ArticleThe Journal of biological chemistry2013
A reaction center-dependent photoprotection mechanism in a highly robust photosystem II from an extremophilic red alga, Cyanidioschyzon merolae.
Article in The Journal of biological chemistry, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.
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Who cites it
37 citing papers in PubMed, 65 citations in OpenAlex.
- Excitonic energy transfer in red algal Photosystem I reveals an evolutionary bridge between cyanobacteria and plants.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Sexual life cycle establishes the unicellular red algae Cyanidiophyceae as a genetically tractable model for eukaryotic evolution.The Plant cell · 2026Article
- Resolving the contributions of photosystem II, photosystem I, and phycobilisomes to the in vivo fluorescence yield in the red alga Cyanidioschyzon merolae.Photosynthesis research · 2026Article
- IPTG- and estradiol-inducible gene expression systems in the unicellular red alga Cyanidioschyzon merolae.Plant physiology · 2026Article
- Transcriptomics Reveals an Energy-Saving Metabolic Switch in an Extremophilic Red MicroalgaInternational journal of molecular sciences · 2025Article
- Development of a rapamycin-inducible protein-knockdown system in the unicellular red alga Cyanidioschyzon merolae.Plant physiology · 2024Article
- How Light Modulates the Growth ofCells · 2023Article
- Identification of multiple nonphotochemical quenching processes in the extremophilic red alga Cyanidioschyzon merolae.Photosynthesis research · 2022Article
- A cotransformation system of the unicellular red alga Cyanidioschyzon merolae with blasticidin S deaminase and chloramphenicol acetyltransferase selectable markers.BMC plant biology · 2021Article
- Acclimation of photosynthetic apparatus in the mesophilic red alga Dixoniella giordanoi.Physiologia plantarum · 2021Article
- The Unicellular Red Alga Cyanidioschyzon merolae-The Simplest Model of a Photosynthetic Eukaryote.Plant & cell physiology · 2021Review
- Cryo-EM photosystem I structure reveals adaptation mechanisms to extreme high light in Chlorella ohadii.Nature plants · 2021Article
- Development of a Novel Nanoarchitecture of the Robust Photosystem I from a Volcanic MicroalgaInternational journal of molecular sciences · 2021Article
- Juggling Lightning: How Chlorella ohadii handles extreme energy inputs without damage.Photosynthesis research · 2021Article
- Photosynthesis of the Cyanidioschyzon merolae cells in blue, red, and white light.Photosynthesis research · 2021Article
- Regulation of photosystem I-light-harvesting complex I from a red alga Cyanidioschyzon merolae in response to light intensities.Photosynthesis research · 2020Article
- Article
- Bioengineering of Microalgae: Recent Advances, Perspectives, and Regulatory Challenges for Industrial Application.Frontiers in bioengineering and biotechnology · 2020Review
- Photoprotective strategies in the motile cryptophyte alga Rhodomonas salina-role of non-photochemical quenching, ions, photoinhibition, and cell motility.Folia microbiologica · 2019Article
- The CytochromeThe Plant cell · 2019Article
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Authors and funding
10 authors at 5 institutions in 4 countries.
Funding
Abstract
Members of the rhodophytan order Cyanidiales are unique among phototrophs in their ability to live in extremely low pH levels and moderately high temperatures. The photosynthetic apparatus of the red alga Cyanidioschyzon merolae represents an intermediate type between cyanobacteria and higher plants, suggesting that this alga may provide the evolutionary link between prokaryotic and eukaryotic phototrophs. Although we now have a detailed structural model of photosystem II (PSII) from cyanobacteria at an atomic resolution, no corresponding structure of the eukaryotic PSII complex has been published to date. Here we report the isolation and characterization of a highly active and robust dimeric PSII complex from C. merolae. We show that this complex is highly stable across a range of extreme light, temperature, and pH conditions. By measuring fluorescence quenching properties of the isolated C. merolae PSII complex, we provide the first direct evidence of pH-dependent non-photochemical quenching in the red algal PSII reaction center. This type of quenching, together with high zeaxanthin content, appears to underlie photoprotection mechanisms that are efficiently employed by this robust natural water-splitting complex under excess irradiance. In order to provide structural details of this eukaryotic form of PSII, we have employed electron microscopy and single particle analyses to obtain a 17 Å map of the C. merolae PSII dimer in which we locate the position of the protein mass corresponding to the additional extrinsic protein stabilizing the oxygen-evolving complex, PsbQ'. We conclude that this lumenal subunit is present in the vicinity of the CP43 protein, close to the membrane plane.
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