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Observation of dissipative chlorophyll-to-carotenoid energy transfer in light-harvesting complex II in membrane nanodiscs

Author

Listed:
  • Minjung Son

    (Massachusetts Institute of Technology)

  • Alberta Pinnola

    (University of Pavia
    University of Verona)

  • Samuel C. Gordon

    (Massachusetts Institute of Technology
    Agenus Inc.)

  • Roberto Bassi

    (University of Verona
    Accademia Nazionale di Lincei)

  • Gabriela S. Schlau-Cohen

    (Massachusetts Institute of Technology)

Abstract

Plants prevent photodamage under high light by dissipating excess energy as heat. Conformational changes of the photosynthetic antenna complexes activate dissipation by leveraging the sensitivity of the photophysics to the protein structure. The mechanisms of dissipation remain debated, largely due to two challenges. First, because of the ultrafast timescales and large energy gaps involved, measurements lacked the temporal or spectral requirements. Second, experiments have been performed in detergent, which can induce non-native conformations, or in vivo, where contributions from homologous antenna complexes cannot be disentangled. Here, we overcome both challenges by applying ultrabroadband two-dimensional electronic spectroscopy to the principal antenna complex, LHCII, in a near-native membrane. Our data provide evidence that the membrane enhances two dissipative pathways, one of which is a previously uncharacterized chlorophyll-to-carotenoid energy transfer. Our results highlight the sensitivity of the photophysics to local environment, which may control the balance between light harvesting and dissipation in vivo.

Suggested Citation

  • Minjung Son & Alberta Pinnola & Samuel C. Gordon & Roberto Bassi & Gabriela S. Schlau-Cohen, 2020. "Observation of dissipative chlorophyll-to-carotenoid energy transfer in light-harvesting complex II in membrane nanodiscs," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15074-6
    DOI: 10.1038/s41467-020-15074-6
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    1. Kulyash Meiramkulova & Zhanar Tanybayeva & Assel Kydyrbekova & Arysgul Turbekova & Serik Aytkhozhin & Serik Zhantasov & Aman Taukenov, 2021. "The Efficiency of LED Irradiation for Cultivating High-Quality Tomato Seedlings," Sustainability, MDPI, vol. 13(16), pages 1-11, August.
    2. Edoardo Cignoni & Margherita Lapillo & Lorenzo Cupellini & Silvia Acosta-GutiƩrrez & Francesco Luigi Gervasio & Benedetta Mennucci, 2021. "A different perspective for nonphotochemical quenching in plant antenna complexes," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    3. Mengyuan Zheng & Xiaojie Pang & Ming Chen & Lijin Tian, 2024. "Ultrafast energy quenching mechanism of LHCSR3-dependent photoprotection in Chlamydomonas," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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