ArticleJournal of the American Chemical Society2023
How the pH Controls Photoprotection in the Light-Harvesting Complex of Mosses.
Article in Journal of the American Chemical Society, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- LHCSR1 Functions as a Dimmer Switch for Light Harvesting.The journal of physical chemistry letters · 2026Article
- Modeling Xanthophyll Excited States via Cost-Effective Quantum Chemistry methods and Property-Based Diabatization.Journal of chemical theory and computation · 2026Article
- Structural and spectroscopic basis of excitation energy transfer in microbial rhodopsins binding xanthophylls.Chemical science · 2025Article
- Simulations of Excitonic Couplings in Spinach Light-Harvesting Complex II Using a More Realistic Model in the Presence of Photosystem II Core.ACS omega · 2025Article
- Article
- pH-Dependent Assembly and Stability of Toll-Like Receptor 3/dsRNA Signaling Complex: Insights from Constant pH Molecular Dynamics and Metadynamics Simulations.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- Development of artificial photosystems based on designed proteins for mechanistic insights into photosynthesis.Protein science : a publication of the Protein Society · 2024Review
- Multiple retinal isomerizations during the early phase of the bestrhodopsin photoreaction.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Ultrafast excited-state dynamics of Luteins in the major light-harvesting complex LHCII.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2024Article
- Basking in the sun: how mosses photosynthesise and survive in Antarctica.Photosynthesis research · 2023Review
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In response to varying light conditions, light-harvesting complexes (LHCs) switch from a light-harvesting state to a quenched state to protect the photosynthetic organism from excessive light irradiation in a strategy known as nonphotochemical quenching (NPQ). NPQ is activated by an acidification of the thylakoid lumen, which is sensed directly or indirectly by the LHC, resulting in a conformational change of the complex that leads to the quenched state. The conformational changes responsible for NPQ activation and their connection to specific quenching mechanisms are still unknown. Here, we investigate the pH-triggered conformational changes in the light-harvesting complex stress-related (LHCSR) of mosses. By combining constant-pH molecular dynamics and enhanced sampling techniques, we find that the pH sensitivity of the complex is driven by the coupled protonation of three residues modulating the conformation of the short amphipathic helix placed at the lumen side of the embedding membrane. Combining these results with quantum mechanics/molecular mechanics calculations, we show that the quenching mechanism sensitive to the pH goes through a charge-transfer between a carotenoid and an excited chlorophyll, which is controlled by the protein conformation.
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