20 Result(s)
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Article
Open AccessOn the simulation and interpretation of substrate-water exchange experiments in photosynthetic water oxidation
Water oxidation by photosystem II (PSII) sustains most life on Earth, but the molecular mechanism of this unique process remains controversial. The ongoing identification of the binding sites and modes of the ...
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Article
Open AccessEvolutionary diversity of proton and water channels on the oxidizing side of photosystem II and their relevance to function
One of the reasons for the high efficiency and selectivity of biological catalysts arise from their ability to control the pathways of substrates and products using protein channels, and by modulating the tran...
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Article
Open AccessSolar energy conversion by photosystem II: principles and structures
Photosynthetic water oxidation by Photosystem II (PSII) is a fascinating process because it sustains life on Earth and serves as a blue print for scalable synthetic catalysts required for renewable energy appl...
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Open AccessThomas John Wydrzynski (8 July 1947–16 March 2018)
With this Tribute, we remember and honor Thomas John (Tom) Wydrzynski. Tom was a highly innovative, independent and committed researcher, who had, early in his career, defined his life-long research goal. He w...
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Open AccessUnequal misses during the flash-induced advancement of photosystem II: effects of the S state and acceptor side cycles
Photosynthetic water oxidation is catalyzed by the oxygen-evolving complex (OEC) in photosystem II (PSII). This process is energetically driven by light-induced charge separation in the reaction center of PSII...
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Article
Gernot Renger (1937–2013): his life, Max-Volmer Laboratory, and photosynthesis research
Gernot Renger (October 23, 1937–January 12, 2013), one of the leading biophysicists in the field of photosynthesis research, studied and worked at the Max-Volmer-Institute (MVI) of the Technische Universität B...
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Warwick Hillier: a tribute
Warwick Hillier (October 18, 1967–January 10, 2014) made seminal contributions to our understanding of photosynthetic water oxidation employing membrane inlet mass spectrometry and FTIR spectroscopy. This arti...
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Efficiency of photosynthetic water oxidation at ambient and depleted levels of inorganic carbon
Over 40 years ago, Joliot et al. (Photochem Photobiol 10:309–329, 1969) designed and employed an elegant and highly sensitive electrochemical technique capable of measuring O2 evolved by photosystem II (PSII) in ...
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Agu Laisk, Ladislav Nedbal, and Govindjee (eds): Photosynthesis in silico. Understanding complexity from molecules to ecosystems
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Article
Special educational issue on ‘Basics and application of biophysical techniques in photosynthesis and related processes’—Part B
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Article
Open AccessOn-line mass spectrometry: membrane inlet sampling
Significant insights into plant photosynthesis and respiration have been achieved using membrane inlet mass spectrometry (MIMS) for the analysis of stable isotope distribution of gases. The MIMS approach is ba...
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Special educational issue on ‘Basics and application of biophysical techniques in photosynthesis and related processes’
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Article
Open AccessEffects of methanol on the S i -state transitions in photosynthetic water-splitting
From a chemical point of view methanol is one of the closest analogues of water. Consistent with this idea EPR spectroscopy studies have shown that methanol binds at—or at least very close to—the Mn4O ...
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Mass Spectrometry-Based Methods for Studying Kinetics and Dynamics in Biological Systems
In recent years, mass spectrometry (MS) has become one of the most widely used analytical techniques. MS allows studies on compounds ranging in size from single atoms to mega-Dalton biomolecular assemblies. Th...
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Article
Interactions of photosystem II with bicarbonate, formate and acetate
In this study, we probe the effects of bicarbonate (hydrogencarbonate), BC, removal from photosystem II in spinach thylakoids by measuring flash-induced oxygen evolution patterns (FIOPs) with a Joliot-type ele...
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Article
Pulse EPR, 55Mn-ENDOR and ELDOR-detected NMR of the S2-state of the oxygen evolving complex in Photosystem II
Pulse EPR, 55Mn-ENDOR and ELDOR-detected NMR experiments were performed on the S2-state of the oxygen-evolving complex from spinach Photosystem II. The novel technique of random acquisition in ENDOR was used to s...
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Chapter
Mechanism of Photosynthetic Oxygen Production
This chapter deals with the mechanism of photosynthetic water oxidation that leads to O2 formation in Photosystem II (PS II). After a brief introduction to the structure and function of the PS II complex, the S-s...
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Refined Model of the Oxidation States and Structures of the Mn/Ca/Cl Cluster of the Oxygen Evolving Complex of Photosystem II
Central to the problem of photosynthetic oxygen evolution is the structure and function of the Mn/Ca/Cl complex that appears to be the locus of charge accumulation and water splitting. In the recent past our g...
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Chapter
Substrate Water 18O Exchange Kinetics in the S2 State of Photosystem II
The oxidation of water into molecular oxygen during photosynthesis is catalyzed by a subdomain of photosystem II (PSII) termed the water oxidizing complex (WOC). Contained within the WOC is a redox-active Mn/t...
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Calcium and Chloride Cofactors of the Oxygen Evolving Complex - X-Ray Absorption Spectroscopy Evidence for A Mn/Ca/Cl Heteronuclear Cluster
The oxygen-evolving complex (OEC) of photosystem II (PSII) in green plants and algae contains a cluster of four Mn atoms in the active site, which catalyzes the oxidation of water to dioxygen. Along with Mn, Cl− ...
