off in Spirulina platensis

doi:10.1016/j.bbabio.2006.08.009

CORC > 化学研究所 > 中国科学院化学研究所

	The state transition mechanism - simply depending on light-on and -off in Spirulina platensis
	Li, Heng; Li, Donghui; Yang, Shuzhen; Xie, He; Zhao, Jingquan
刊名	BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
	2006-11-01
卷号	1757 期号:11 页码:1512-1519
关键词	Energy Spillover Mobile Phycobilisome Oligomerization Photosystem i Photosystem Ii State Transition
ISSN号	0005-2728
DOI	10.1016/j.bbabio.2006.08.009
英文摘要	The state transition in cyanobacteria is a long-discussed topic of how the photosynthetic machine regulates the excitation energy distribution in balance between the two photosystems. in the current work, whether the state transition is realized by "mobile phycobilisome (PBS)" or "energy spillover" has been clearly answered by monitoring the spectral responses of the intact cells of the cyanobacterium Spirulina platensis. Firstly, light-induced state transition depends completely on a movement of PBSs toward PSI or PSII while the redox-induced one on not only the "mobile PBS" but also an "energy spillover". Secondly, the "energy spillover" is triggered by dissociation of PSI trimers into the monomers which specially occurs under a case from light to dark, while the PSI monomers will re-aggregate into the trimers under a case from dark to light, i.e., the PSI oligomerization is reversibly regulated by light switch on and off. Thirdly, PSI oligomerization is regulated by the local H+ concentration on the cytosol side of the thylakoid membranes, which in turn is regulated by light switch on and off. Fourthly, PSI oligomerization change is the only mechanism for the "energy spillover". Thus, it can be concluded that the "mobile PBS" is a common rule for light-induced state transition while the "energy spillover" is only a special case when dark condition is involved. (c) 2006 Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000242668800009
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/58003]
专题	中国科学院化学研究所
通讯作者	Zhao, Jingquan
作者单位	Chinese Acad Sci, Inst Chem, Photochem Lab, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Li, Heng,Li, Donghui,Yang, Shuzhen,et al. The state transition mechanism - simply depending on light-on and -off in Spirulina platensis[J]. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,2006,1757(11):1512-1519.
APA	Li, Heng,Li, Donghui,Yang, Shuzhen,Xie, He,&Zhao, Jingquan.(2006).The state transition mechanism - simply depending on light-on and -off in Spirulina platensis.BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,1757(11),1512-1519.
MLA	Li, Heng,et al."The state transition mechanism - simply depending on light-on and -off in Spirulina platensis".BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1757.11(2006):1512-1519.