ArticlePlant physiology2021
Functional redox links between lumen thiol oxidoreductase1 and serine/threonine-protein kinase STN7.
Article in Plant physiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 15 papers.
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Who cites it
15 citing papers in PubMed.
- Vitamin K in photosynthetic organisms.Planta · 2026Review
- The amino terminus of PetD is essential for cytochrome bNature plants · 2026Article
- Molecular architecture for state transition: insights from structural biology and evolutionary trajectories.Plant & cell physiology · 2025Review
- Review
- Chloroplast acetyltransferase GNAT2 acts as a redox-regulated switch for state transitions in tomato.Molecular horticulture · 2025Article
- Cysteine residues contribute to the regulation of Arabidopsis state transition 7 kinase.FEBS letters · 2025Article
- Identification of PsbS binding proteins inFrontiers in plant science · 2025Article
- Characterization and seasonal variation in biofilms attached to leaves of submerged plant.World journal of microbiology & biotechnology · 2023Article
- Article
- A Simple Sonication Method to Isolate the Chloroplast Lumen inBio-protocol · 2023Article
- Current Insights into the Redox Regulation Network in Plant Chloroplasts.Plant & cell physiology · 2023Review
- Photosystems under high light stress: throwing light on mechanism and adaptation.Photosynthetica · 2023Review
- Article
- ROS production and signalling in chloroplasts: cornerstones and evolving concepts.The Plant journal : for cell and molecular biology · 2022Review
- Dynamic Changes in Protein-Membrane Association for Regulating Photosynthetic Electron Transport.Cells · 2021Review
Corrections and comments
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- Erratum issued
Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In response to changing light quantity and quality, photosynthetic organisms perform state transitions, a process which optimizes photosynthetic yield and mitigates photo-damage. The serine/threonine-protein kinase STN7 phosphorylates the light-harvesting complex of photosystem II (PSII; light-harvesting complex II), which then migrates from PSII to photosystem I (PSI), thereby rebalancing the light excitation energy between the photosystems and restoring the redox poise of the photosynthetic electron transport chain. Two conserved cysteines forming intra- or intermolecular disulfide bonds in the lumenal domain (LD) of STN7 are essential for the kinase activity although it is still unknown how activation of the kinase is regulated. In this study, we show lumen thiol oxidoreductase 1 (LTO1) is co-expressed with STN7 in Arabidopsis (Arabidopsis thaliana) and interacts with the LD of STN7 in vitro and in vivo. LTO1 contains thioredoxin (TRX)-like and vitamin K epoxide reductase domains which are related to the disulfide-bond formation system in bacteria. We further show that the TRX-like domain of LTO1 is able to oxidize the conserved lumenal cysteines of STN7 in vitro. In addition, loss of LTO1 affects the kinase activity of STN7 in Arabidopsis. Based on these results, we propose that LTO1 helps to maintain STN7 in an oxidized active state in state 2 through redox interactions between the lumenal cysteines of STN7 and LTO1.
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