ArticleThe Plant cell2014
Characterization and evolution of tetrameric photosystem I from the thermophilic cyanobacterium Chroococcidiopsis sp TS-821.
Article in The Plant cell, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.
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29 citing papers in PubMed.
- Structural insights into a PSI-ACPI supercomplex from a cryptophyte alga Chroomonas placoidea.Photosynthesis research · 2025Article
- Photoacclimation strategies in cyanobacterial photosynthesis under dynamic light environments: implications in growth, fitness, and biotechnological applications.Frontiers in microbiology · 2025Review
- Photosystem I: A Paradigm for Understanding Biological Environmental Adaptation Mechanisms in Cyanobacteria and Algae.International journal of molecular sciences · 2024Review
- Hypothetical chloroplast reading frame 51 encodes a photosystem I assembly factor in cyanobacteria.The Plant cell · 2024Article
- Structure of a monomeric photosystem I core associated with iron-stress-induced-A proteins from Anabaena sp. PCC 7120.Nature communications · 2023Article
- Small angle neutron scattering and lipidomic analysis of a native, trimeric PSI-SMALP from a thermophilic cyanobacteria.Biochimica et biophysica acta. Bioenergetics · 2022Article
- The influence of electron utilization pathways on photosystem I photochemistry inRSC advances · 2022Article
- Structure of a tetrameric photosystem I from a glaucophyte alga Cyanophora paradoxa.Nature communications · 2022Article
- Changes in supramolecular organization of cyanobacterial thylakoid membrane complexes in response to far-red light photoacclimation.Science advances · 2022Article
- Cryo-EM structure of a tetrameric photosystem I fromPlant communications · 2022Article
- Structure Insights Into Photosystem I Octamer From Cyanobacteria.Frontiers in microbiology · 2022Article
- Article
- Cryo-EM structure of a functional monomeric Photosystem I from Thermosynechococcus elongatus reveals red chlorophyll cluster.Communications biology · 2021Article
- Structural Diversity of Photosystem I and Its Light-Harvesting System in Eukaryotic Algae and Plants.Frontiers in plant science · 2021Review
- Diversity Among Cyanobacterial Photosystem I Oligomers.Frontiers in microbiology · 2021Review
- Structural variability, coordination and adaptation of a native photosynthetic machinery.Nature plants · 2020Article
- Distinct structural modulation of photosystem I and lipid environment stabilizes its tetrameric assembly.Nature plants · 2020Article
- Physiological and evolutionary implications of tetrameric photosystem I in cyanobacteria.Nature plants · 2019Article
- Structure of a cyanobacterial photosystem I tetramer revealed by cryo-electron microscopy.Nature communications · 2019Article
- Non-detergent isolation of a cyanobacterial photosystem I using styrene maleic acid alternating copolymers.RSC advances · 2019Article
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4 authors.
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Abstract
Photosystem I (PSI) is a reaction center associated with oxygenic photosynthesis. Unlike the monomeric reaction centers in green and purple bacteria, PSI forms trimeric complexes in most cyanobacteria with a 3-fold rotational symmetry that is primarily stabilized via adjacent PsaL subunits; however, in plants/algae, PSI is monomeric. In this study, we discovered a tetrameric form of PSI in the thermophilic cyanobacterium Chroococcidiopsis sp TS-821 (TS-821). In TS-821, PSI forms tetrameric and dimeric species. We investigated these species by Blue Native PAGE, Suc density gradient centrifugation, 77K fluorescence, circular dichroism, and single-particle analysis. Transmission electron microscopy analysis of native membranes confirms the presence of the tetrameric PSI structure prior to detergent solubilization. To investigate why TS-821 forms tetramers instead of trimers, we cloned and analyzed its psaL gene. Interestingly, this gene product contains a short insert between the second and third predicted transmembrane helices. Phylogenetic analysis based on PsaL protein sequences shows that TS-821 is closely related to heterocyst-forming cyanobacteria, some of which also have a tetrameric form of PSI. These results are discussed in light of chloroplast evolution, and we propose that PSI evolved stepwise from a trimeric form to tetrameric oligomer en route to becoming monomeric in plants/algae.
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