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1s5l
From Proteopedia
Architecture of the photosynthetic oxygen evolving center
Photosynthesis uses light energy to drive the oxidation of water at an oxygen-evolving catalytic site within photosystem II (PSII). We report the structure of PSII of the cyanobacterium Thermosynechococcus elongatus at 3.5 angstrom resolution. We have assigned most of the amino acid residues of this 650-kilodalton dimeric multisubunit complex and refined the structure to reveal its molecular architecture. Consequently, we are able to describe details of the binding sites for cofactors and propose a structure of the oxygen-evolving center (OEC). The data strongly suggest that the OEC contains a cubane-like Mn3CaO4 cluster linked to a fourth Mn by a mono-micro-oxo bridge. The details of the surrounding coordination sphere of the metal cluster and the implications for a possible oxygen-evolving mechanism are discussed.
Architecture of the photosynthetic oxygen-evolving center., Ferreira KN, Iverson TM, Maghlaoui K, Barber J, Iwata S, Science. 2004 Mar 19;303(5665):1831-8. Epub 2004 Feb 5. PMID:14764885
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
1S5L is a 38 chains structure with sequences from Thermosynechococcus elongatus. The November 2004 RCSB PDB Molecule of the Month feature on Photosystem II by David S. Goodsell is 10.2210/rcsb_pdb/mom_2004_11. Full crystallographic information is available from OCA.
Reference
- Ferreira KN, Iverson TM, Maghlaoui K, Barber J, Iwata S. Architecture of the photosynthetic oxygen-evolving center. Science. 2004 Mar 19;303(5665):1831-8. Epub 2004 Feb 5. PMID:14764885 doi:10.1126/science.1093087
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