ArticlePhotosynthesis research2018
Light-driven quinone reduction in heliobacterial membranes.
Article in Photosynthesis research, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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Who cites it
15 citing papers in PubMed, 28 citations in OpenAlex.
- Steady-state P800 oxidation kinetics indicate that heliobacterial phototrophy is light-limited.Photosynthesis research · 2025Article
- Trace gas oxidation sustains energy needs of a thermophilic archaeon at suboptimal temperatures.Nature communications · 2024Article
- What We Are Learning from the Diverse Structures of the Homodimeric Type I Reaction Center-Photosystems of Anoxygenic Phototropic Bacteria.Biomolecules · 2024Review
- Electronic Structures of Radical-Pair-Forming Cofactors in a Heliobacterial Reaction Center.Molecules (Basel, Switzerland) · 2024Article
- Energetic Diversity in the Electron-Transfer Pathways of Type I Photosynthetic Reaction Centers.Biochemistry · 2023Article
- The PshX subunit of the photochemical reaction center from Heliobacterium modesticaldum acts as a low-energy antenna.Photosynthesis research · 2022Article
- Recent advances in the structural diversity of reaction centers.Photosynthesis research · 2021Article
- Deletion of the cytochrome bc complex from Heliobacterium modesticaldum results in viable but non-phototrophic cells.Photosynthesis research · 2021Article
- Differential sensitivity to oxygen among the bacteriochlorophylls g in the type-I reaction centers of Heliobacterium modesticaldum.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2021Article
- Reconstitution of the heliobacterial photochemical reaction center and cytochrome cPhotosynthesis research · 2020Article
- Analysis of the Complete Genome of the Alkaliphilic and Phototrophic FirmicuteMicroorganisms · 2020Article
- Using the Endogenous CRISPR-Cas System ofApplied and environmental microbiology · 2019Article
- Expression and purification of affinity-tagged variants of the photochemical reaction center from Heliobacterium modesticaldum.Photosynthesis research · 2019Article
- A Molecular Biology Tool Kit for the Phototrophic Firmicute Heliobacterium modesticaldum.Applied and environmental microbiology · 2019Article
- Evolution of photosynthetic reaction centers: insights from the structure of the heliobacterial reaction center.Photosynthesis research · 2018Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Photosynthetic reaction centers (RCs) evolved > 3 billion years ago and have diverged into Type II RCs reducing quinones and Type I RCs reducing soluble acceptors via iron-sulfur clusters. Photosystem I (PSI), the exemplar Type I RC, uses modified menaquinones as intermediate electron transfer cofactors, but it has been controversial if the Type I RC of heliobacteria (HbRC) uses its two bound menaquinones in the same way. The sequence of the quinone-binding site in PSI is not conserved in the HbRC, and the recently solved crystal structure of the HbRC does not reveal a quinone in the analogous site. We found that illumination of heliobacterial membranes resulted in reduction of menaquinone to menaquinol, suggesting that the HbRC can perform a function thought restricted to Type II RCs. Experiments on membranes and live cells are consistent with the hypothesis that the HbRC preferentially reduces soluble electron acceptors (e.g., ferredoxins) in low light, but switches to reducing lipophilic quinones in high light, when the soluble acceptor pool becomes full. Thus, the HbRC may represent a functional evolutionary intermediate between PSI and the Type II RCs.
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