A perspective on the major light-harvesting complex dynamics under the effect of pH, salts, and the photoprotective PsbS protein

The photosynthetic apparatus is a highly modular assembly of large pigment-binding proteins. Complexes called antennae can capture the sunlight and direct it from the periphery of two Photosystems (I, II) to the core reaction centers, where it is converted into chemical energy. The apparatus must co...

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Bibliographic Details
Published in:Photosynthesis research 2023-04, Vol.156 (1), p.163-177
Main Authors: Navakoudis, Eleni, Stergiannakos, Taxiarchis, Daskalakis, Vangelis
Format: Article
Language:English
Subjects:
Antennas (Electronics)
Atoms
Binding proteins
Biochemistry
Biomedical and Life Sciences
Chlorophyll
Energy
Environmental conditions
Force and energy
Hydrogen-Ion Concentration
Life Sciences
Light
Light-harvesting complex
Light-Harvesting Protein Complexes - metabolism
Photosynthesis
Photosynthetic apparatus
Photosystem II
Photosystem II Protein Complex - metabolism
Pigments
Plant Genetics and Genomics
Plant Physiology
Plant Sciences
Polypeptides
Protein binding
Proteins
Reaction centers
Review
Salts
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Summary:The photosynthetic apparatus is a highly modular assembly of large pigment-binding proteins. Complexes called antennae can capture the sunlight and direct it from the periphery of two Photosystems (I, II) to the core reaction centers, where it is converted into chemical energy. The apparatus must cope with the natural light fluctuations that can become detrimental to the viability of the photosynthetic organism. Here we present an atomic scale view of the photoprotective mechanism that is activated on this line of defense by several photosynthetic organisms to avoid overexcitation upon excess illumination. We provide a complete macroscopic to microscopic picture with specific details on the conformations of the major antenna of Photosystem II that could be associated with the switch from the light-harvesting to the photoprotective state. This is achieved by combining insight from both experiments and all-atom simulations from our group and the literature in a perspective article.
ISSN:0166-8595
1573-5079
1573-5079
DOI:10.1007/s11120-022-00935-6