IMR Press / FBL / Volume 16 / Issue 8 / DOI: 10.2741/3900

Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Open Access Article
Light-induced water oxidation in photosystem II
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1 Institut fur Chemie und Biochemie/Kristallographie, Freie Universitat Berlin, Fabeckstrasse 36a, D-14195 Berlin, Germany
2 MaxVolmer-Laboratorium fur Biophysikalische Chemie, Technische Universitat Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
Academic Editor:Mahir D. Mamedov
Front. Biosci. (Landmark Ed) 2011, 16(8), 3072–3132; https://doi.org/10.2741/3900
Published: 1 June 2011
Abstract

The photosystem II core complex (PSIIcc) is the key enzyme of oxygenic photosynthesis, as it catalyzes the light-induced oxidation of water to form dioxgyen and protons. It is located in the thylakoid membrane of cyanobacteria, algae, and plants and consists of 20 protein subunits binding about 100 cofactors. In this review, we discuss what is presently known about the "donor side" of PSIIcc, covering the photosynthetic reaction center and the water oxidase part. The focus is on the catalytic Mn4Ca cluster and its protein environment. An attempt is made to connect recent crystallographic data (up to 2.9 Å resolution) with the wealth of information about Nature's water oxidation device from spectroscopic, biochemical and theoretical work.

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