Hydrogen ions directly regulating the oligomerization state of Photosystem I in intact Spirulina platensis cells  

作　　者：ZHANG Rui XIE Jie HU ChangChao ZHAO JingQuan 

机构地区：[1]Beijing National Laboratory for Molecular Sciences (BNLMS), and Key Laboratory of Photochemistry of CAS, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Chinese Science Bulletin》2008年第2期317-320,共4页

基　　金：the National Natural Science Foundation of China (Grant Nos. 30570422, 50221201, 90306013 and 30470377)

摘　　要：H+ concentration induced-monomerization or trimerization of photosystem I (PSI) in cyanobacteria has never been directly observed. In this work, taking characteristic spectra for the trimers and monomers as the indicators, it was experimentally demonstrated that H+ could induce the oligomeric changes of PSI reaction centers in the intact Spirulina platensis cells and also in the isolated thylakoid membrane complexes. Especially, the higher concentration of H+ would induce the monomerization while the lower the trimerization, suggesting the electrostatic interaction should be mainly responsible for changes in the oligomeric state of PSI in Spirulina platensis.H^＋ concentration induced-monomerization or trimerization of photosystem Ⅰ （PSI） in cyanobacteria has never been directly observed. In this work, taking characteristic spectra for the trimers and monomers as the indicators, it was experimentally demonstrated that H^＋ could induce the oligomeric changes of PSI reaction centers in the intact Spirulina platensis cells and also in the isolated thylakoid membrane complexes. Especially, the higher concentration of H^＋ would induce the monomerization while the lower the trimerization, suggesting the electrostatic interaction should be mainly responsible for changes in the oligomeric state of PSI in Spirulina platensis.

关 键 词：光合体系 三聚作用 氢离子 植物细胞 低聚反应 

分 类 号：Q945.11[生物学—植物学]