oxygen-evolving complex , OEC (Abkürzung)

The oxygen-evolving complex is the site of water oxidation.

The exact structure of the oxygen-evolving complex has been hard to determine experimentally.

Manganese also functions in the oxygen-evolving complex of photosynthetic plants.

By studying the natural oxygen-evolving complex, researchers have developed catalysts such as the "blue dimer" to mimic its function.

X-ray crystallography studies have recently provided detailed models of the structure of the oxygen-evolving complex and its manganese cluster.

It is used as an irreversible inhibitor of the oxygen-evolving complex of photosynthesis on account of its similar structure to water.

Ultraviolet light causes inhibition of the oxygen-evolving complex before the rest of PSII becomes inhibited.

If the oxygen-evolving complex is chemically inactivated, then the remaining electron transfer activity of PSII becomes very sensitive to light.

Oxygen-evolving complex (OEC)

The activity of the oxygen-evolving complex of PSII is often found to be lost before the rest of the reaction centre loses activity.

A photon absorbed by the manganese ions of the oxygen-evolving complex triggers inactivation of the oxygen-evolving complex.

The oxygen-evolving complex, (OEC) also known as the water-splitting complex, is a water-oxidizing enzyme involved in the photooxidation of water during the light reactions of photosynthesis.

Water oxidation is catalyzed by a manganese-containing cofactor contained in photosystem II known as the oxygen-evolving complex (OEC) or water-splitting complex.

It has been suggested that even in a healthy leaf, the oxygen-evolving complex does not always function in all PSII centers, and those ones are prone to rapid irreversible photoinhibition.

The PSII oxygen-evolving complex (OEC) provides electrons to re-reduce the PSII reaction center and oxidizes 2 water molecules to recover its reduced initial state.

The active site for the oxygen-evolving complex (OEC) of photosystem II (PSII) is a MnOCa centre with several bridging oxo ligands that participate in the oxidation of water to molecular oxygen.

In nature, the oxygen-evolving complex performs this reaction by accumulating reducing equivalents (electrons) in a manganese-calcium cluster within photosystem II (PS II), then delivering them to water molecules, with the resulting production of molecular oxygen and protons:

The oxidation of water is catalyzed in photosystem II by a redox-active structure that contains four manganese ions and a calcium ion; this oxygen-evolving complex binds two water molecules and stores the four oxidizing equivalents that are required to drive the water-oxidizing reaction.

The oxygen-evolving complex (OEC) is a part of photosystem II contained in the thylakoid membranes of chloroplasts; it is responsible for the terminal photooxidation of water during the light reactions of photosynthesis, and has a metalloenzyme core containing four atoms of manganese.