TY - JOUR
T1 - Structure of the far-red light utilizing photosystem I of Acaryochloris marina
AU - Hamaguchi, Tasuku
AU - Kawakami, Keisuke
AU - Shinzawa-Itoh, Kyoko
AU - Inoue-Kashino, Natsuko
AU - Itoh, Shigeru
AU - Ifuku, Kentaro
AU - Yamashita, Eiki
AU - Maeda, Kou
AU - Yonekura, Koji
AU - Kashino, Yasuhiro
N1 - Funding Information:
K.K. is grateful to Prof. Nobuo Kamiya (Osaka City University) for providing laboratory access. K.I. would like to thank Mr. Yuzo Watanabe (Proteomics Facility, Graduate School of Biostudies, Kyoto University) for his help with mass spectrometric analysis. We are grateful to Ms. Yoko Kunishima and Ms. Kyoko Ishino for their technical assistance, to Prof. Tatsuya Tomo (Faculty of Science Division I, Tokyo University of Science) for providing spectral data of Halomicronema hongdechloris. We thank James Allen, DPhil, and Jeremy Kamen, M.Sc. Biology, from the Edanz Group (https://en-author-services. edanzgroup.com/), and Dr. David Mcintosh for editing this manuscript. This work was supported by grants-in-aid from the Japan Society for the Promotion of Science (Grant 18H05175 to Y.K.; 16H04757 to K.Y.; 16H06554 to K.I.; and 20K06684 to S.I., 20K06515 to T.H.; and 20H05109 and 20K06528 to K.K.), the RIKEN Pioneering Project, Dynamic Structural Biology (to T.H. and K.Y.), the Cyclic Innovation for Clinical Empowerment (CiCLE) from the Japan Agency for Medical Research and Development, AMED (to T.H. and K.Y.), Innovations for Light-Energy Conversion (I4LEC; to Y.K.), and JST-Mirai Program Grant Number JPMJMI20G5 (to K.Y.).
Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Acaryochloris marina 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 A. marina 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 d and its epimer chlorophyll d′. The primary electron acceptor is pheophytin a, 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.
AB - Acaryochloris marina 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 A. marina 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 d and its epimer chlorophyll d′. The primary electron acceptor is pheophytin a, 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.
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U2 - 10.1038/s41467-021-22502-8
DO - 10.1038/s41467-021-22502-8
M3 - Article
C2 - 33879791
AN - SCOPUS:85104576592
SN - 2041-1723
VL - 12
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 2333
ER -