ArticleCommunications biology2024
Eustigmatophyte model of red-shifted chlorophyll a absorption in light-harvesting complexes.
Article in Communications biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- A design principle for tuning far-red absorption of chlorophyll a in light-harvesting complexes.Communications chemistry · 2026Article
- Photosynthesis under far-red light-evolutionary adaptations and bioengineering of light-harvesting complexes.FEBS letters · 2026Review
- Exciton Delocalization Promotes Far-Red Absorption in a Tetrameric ChlorophyllJournal of the American Chemical Society · 2025Article
- Previously unrecognized diversity of far-red light-using terrestrial green algae and cyanobacteria.iScience · 2025Article
- Kinetics of Chlorophyll Degradation in Japanese Maple (Life (Basel, Switzerland) · 2025Article
- Far-Red Absorbing LHCII Incorporating ChlorophyllThe journal of physical chemistry letters · 2025Article
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Authors and funding
7 authors.
Funding
Abstract
Photosynthetic organisms harvest light for energy. Some eukaryotic algae have specialized in harvesting far-red light by tuning chlorophyll a absorption through a mechanism still to be elucidated. Here, we combined optically detected magnetic resonance and pulsed electron paramagnetic resonance measurements on red-adapted light-harvesting complexes, rVCP, isolated from the freshwater eustigmatophyte alga Trachydiscus minutus to identify the location of the pigments responsible for this remarkable adaptation. The pigments have been found to belong to an excitonic cluster of chlorophylls a at the core of the complex, close to the central carotenoids in L1/L2 sites. A pair of structural features of the Chl a403/a603 binding site, namely the histidine-to-asparagine substitution in the magnesium-ligation residue and the small size of the amino acid at the i-4 position, resulting in a [A/G]xxxN motif, are proposed to be the origin of this trait. Phylogenetic analysis of various eukaryotic red antennae identified several potential LHCs that could share this tuning mechanism. This knowledge of the red light acclimation mechanism in algae is a step towards rational design of algal strains in order to enhance light capture and efficiency in large-scale biotechnology applications.
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