The photosynthetic conversion of water to molecular oxygen is catalyzed by the Mn 4 CaO 5
cluster in Photosystem II and provides nearly our entire supply of atmospheric oxygen. The …

In recent years, there has been considerable interest in studies of catalytic metal clusters in
metalloproteins based on density functional theory (DFT) quantum mechanics/molecular …

Photosynthetic water oxidation is catalyzed by a unique Mn4Ca cluster in Photosystem II.
The ligation environment of the Mn4Ca cluster optimizes the cluster's reactivity at each step …

Light-driven oxidation of water to dioxygen in plants, algae, and cyanobacteria is catalyzed
within photosystem II (PS II) by a Mn4Ca cluster. Although the cluster has been studied by …

The photosystem II (PSII) enzyme provides nearly all the oxygen on Earth by catalyzing
water oxidation via its oxygen-evolving complex (OEC), a heterocubane metal cluster in the …

Photosynthetic water oxidation, which provides the electrons necessary for CO 2 reduction
and releases O 2 and protons, is performed at the Mn 4 CaO 5 cluster in photosystem II …

The O2-producing Mn4CaO5 catalyst in photosystem II oxidizes two water molecules
(substrate) to produce one O2 molecule. Considerable evidence supports the identification …

Fourier transform infrared (FTIR) difference spectroscopy is a powerful method to study the
detailed structures of active sites in enzymes. It can detect basically all molecules involved in …

Analyses of the refined X-ray crystallographic structures of photosystem II (PSII) at 2.9− 3.5 Å
have revealed the presence of possible channels for the removal of protons from the …

The annual production of 260 Gtonnes of oxygen, during the process of photosynthesis,
sustains life on earth. Oxygen is produced in the thylakoid membranes of green-plant …