ArticleProceedings of the National Academy of Sciences of the United States of America2011
Redox potentials of primary electron acceptor quinone molecule (QA)- and conserved energetics of photosystem II in cyanobacteria with chlorophyll a and chlorophyll d.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
41 citing papers in PubMed, 93 citations in OpenAlex.
- Far-red chlorophyll d clusters extend photosystem I absorption toward the red limit.Science advances · 2026Article
- Acclimation to white light in a far-red light specialist: insights from Acaryochloris marina MBIC11017.The New phytologist · 2025Article
- Non-linear frequency-doubling up-conversion in sulfide minerals enables deep-sea oxygenic photosynthesis.National science review · 2025Article
- Physical properties of chlorophyll-quinone conjugates prepared via Friedel-Crafts reaction.Photosynthesis research · 2025Article
- Biotechnological Applications of Cyanobacteria: Synechocystis and Synechococcus Strains.Advances in biochemical engineering/biotechnology · 2025Review
- Chlorophyll triplet states in thylakoid membranes of Acaryochloris marina. Evidence for a triplet state sitting on the photosystem I primary donor populated by intersystem crossing.Photosynthesis research · 2024Article
- Structure of a unique PSII-Pcb tetrameric megacomplex in a chlorophyllScience advances · 2024Article
- Macromolecular conformational changes in photosystem II: interaction between structure and function.Biophysical reviews · 2022Review
- Impact of energy limitations on function and resilience in long-wavelength Photosystem II.eLife · 2022Article
- Redox properties and regulatory mechanism of the iron-quinone electron acceptor in photosystem II as revealed by FTIR spectroelectrochemistry.Photosynthesis research · 2022Review
- Exploitation of Hetero- and Phototrophic Metabolic Modules for Redox-Intensive Whole-Cell Biocatalysis.Frontiers in bioengineering and biotechnology · 2022Review
- Electron transport in Tradescantia leaves acclimated to high and low light: thermoluminescence, PAM-fluorometry, and EPR studies.Photosynthesis research · 2020Article
- Model quantification of the light-induced thylakoid membrane processes in Synechocystis sp. PCC 6803 in vivo and after exposure to radioactive irradiation.Photosynthesis research · 2020Article
- The Main Structural and Functional Characteristics of Photosystem-II-Enriched Membranes Isolated from Wild Type andLife (Basel, Switzerland) · 2020Article
- Oxygen and ROS in Photosynthesis.Plants (Basel, Switzerland) · 2020Review
- Hydrogen Peroxide and Superoxide Anion Radical Photoproduction in PSII Preparations at Various Modifications of the Water-Oxidizing Complex.Plants (Basel, Switzerland) · 2019Article
- Hydroxyectoine protects Mn-depleted photosystem II against photoinhibition acting as a source of electrons.Photosynthesis research · 2019Article
- Photosynthesis supported by a chlorophyll f-dependent, entropy-driven uphill energy transfer in Halomicronema hongdechloris cells adapted to far-red light.Photosynthesis research · 2019Article
- Unequal misses during the flash-induced advancement of photosystem II: effects of the S state and acceptor side cycles.Photosynthesis research · 2019Article
- Biophotovoltaics: Green Power Generation From Sunlight and Water.Frontiers in microbiology · 2019Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In a previous study, we measured the redox potential of the primary electron acceptor pheophytin (Phe) a of photosystem (PS) II in the chlorophyll d-dominated cyanobacterium Acaryochloris marina and a chlorophyll a-containing cyanobacterium, Synechocystis. We obtained the midpoint redox potential (E(m)) values of -478 mV for A. marina and -536 mV for Synechocystis. In this study, we measured the redox potentials of the primary electron acceptor quinone molecule (Q(A)), i.e., E(m)(Q(A)/Q(A)(-)), of PS II and the energy difference between [P680·Phe a(-)·Q(A)] and [P680·Phe a·Q(A)(-)], i.e., ΔG(PhQ). The E(m)(Q(A)/Q(A)(-)) of A. marina was determined to be +64 mV without the Mn cluster and was estimated to be -66 to -86 mV with a Mn-depletion shift (130-150 mV), as observed with other organisms. The E(m)(Phe a/Phe a(-)) in Synechocystis was measured to be -525 mV with the Mn cluster, which is consistent with our previous report. The Mn-depleted downshift of the potential was measured to be approximately -77 mV in Synechocystis, and this value was applied to A. marina (-478 mV); the E(m)(Phe a/Phe a(-)) was estimated to be approximately -401 mV. These values gave rise to a ΔG(PhQ) of -325 mV for A. marina and -383 mV for Synechocystis. In the two cyanobacteria, the energetics in PS II were conserved, even though the potentials of Q(A)(-) and Phe a(-) were relatively shifted depending on the special pair, indicating a common strategy for electron transfer in oxygenic photosynthetic organisms.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.