Photosynthetic water oxidation: towards a mechanism
نویسندگان
چکیده
منابع مشابه
The inorganic biochemistry of photosynthetic water oxidation.
This enzyme, called the photosynthetic water oxidation complex (WOC), liberates protons and electrons needed for energy production and reduction of NADP’ and quinones that are essential for plant growth. The 0, formed in Equation 1 is not essential for plant survival, but is essential for other organisms on Earth, since it is by far the major source of global OL production for the atmosphere. T...
متن کاملExtended protein/water H-bond networks in photosynthetic water oxidation.
Oxidation of water molecules in the photosystem II (PSII) protein complex proceeds at the manganese-calcium complex, which is buried deeply in the lumenal part of PSII. Understanding the PSII function requires knowledge of the intricate coupling between the water-oxidation chemistry and the dynamic proton management by the PSII protein matrix. Here we assess the structural basis for long-distan...
متن کاملPhotosynthetic water oxidation: a simplex-scheme of its partial reactions
Photosynthesis of green plants, algae and cyanobacteria is powered by sunlight. It uses water as ultimate donor of electrons for the reduction of CO2 to yield carbohydrates. Photosystem II (PS II), a water^ plastoquinone oxidoreductase, is the key enzyme of oxygenic photosynthesis. It is an integral protein of the thylakoid membrane. PS II is functionally bipartite, its photosynthetic reaction ...
متن کاملFourier transform infrared difference spectroscopy for studying the molecular mechanism of photosynthetic water oxidation
The photosystem II reaction center mediates the light-induced transfer of electrons from water to plastoquinone, with concomitant production of O2. Water oxidation chemistry occurs in the oxygen-evolving complex (OEC), which consists of an inorganic Mn4CaO5 cluster and its surrounding protein matrix. Light-induced Fourier transform infrared (FTIR) difference spectroscopy has been successfully u...
متن کاملAlternating electron and proton transfer steps in photosynthetic water oxidation.
Water oxidation by cyanobacteria, algae, and plants is pivotal in oxygenic photosynthesis, the process that powers life on Earth, and is the paradigm for engineering solar fuel-production systems. Each complete reaction cycle of photosynthetic water oxidation requires the removal of four electrons and four protons from the catalytic site, a manganese-calcium complex and its protein environment ...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Bioenergetics
سال: 2001
ISSN: 0005-2728
DOI: 10.1016/s0005-2728(00)00223-1