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Isolation of the elusive supercomplex that drives cyclic electron flow in photosynthesis

Author

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  • Masakazu Iwai

    (Institute of Low Temperature Science, Hokkaido University
    Present address: Real-Time Bio-Imaging Research Team, Extreme Photonics Research Group, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.)

  • Kenji Takizawa

    (Institute of Low Temperature Science, Hokkaido University)

  • Ryutaro Tokutsu

    (Institute of Low Temperature Science, Hokkaido University)

  • Akira Okamuro

    (Faculty of Science, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan)

  • Yuichiro Takahashi

    (Faculty of Science, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan)

  • Jun Minagawa

    (Institute of Low Temperature Science, Hokkaido University)

Abstract

Photosynthesis: a supercomplex of supercomplexes During photosynthesis, light energy is utilized by photosystems 1 (PSI) and II (PSII), located in the thylakoid membranes of chloroplasts, to establish an electron flow that ultimately results in the production of ATP and NADPH. Two modes of electron flow exist — a linear electron flow and a cyclic electron flow. The latter pathway generates more ATP but the molecular components of the supercomplex involved in the process have remained elusive. This issue is now addressed directly in the green alga Chlamydomonas reinhardtii. A combination of biochemical and spectroscopic techniques reveals the supercomplex that drives cyclic electron flow to be made up not only of the photosystem/peripheral antenna supercomplex, but also of two known redox proteins — cytochrome b6f complex and ferredoxin-NADPH oxidoreductase (FNR) — with a few small proteins as well.

Suggested Citation

  • Masakazu Iwai & Kenji Takizawa & Ryutaro Tokutsu & Akira Okamuro & Yuichiro Takahashi & Jun Minagawa, 2010. "Isolation of the elusive supercomplex that drives cyclic electron flow in photosynthesis," Nature, Nature, vol. 464(7292), pages 1210-1213, April.
    • Handle: RePEc:nat:nature:v:464:y:2010:i:7292:d:10.1038_nature08885
    DOI: 10.1038/nature08885
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    Cited by:

    1. Ringsmuth, Andrew K. & Landsberg, Michael J. & Hankamer, Ben, 2016. "Can photosynthesis enable a global transition from fossil fuels to solar fuels, to mitigate climate change and fuel-supply limitations?," Renewable and Sustainable Energy Reviews, Elsevier, vol. 62(C), pages 134-163.

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