高分解能構造から見えてきた光合成水分解の仕組み

• 沈 建仁

  岡山大学大学院自然科学研究科

• 梅名 泰史

  大阪市立大学複合先端研究機構

• 川上 恵典

  大阪市立大学複合先端研究機構

• 神谷 信夫

  大阪市立大学複合先端研究機構

書誌事項

タイトル別名

• Mechanism of Photosynthetic Water-splitting Based on the High Resolution Structure of Photosystem II
• コウブンカイノウ コウゾウ カラ ミエテ キタ コウゴウセイ ミズブンカイ ノ シクミ

抄録

Photosystem II (PSII) is a membrane-protein complex consisting of 17 trans-membrane subunits and 3 peripheral, extrinsic subunits with a total molecular mass of 350 kDa for a monomer. PSII performs a series of light-induced electron transfer reactions, leading to the conversion of light energy into biologically useful chemical energy, coupled with this is the splitting of water and generation of molecular oxygen. Both the chemical energy converted and molecular oxygen generated by PSII are indispensible for sustaining life on the earth; thus PSII is an extremely important protein complex. We have succeeded in crystallizing the PSII complex at a resolution of 1.9 Å, and analyzed its structure. Here we describe the structure of PSII, in particular the Mn₄CaO₅-cluster, which is the catalytic center of water-splitting, analyzed at the atomic resolution. Based on these, we discuss the possible mechanisms of light-induced water-splitting and its implications in artificial photosynthesis.<br>

収録刊行物

• 生物物理

  生物物理 52 (3), 140-143, 2012

  一般社団法人 日本生物物理学会

キーワード

• Photosystem II
• oxygen evolution
• water splitting
• photosynthesis
• membrane proteins
• crystal structure

詳細情報

• CRID: 1390001206536294656
• NII論文ID: 10030317170
• NII書誌ID: AN00129693
• DOI: 10.2142/biophys.52.140
• COI: 1:CAS:528:DC%2BC38XptFGhsbs%3D
• ISSN: 13474219
• ISSN: 05824052
• NDL書誌ID: 023806731
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023806731
• Web Site: https://www.jstage.jst.go.jp/article/biophys/52/3/52_140/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可