Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
Volume 363, Issue 1494, Pages 1129-1137Publisher
ROYAL SOC
DOI: 10.1098/rstb.2007.2208
Keywords
photosystem II; structure; X-ray diffraction; manganese cluster; models; oxygen-evolving complex
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Funding
- Biotechnology and Biological Sciences Research Council Funding Source: Medline
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The location, structure and protein environment of the Mn4Ca2+ cluster, which catalyses the light-driven, water-splitting reaction of photosystem II, has been revealed by X-ray crystallography. However, owing to the low resolutions of the crystal structures reported to date, and the possibility of radiation damage at the catalytic centre, the precise position of each metal ion remains unknown. To some extent, these problems have been overcome by applying spectroscopic techniques like extended X-ray absorption fine structure. Taking into account the most recent results obtained with these two X-ray-based techniques, we have attempted to refine models of the structure of the Mn4Ca2+ cluster and its protein environment.
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