ArticleNature communications2022
Structure of a tetrameric photosystem I from a glaucophyte alga Cyanophora paradoxa.
Article in Nature communications, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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14 citing papers in PubMed, 22 citations in OpenAlex.
- Structural basis of diadinoxanthin-Chl a/b-binding proteins in the photosystem I supercomplex ofScience advances · 2026Article
- Structural study of monomeric and dimeric photosystem I-LHCI supercomplexes from a bryophyte.Communications biology · 2026Article
- Structural insights into a PSI-ACPI supercomplex from a cryptophyte alga Chroomonas placoidea.Photosynthesis research · 2025Article
- Structural insights into the assembly and energy transfer of haptophyte photosystem I-light-harvesting supercomplex.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- The structural basis for light harvesting in organisms producing phycobiliproteins.The Plant cell · 2024Review
- Photosystem I: A Paradigm for Understanding Biological Environmental Adaptation Mechanisms in Cyanobacteria and Algae.International journal of molecular sciences · 2024Review
- Darwin's Green Living Fossil: The MicroalgaMicroorganisms · 2024Article
- Hypothetical chloroplast reading frame 51 encodes a photosystem I assembly factor in cyanobacteria.The Plant cell · 2024Article
- Long-term light adaptation of light-harvesting and energy-transfer processes in the glaucophyte Cyanophora paradoxa under different light conditions.Photosynthesis research · 2024Article
- Isolation and characterization of trimeric and monomeric PSI cores from Acaryochloris marina MBIC11017.Photosynthesis research · 2023Article
- Structural basis and evolution of the photosystem I-light-harvesting supercomplex of cryptophyte algae.The Plant cell · 2023Article
- Biochemical and spectroscopic characterization of PSI-LHCI from the red alga Cyanidium caldarium.Photosynthesis research · 2023Article
- Phycobilisomes and Phycobiliproteins in the Pigment Apparatus of Oxygenic Photosynthetics: From Cyanobacteria to Tertiary Endosymbiosis.International journal of molecular sciences · 2023Review
- CryomicroscopyFaraday discussions · 2022Article
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Authors and funding
11 authors at 5 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Photosystem I (PSI) is one of the two photosystems functioning in light-energy harvesting, transfer, and electron transfer in photosynthesis. However, the oligomerization state of PSI is variable among photosynthetic organisms. We present a 3.8-Å resolution cryo-electron microscopic structure of tetrameric PSI isolated from the glaucophyte alga Cyanophora paradoxa, which reveals differences with PSI from other organisms in subunit composition and organization. The PSI tetramer is organized in a dimer of dimers with a C2 symmetry. Unlike cyanobacterial PSI tetramers, two of the four monomers are rotated around 90°, resulting in a completely different pattern of monomer-monomer interactions. Excitation-energy transfer among chlorophylls differs significantly between Cyanophora and cyanobacterial PSI tetramers. These structural and spectroscopic features reveal characteristic interactions and excitation-energy transfer in the Cyanophora PSI tetramer, suggesting that the Cyanophora PSI could represent a turning point in the evolution of PSI from prokaryotes to eukaryotes.
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