中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The mobility of PSI and PQ molecules in Spirulina platensis cells during state transition

文献类型:期刊论文

作者Zhang, Rui; Xie, Jie; Zhao, Jingquan
刊名PHOTOSYNTHESIS RESEARCH
出版日期2009-02-01
卷号99期号:2页码:107-113
关键词Cyanobacterium Mobility State Transition Phycobilisomes Photosystem i Monomerization Trimerization
ISSN号0166-8595
DOI10.1007/s11120-008-9400-4
英文摘要Monomerization and trimerization of photosystem I (PSI) in cyanobacteria are reversible to response to light switched off and on, which leads to "energy spillover" to regulate excitation of the two photosystems in balance. Considering that PSI is a trans-membrane protein embedded in thylakoid membranes, the monomerization or trimerization must involve a movement of PSI in the membranes. In this work, the mobility of PSI was demonstrated by dependence of the monomerization and trimerization on temperature for intact Spirulina platensis cells undergoing a light-to-dark or a dark-to-light transition. Based on the characteristic absorbance of monomers and trimmers, it confirms that both monomerization and trimerization are temperature-sensitive. The relative populations of the monomers and trimmers are invariable above the phase transition temperature (T (PT)) while directly proportional to temperature below T (PT). On the other hand, the rate to reach the equilibrium population is proportional to temperature above T (PT) but invariable below T (PT). The PSI mobility and the temperature-dependent population are contrary to those of plastoquinone (PQ) molecules because PSI is a trans-membrane protein while PQ molecules are small diffusive electron carriers in thylakoid membranes as well as their distinctive sizes and environments. The less monomerization of PSI but the invariable time constant at lower temperature below T (PT) may be due to that accumulation of the reduced PQ molecules results in decrease of the stromal-side H(+) concentration which is a driving force of PSI monomerization.
语种英语
WOS记录号WOS:000263544900004
出版者SPRINGER
源URL[http://ir.iccas.ac.cn/handle/121111/67867]  
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, CAS Key Lab Photochem, Beijing Natl Lab Mol Sci BNLMS, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Rui,Xie, Jie,Zhao, Jingquan. The mobility of PSI and PQ molecules in Spirulina platensis cells during state transition[J]. PHOTOSYNTHESIS RESEARCH,2009,99(2):107-113.
APA Zhang, Rui,Xie, Jie,&Zhao, Jingquan.(2009).The mobility of PSI and PQ molecules in Spirulina platensis cells during state transition.PHOTOSYNTHESIS RESEARCH,99(2),107-113.
MLA Zhang, Rui,et al."The mobility of PSI and PQ molecules in Spirulina platensis cells during state transition".PHOTOSYNTHESIS RESEARCH 99.2(2009):107-113.

入库方式: OAI收割

来源:化学研究所

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。