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Energetics of proton release on the first oxidation step in the water-oxidizing enzyme
http://hdl.handle.net/2261/58606
http://hdl.handle.net/2261/58606668b9ec9-5078-4fe8-951b-b2e5527c9519
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ncomms9488.pdf (1.5 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2015-10-20 | |||||
| タイトル | ||||||
| タイトル | Energetics of proton release on the first oxidation step in the water-oxidizing enzyme | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Chemical sciences | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Biochemistry | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Biophysics | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | journal article | |||||
| 著者 |
Saito, Keisuke
× Saito, Keisuke× Rutherford, A. William× Ishikita, Hiroshi |
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| 著者所属 | ||||||
| 著者所属 | Research Center for Advanced Science and Technology, The University of Tokyo | |||||
| 著者所属 | ||||||
| 著者所属 | Department of Applied Chemistry, The University of Tokyo | |||||
| 著者所属 | ||||||
| 著者所属 | Japan Science and Technology Agency (JST), PRESTO | |||||
| 著者所属 | ||||||
| 著者所属 | Department of Life Sciences, Sir Ernst Chain Building, Imperial College London | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In photosystem II (PSII), the Mn4CaO5 cluster catalyses the water splitting reaction. The crystal structure of PSII shows the presence of a hydrogen-bonded water molecule directly linked to O4. Here we show the detailed properties of the H-bonds associated with the Mn4CaO5 cluster using a quantum mechanical/molecular mechanical approach. When O4 is taken as a μ-hydroxo bridge acting as a hydrogen-bond donor to water539 (W539), the S0 redox state best describes the unusually short O4–OW539 distance (2.5 Å) seen in the crystal structure. We find that in S1, O4 easily releases the proton into a chain of eight strongly hydrogen-bonded water molecules. The corresponding hydrogen-bond network is absent for O5 in S1. The present study suggests that the O4-water chain could facilitate the initial deprotonation event in PSII. This unexpected insight is likely to be of real relevance to mechanistic models for water oxidation. | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | UTokyo Research掲載「光合成の水分解反応初期に水素イオンが放出される仕組みを解明」 URI: http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/pathway-for-initial-proton-released-from-water-oxidizing-enzyme.html | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | UTokyo Research "Pathway for initial proton released from water-oxidizing enzyme" URI: http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/pathway-for-initial-proton-released-from-water-oxidizing-enzyme.html | |||||
| 書誌情報 |
Nature communications 巻 6, p. 8488, 発行日 2015-10-07 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 20411723 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA12645905 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.1038/ncomms9488 | |||||
| 権利 | ||||||
| 権利情報 | Copyright © 2015, Rights Managed by Nature Publishing Group | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
| 出版者 | ||||||
| 出版者 | Nature Publishing Group | |||||
| 関係URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/pathway-for-initial-proton-released-from-water-oxidizing-enzyme.html | |||||
| 関係URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/pathway-for-initial-proton-released-from-water-oxidizing-enzyme.html | |||||
| 関係URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.nature.com/ncomms/2015/151007/ncomms9488/abs/ncomms9488.html | |||||
