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Allophycocyanin A is a carbon dioxide receptor in the cyanobacterial phycobilisome

Author

Listed:
  • Alejandra Guillén-García

    (Durham University)

  • Savannah E. R. Gibson

    (Durham University)

  • Caleb J. C. Jordan

    (Durham University)

  • Venkata K. Ramaswamy

    (Durham University)

  • Victoria L. Linthwaite

    (Durham University)

  • Elizabeth H. C. Bromley

    (Durham University)

  • Adrian P. Brown

    (Durham University)

  • David R. W. Hodgson

    (Durham University
    Durham University)

  • Tim R. Blower

    (Durham University
    Durham University)

  • Jan R. R. Verlet

    (Durham University)

  • Matteo T. Degiacomi

    (Durham University
    Durham University)

  • Lars-Olof Pålsson

    (Durham University
    Durham University)

  • Martin J. Cann

    (Durham University
    Durham University)

Abstract

Light harvesting is fundamental for production of ATP and reducing equivalents for CO2 fixation during photosynthesis. However, electronic energy transfer (EET) through a photosystem can harm the photosynthetic apparatus when not balanced with CO2. Here, we show that CO2 binding to the light-harvesting complex modulates EET in photosynthetic cyanobacteria. More specifically, CO2 binding to the allophycocyanin alpha subunit of the light-harvesting complex regulates EET and its fluorescence quantum yield in the cyanobacterium Synechocystis sp. PCC 6803. CO2 binding decreases the inter-chromophore distance in the allophycocyanin trimer. The result is enhanced EET in vitro and in live cells. Our work identifies a direct target for CO2 in the cyanobacterial light-harvesting apparatus and provides insights into photosynthesis regulation.

Suggested Citation

  • Alejandra Guillén-García & Savannah E. R. Gibson & Caleb J. C. Jordan & Venkata K. Ramaswamy & Victoria L. Linthwaite & Elizabeth H. C. Bromley & Adrian P. Brown & David R. W. Hodgson & Tim R. Blower , 2022. "Allophycocyanin A is a carbon dioxide receptor in the cyanobacterial phycobilisome," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32925-6
    DOI: 10.1038/s41467-022-32925-6
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    References listed on IDEAS

    as
    1. Lvqin Zheng & Zhenggao Zheng & Xiying Li & Guopeng Wang & Kun Zhang & Peijun Wei & Jindong Zhao & Ning Gao, 2021. "Structural insight into the mechanism of energy transfer in cyanobacterial phycobilisomes," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    2. Jun Zhang & Jianfei Ma & Desheng Liu & Song Qin & Shan Sun & Jindong Zhao & Sen-Fang Sui, 2017. "Structure of phycobilisome from the red alga Griffithsia pacifica," Nature, Nature, vol. 551(7678), pages 57-63, November.
    3. Victoria L. Linthwaite & Joanna M. Janus & Adrian P. Brown & David Wong-Pascua & AnnMarie C. O’Donoghue & Andrew Porter & Achim Treumann & David R. W. Hodgson & Martin J. Cann, 2018. "The identification of carbon dioxide mediated protein post-translational modifications," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
    4. Victoria L. Linthwaite & Joanna M. Janus & Adrian P. Brown & David Wong-Pascua & AnnMarie C. O’Donoghue & Andrew Porter & Achim Treumann & David R. W. Hodgson & Martin J. Cann, 2018. "Author Correction: The identification of carbon dioxide mediated protein post-translational modifications," Nature Communications, Nature, vol. 9(1), pages 1-1, December.
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