ICCAS OpenIR
Low-temperature electron transfer suggests two types of Q(A) in intact photosystem II
Bao, Han; Zhang, Chunxi; Ren, Yanan; Zhao, Jingquan
2010-03-01
Source PublicationBIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
ISSN0005-2728
Volume1797Issue:3Pages:339-346
AbstractThe 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.
KeywordPhotosystem Ii q(a) Tyr(z) Side-path Electron Donor Electron Transfer Epr
DOI10.1016/j.bbabio.2009.12.001
Indexed BySCI
Language英语
WOS IDWOS:000274772900002
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/70580
Collection中国科学院化学研究所
Corresponding AuthorZhang, Chunxi
AffiliationChinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Lab Photochem, Beijing 100190, Peoples R China
Recommended Citation
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.
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