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	Simulation for the primary electronic donor of photosystem ii in vitro
	Pan, J; Zhang, CX; Gong, YD; Li, LB; Zhao, NM; Kuang, TY
刊名	Chinese science bulletin
	2000-05-01
卷号	45期号:10页码:914-920
关键词	Photosynthesis Chl a Histidine coordination P-680 Simulation Spectroscopy research
ISSN号	1001-6538
通讯作者	Zhang, cx()
英文摘要	Histidine coordinated to chi a is a distinct characteristic of chi a in vivo. by using histidine analogue of 1-methylimidazole (c4h6n2) and measuring the uv/vis absorption, cd and mcd spectra of the interaction between c4h6n2 and chi a in ccl4, we have obtained that: ( i) in pure ccl4 solvent, chi a molecule is in five-coordinate state, and two chi a molecules form an asymmetric compact-dimer with strong coupling interaction. we propose that the two chi a molecules are connected by two unequally coordinated mg-o bonds (the two oxygen atoms come from the c=o of c13(1) keto and c17 ester, respectively); (ii) when the molar ratio of c(4)h(6)n(3/)chl a is 0.5 or 1 (corresponding to 2chl a . 1c(4)h(6)n(2) and 2chl a . 2c(4)h(6)n(2), respectively), significant changes have been observed in the absorption, cd and mcd spectra, which indicate that the chi a remains in dimer form, but the coupling interaction between them reduces greatly. we postulate that c4h6n2 replaces the ligation of c=o of c17 ester and c131 keto to mg atoms sequentially. the two chi a molecules linked by two weakly interacted mg ... o bonds form a relaxed-dimer. the structure of the model is essentially similar to that of the primary electronic donor, p-680, of photosystem ii in high plants and algae.
WOS关键词	CARBON-TETRACHLORIDE ; VISIBLE ABSORPTION ; CHLOROPHYLL-A ; COORDINATION ; SPECTRUM ; MODEL
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000088416300012
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2373886
专题	物理研究所
通讯作者	Zhang, CX
作者单位	1.Chinese Acad Sci, Inst Bot, Photosynthesis Res Ctr, Beijing 100093, Peoples R China 2.Tsing Hua Univ, Dept Biol Sci & Biotechnol, Natl Lab Biomembranes & Membrane Biotechnol, Beijing 100084, Peoples R China 3.Chinese Acad Sci, Inst Phys, Lab Opt Phys, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Pan, J,Zhang, CX,Gong, YD,et al. Simulation for the primary electronic donor of photosystem ii in vitro[J]. Chinese science bulletin,2000,45(10):914-920.
APA	Pan, J,Zhang, CX,Gong, YD,Li, LB,Zhao, NM,&Kuang, TY.(2000).Simulation for the primary electronic donor of photosystem ii in vitro.Chinese science bulletin,45(10),914-920.
MLA	Pan, J,et al."Simulation for the primary electronic donor of photosystem ii in vitro".Chinese science bulletin 45.10(2000):914-920.

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