2021年12月
Structure of the far-red light utilizing photosystem I of Acaryochloris marina
Nature Communications
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- 巻
- 12
- 号
- 1
- 開始ページ
- 2333
- 終了ページ
- 2333
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/s41467-021-22502-8
- 出版者・発行元
- Springer Science and Business Media LLC
<title>Abstract</title><italic>Acaryochloris marina</italic> is one of the cyanobacterial species that can use far-red light to drive photochemical reactions for oxygenic photosynthesis. Here, we report the structure of <italic>A. marina</italic> photosystem I (PSI) reaction center, determined by cryo-electron microscopy at 2.58 Å resolution. The structure reveals an arrangement of electron carriers and light-harvesting pigments distinct from other type I reaction centers. The paired chlorophyll, or special pair (also referred to as P740 in this case), is a dimer of chlorophyll <italic>d</italic> and its epimer chlorophyll <italic>d</italic>′. The primary electron acceptor is pheophytin <italic>a</italic>, a metal-less chlorin. We show the architecture of this PSI reaction center is composed of 11 subunits and we identify key components that help explain how the low energy yield from far-red light is efficiently utilized for driving oxygenic photosynthesis.
- リンク情報
- ID情報
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- DOI : 10.1038/s41467-021-22502-8
- eISSN : 2041-1723
- PubMed ID : 33879791
- PubMed Central 記事ID : PMC8058080