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https://hdl.handle.net/20.500.14279/24311
Title: | Robust Strategy for Photoprotection in the Light-Harvesting Antenna of Diatoms: A Molecular Dynamics Study | Authors: | Chrysafoudi, Anthi Maity, Sayan Kleinekathöfer, Ulrich Daskalakis, Vangelis |
Major Field of Science: | Natural Sciences | Field Category: | Chemical Sciences | Keywords: | Chlorophyll Binding Proteins;Diatoms;Molecular Dynamics Simulation;Protein Conformation;FCP protein | Issue Date: | 7-Oct-2021 | Source: | Journal of Physical Chemistry Letters, 2021, vol. 12, no. 39, pp. 9626-9633 | Volume: | 12 | Issue: | 39 | Start page: | 9626 | End page: | 9633 | Journal: | Journal of Physical Chemistry Letters | Abstract: | Diatoms generate a large portion of the oxygen produced on earth due to their exceptional light-harvesting properties involving fucoxanthin and chlorophyll-binding proteins (FCP). At the same time, an efficient adaptation of these complexes to fluctuating light conditions is necessary to protect the diatoms against photodamage. So far, structural and dynamic data for the interaction between FCP and the photoprotective LHCX family of proteins in diatoms are lacking. In this computational study, we provide a structural basis for a remarkable pH-dependent adaptation at the molecular level. Upon binding of the LHCX1 protein to the FCP complex together with a change in pH, conformational changes within the FCP protein result in a variation of the electronic coupling in a specific chlorophyll-fucoxanthin pair, leading to a change in the exciton transfer rate by almost an order of magnitude. A common strategy for photoprotection between diatoms and higher plants is identified and discussed. | URI: | https://hdl.handle.net/20.500.14279/24311 | ISSN: | 19487185 | DOI: | 10.1021/acs.jpclett.1c02498 | Rights: | © American Chemical Society | Type: | Article | Affiliation : | University of Crete Jacobs University Bremen Cyprus University of Technology |
Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
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