2001•Encyclopedia of Life SciencesRequires access
Photosystem I
Norbert Krauß, Wolfram Saenger
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Abstract
Abstract In oxygenic photosynthesis, the two protein–pigment complexes photosystem I and photosystem II are involved in the light‐driven charge separation across the thylakoid membrane, which results in the oxidation of water to O 2 and in the reduction of NADP + to NADPH. In addition to a photosynthetic reaction centre, each of these photosystems contains a core antenna system. The crystal structure of photosystem I reveals the spatial organization of protein subunits and cofactors.