The manganese complex of photosystem II in its reaction cycle—basic framework and possible realization at the atomic level

H Dau, M Haumann - Coordination Chemistry Reviews, 2008 - Elsevier
Photosynthetic water oxidation proceeds at a pentanuclear Mn4Ca complex bound to amino
acid residues in the interior of photosystem II (PSII). It involves the binding of two water …

[HTML][HTML] Eight steps preceding O–O bond formation in oxygenic photosynthesis—a basic reaction cycle of the photosystem II manganese complex

H Dau, M Haumann - Biochimica et Biophysica Acta (BBA)-Bioenergetics, 2007 - Elsevier
In oxygenic photosynthesis, water is split at a Mn4Ca complex bound to the proteins of
photosystem II (PSII). Powered by four quanta of visible light, four electrons and four protons …

Two Interconvertible Structures that Explain the Spectroscopic Properties of the Oxygen‐Evolving Complex of Photosystem II in the S2 State

DA Pantazis, W Ames, N Cox, W Lubitz… - Angewandte Chemie …, 2012 - Wiley Online Library
Nature s water oxidizing catalyst, the oxygen evolving complex (OEC) of photosystemII
(PSII), generates protons, electrons, and molecular oxygen from water and solar energy …

Missing pieces in the puzzle of biological water oxidation

DA Pantazis - ACS Catalysis, 2018 - ACS Publications
The sunlight-powered oxidation of water by photosystem II (PSII) of algae, plants, and
cyanobacteria underpins the energy conversion processes that sustain most life on our …

A five-coordinate Mn (IV) intermediate in biological water oxidation: spectroscopic signature and a pivot mechanism for water binding

M Retegan, V Krewald, F Mamedov, F Neese… - Chemical …, 2016 - pubs.rsc.org
Among the four photo-driven transitions of the water-oxidizing tetramanganese–calcium
cofactor of biological photosynthesis, the second-last step of the catalytic cycle, that is the S2 …

55Mn ENDOR of the S2-State Multiline EPR Signal of Photosystem II:  Implications on the Structure of the Tetranuclear Mn Cluster

JM Peloquin, KA Campbell, DW Randall… - Journal of the …, 2000 - ACS Publications
We have performed continuous-wave electron paramagnetic resonance (CW-EPR) and
electron spin echo electron nuclear double resonance (ESE-ENDOR) experiments on the …

The S2 State of the Oxygen‐Evolving Complex of Photosystem II Explored by QM/MM Dynamics: Spin Surfaces and Metastable States Suggest a Reaction Path Towards the S …

D Bovi, D Narzi, L Guidoni - Angewandte Chemie International …, 2013 - Wiley Online Library
Split and polish: Quantum mechanics/molecular mechanics simulations reveal the role of
spin surfaces, kinetics, and thermodynamics on the interconversion between two structural …

[HTML][HTML] The low spin-high spin equilibrium in the S2-state of the water oxidizing enzyme

A Boussac, I Ugur, A Marion, M Sugiura… - … et Biophysica Acta (BBA …, 2018 - Elsevier
Abstract In Photosystem II (PSII), the Mn 4 CaO 5-cluster of the active site advances through
five sequential oxidation states (S 0 to S 4) before water is oxidized and O 2 is generated …

[HTML][HTML] EPR/ENDOR characterization of the physical and electronic structure of the OEC Mn cluster

JM Peloquin, RD Britt - Biochimica et Biophysica Acta (BBA)-Bioenergetics, 2001 - Elsevier
Electron paramagnetic resonance (EPR) spectroscopy has often played a crucial role in
characterizing the various cofactors and processes of photosynthesis, and photosystem II …

Spin state as a marker for the structural evolution of nature's water-splitting catalyst

V Krewald, M Retegan, F Neese, W Lubitz… - Inorganic …, 2016 - ACS Publications
In transition-metal complexes, the geometric structure is intimately connected with the spin
state arising from magnetic coupling between the paramagnetic ions. The tetramanganese …