ArticlePhotosynthesis research2023
The location of the low-energy states in Lhca1 favors excitation energy transfer to the core in the plant PSI-LHCI supercomplex.
Article in Photosynthesis research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed.
- Article
- Article
- Exciton structure of LHCII antenna revisited: complex time-dependent Redfield approach.Photosynthesis research · 2026Article
- Cryo-EM structure of a photosystem I supercomplex from Euglena gracilis containing pentameric LHCE and dimeric LHCII.Nature communications · 2026Article
- Photosynthesis under far-red light-evolutionary adaptations and bioengineering of light-harvesting complexes.FEBS letters · 2026Review
- Transcriptome Profiling of Spike Development Reveals Key Genes and Pathways Associated with Early Heading in Wheat-Plants (Basel, Switzerland) · 2025Article
- Light has a principal role in the Arabidopsis transcriptomic response to the spaceflight environment.NPJ microgravity · 2024Article
- Structure of the red-shifted Fittonia albivenis photosystem I.Nature communications · 2024Article
- Changes in Phytohormones and Transcriptomic Reprogramming in Strawberry Leaves under Different Light Qualities.International journal of molecular sciences · 2024Article
- Environment-dependent chlorophyll-chlorophyll charge transfer states in Lhca4 pigment-protein complex.Frontiers in plant science · 2024Article
- Resonant vibrations produce quantum bridge over high-energy states in heterogeneous antenna.Photosynthesis research · 2023Article
- Integrative Analysis of Transcriptome, Proteome, and Phosphoproteome Reveals Potential Roles of Photosynthesis Antenna Proteins in Response to Brassinosteroids Signaling in Maize.Plants (Basel, Switzerland) · 2023Article
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2 authors.
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Abstract
Lhca1 is one of the four pigment-protein complexes composing the outer antenna of plant Photosystem I-light-havesting I supercomplex (PSI-LHCI). It forms a functional dimer with Lhca4 but, differently from this complex, it does not contain 'red-forms,' i.e., pigments absorbing above 700 nm. Interestingly, the recent PSI-LHCI structures suggest that Lhca1 is the main point of delivering the energy harvested by the antenna to the core. To identify the excitation energy pathways in Lhca1, we developed a structure-based exciton model based on the simultaneous fit of the low-temperature absorption, linear dichroism, and fluorescence spectra of wild-type Lhca1 and two mutants, lacking chlorophylls contributing to the long-wavelength region of the absorption. The model enables us to define the locations of the lowest energy pigments in Lhca1 and estimate pathways and timescales of energy transfer within the complex and to the PSI core. We found that Lhca1 has a particular energy landscape with an unusual (compared to Lhca4, LHCII, and CP29) configuration of the low-energy states. Remarkably, these states are located near the core, facilitating direct energy transfer to it. Moreover, the low-energy states of Lhca1 are also coupled to the red-most state (red forms) of the neighboring Lhca4 antenna, providing a pathway for effective excitation energy transfer from Lhca4 to the core.
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