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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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