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 …
cyanobacteria underpins the energy conversion processes that sustain most life on our …
Protein motifs for proton transfers that build the transmembrane proton gradient
Biological membranes are barriers to polar molecules, so membrane embedded proteins
control the transfers between cellular compartments. Protein controlled transport moves …
control the transfers between cellular compartments. Protein controlled transport moves …
[HTML][HTML] The low spin-high spin equilibrium in the S2-state of the water oxidizing enzyme
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 …
five sequential oxidation states (S 0 to S 4) before water is oxidized and O 2 is generated …
O2 evolution and recovery of the water-oxidizing enzyme
K Kawashima, T Takaoka, H Kimura, K Saito… - Nature …, 2018 - nature.com
In photosystem II, light-induced water oxidation occurs at the Mn4CaO5 cluster. Here we
demonstrate proton releases, dioxygen formation, and substrate water incorporation in …
demonstrate proton releases, dioxygen formation, and substrate water incorporation in …
Binding and functions of the two chloride ions in the oxygen-evolving center of photosystem II
K Imaizumi, K Ifuku - Photosynthesis Research, 2022 - Springer
Light-driven water oxidation in photosynthesis occurs at the oxygen-evolving center (OEC)
of photosystem II (PSII). Chloride ions (Cl−) are essential for oxygen evolution by PSII, and …
of photosystem II (PSII). Chloride ions (Cl−) are essential for oxygen evolution by PSII, and …
Proton transfer pathway from the oxygen-evolving complex in photosystem II substantiated by extensive mutagenesis
H Kuroda, K Kawashima, K Ueda, T Ikeda… - … et Biophysica Acta (BBA …, 2021 - Elsevier
We report a structure-based biological approach to identify the proton-transfer pathway in
photosystem II. First, molecular dynamics (MD) simulations were conducted to analyze the H …
photosystem II. First, molecular dynamics (MD) simulations were conducted to analyze the H …
Occupancy Analysis of Water Molecules inside Channels within 25 Å Radius of the Oxygen-Evolving Center of Photosystem II in Molecular Dynamics Simulations
At room temperature and neutral pH, the oxygen-evolving center (OEC) of photosystem II
(PSII) catalyzes water oxidation. During this process, oxygen is released from the OEC …
(PSII) catalyzes water oxidation. During this process, oxygen is released from the OEC …
Redox potential of the oxygen-evolving complex in the electron transfer cascade of photosystem II
In photosystem II (PSII), water oxidation occurs in the Mn4CaO5 cluster with the release of
electrons via the redox-active tyrosine (TyrZ) to the reaction-center chlorophylls (PD1/PD2) …
electrons via the redox-active tyrosine (TyrZ) to the reaction-center chlorophylls (PD1/PD2) …
Requirement of chloride for the downhill electron transfer pathway from the water-splitting center in natural photosynthesis
In photosystem II (PSII), Cl–is a prerequisite for the second flash-induced oxidation of the
Mn4CaO5 cluster (the S2 to S3 transition). We report proton transfer from the substrate water …
Mn4CaO5 cluster (the S2 to S3 transition). We report proton transfer from the substrate water …
Protonation structure of the closed-cubane conformation of the O2-evolving complex in photosystem II
In photosystem II (PSII), one-electron oxidation of the most stable state of the oxygen-
evolving Mn4CaO5 cluster (S1) leads to the S2 state formation, Mn1 (III) Mn2 (IV) Mn3 (IV) …
evolving Mn4CaO5 cluster (S1) leads to the S2 state formation, Mn1 (III) Mn2 (IV) Mn3 (IV) …