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タイトル: Cationic state distribution over the chlorophyll d-containing P(D1)/P(D2) pair in photosystem II.
著者: Saito, Keisuke
Shen, Jian-Ren
Ishikita, Hiroshi
著者名の別形: 石北, 央
キーワード: Photosystem II
Chlorophyll d
Spin density distribution
Acaryochloris marina
Redox potential
P680
発行日: Aug-2012
出版者: Elsevier B.V.
誌名: Biochimica et biophysica acta
巻: 1817
号: 8
開始ページ: 1191
終了ページ: 1195
抄録: Most of the chlorophyll (Chl) cofactors in photosystem II (PSII) from Acaryochloris marina are Chld, although a few Chla molecules are also present. To evaluate the possibility that Chla may participate in the P(D1)/P(D2) Chl pair in PSII from A. marina, the P(D1)(•+)/P(D2)(•+) charge ratio was investigated using the PSII crystal structure analyzed at 1.9-Å resolution, while considering all possibilities for the Chld-containing P(D1)/P(D2) pair, i.e., Chld/Chld, Chla/Chld, and Chld/Chla pairs. Chld/Chld and Chla/Chld pairs resulted in a large P(D1)(•+) population relative to P(D2)(•+), as identified in Chla/Chla homodimer pairs in PSII from other species, e.g., Thermosynechococcus elongatus PSII. However, the Chld/Chla pair possessed a P(D1)(•+)/P(D2)(•+) ratio of approximately 50/50, which is in contrast to previous spectroscopic studies on A. marina PSII. The present results strongly exclude the possibility that the Chld/Chla pair serves as P(D1)/P(D2) in A. marina PSII. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial.
著作権等: © 2011 Elsevier B.V.
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/169710
DOI(出版社版): 10.1016/j.bbabio.2011.12.003
PubMed ID: 22192718
出現コレクション:学術雑誌掲載論文等

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