ArticleProceedings of the National Academy of Sciences of the United States of America2008
Photosynthetic water oxidation at elevated dioxygen partial pressure monitored by time-resolved X-ray absorption measurements.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed, 62 citations in OpenAlex.
- Time-resolved Mn KThe Journal of biological chemistry · 2026Article
- The Low Oxidation State Paradigm is More Consistent with XFEL Observations of the S₃ → [S₄] → S₀ Transition in Photosystem II.Chemistry (Weinheim an der Bergstrasse, Germany) · 2025Article
- Insights into PSII's SThe journal of physical chemistry letters · 2024Article
- Solar energy conversion by photosystem II: principles and structures.Photosynthesis research · 2023Review
- Molecular basis for turnover inefficiencies (misses) during water oxidation in photosystem II.Chemical science · 2022Article
- Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence.Frontiers in plant science · 2019Article
- Studying the oxidation of water to molecular oxygen in photosynthetic and artificial systems by time-resolved membrane-inlet mass spectrometry.Frontiers in plant science · 2013Review
- Misses during water oxidation in photosystem II are S state-dependent.The Journal of biological chemistry · 2012Article
- Photosynthetic water oxidation vs. mitochondrial oxygen reduction: distinct mechanistic parallels.Journal of bioenergetics and biomembranes · 2011Review
- Thermodynamic limitations of photosynthetic water oxidation at high proton concentrations.The Journal of biological chemistry · 2011Article
- Membrane-inlet mass spectrometry reveals a high driving force for oxygen production by photosystem II.Proceedings of the National Academy of Sciences of the United States of America · 2011Article
- Carboxylate shifts steer interquinone electron transfer in photosynthesis.The Journal of biological chemistry · 2011Article
- Adventures with cyanobacteria: a personal perspective.Frontiers in plant science · 2011Article
- Time-resolved structural studies of protein reaction dynamics: a smorgasbord of X-ray approaches.Acta crystallographica. Section A, Foundations of crystallography · 2010Article
- Rapid evolution of the Photosystem II electronic structure during water splitting.Physical review. XArticle
- Analysis of xenon binding to photosystem II by X-ray crystallography.Photosynthesis researchArticle
- Energetics and kinetics of photosynthetic water oxidation studied by photothermal beam deflection (PBD) experiments.Photosynthesis researchArticle
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
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Abstract
The atmospheric dioxygen (O(2)) is produced at a tetramanganese complex bound to the proteins of photosystem II (PSII). To investigate product inhibition at elevated oxygen partial pressure (pO(2) ranging from 0.2 to 16 bar), we monitored specifically the redox reactions of the Mn complex in its catalytic S-state cycle by rapid-scan and time-resolved X-ray absorption near-edge spectroscopy (XANES) at the Mn K-edge. By using a pressure cell for X-ray measurements after laser-flash excitation of PSII particles, we found a clear pO(2) influence on the redox reactions of the Mn complex, with a similar half-effect pressure as determined (2-3 bar). However, XANES spectra and the time courses of the X-ray fluorescence collected with microsecond resolution suggested that the O(2) evolution transition itself (S(3)-->S(0)+O(2)) was not affected. Additional (nonstandard) oxidation of the Mn complex at high pO(2) explains our experimental findings more readily. Our results suggest that photosynthesis at ambient conditions is not limited by product inhibition of the O(2) formation step.
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