Low-temperature electron transfer suggests two types of Q(A) in intact photosystem II
文献类型：期刊论文
| 作者 | Bao, Han; Zhang, Chunxi; Ren, Yanan; Zhao, Jingquan |
| 刊名 | BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
 |
| 出版日期 | 2010-03-01 |
| 卷号 | 1797期号:3页码:339-346 |
| 关键词 | Photosystem Ii q(a) Tyr(z) Side-path Electron Donor Electron Transfer Epr |
| ISSN号 | 0005-2728 |
| DOI | 10.1016/j.bbabio.2009.12.001 |
| 英文摘要 | The correlation between the reduction of Q(A) and the oxidation of Tyr(z) or Car/Chl(z)/Cyt(b559) in spinach PSII enriched membranes induced by visible light at 10 K is studied by using electron paramagnetic resonance spectroscopy. Similar g = 1.95-1.86 Q(A)(-center dot)EPR signals are observed in both Mn-depleted and intact samples, and both signals are long lived at low temperatures. The presence of PPBQ significantly diminished the light induced EPR signals from Q(A)(-center dot), Car(+center dot)/Chl(+center dot) and oxidized Cyt(b559), while enhancing the amplitude of the S(1)Tyr(z)(center dot) EPR signal in the intact PSII sample. The quantification and stability of the g = 1.95-1.86 EPR signal and signals arising from the oxidized Tyrz and the side-path electron donors, respectively, indicate that the EPR-detectable g = 1.95-1.86 Q(A)(-center dot) signal is only correlated to reaction centers undergoing oxidation of the side-path electron donors (Car/Chl(z)/Cyt(b559)), but not of Tyr(z). These results imply that two types of Q(A)(-center dot) probably exist in the intact PSII sample. The structural difference and possible function of the two types of QA are discussed. (C) 2009 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000274772900002 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/70579]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhang, Chunxi |
| 作者单位 | Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Lab Photochem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bao, Han,Zhang, Chunxi,Ren, Yanan,et al. Low-temperature electron transfer suggests two types of Q(A) in intact photosystem II[J]. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,2010,1797(3):339-346. |
| APA | Bao, Han,Zhang, Chunxi,Ren, Yanan,&Zhao, Jingquan.(2010).Low-temperature electron transfer suggests two types of Q(A) in intact photosystem II.BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,1797(3),339-346. |
| MLA | Bao, Han,et al."Low-temperature electron transfer suggests two types of Q(A) in intact photosystem II".BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1797.3(2010):339-346. |
入库方式： OAI收割
来源：化学研究所
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