title: Biological water-oxidizing complex: a nano-sized manganese-calcium oxide in a protein environment.
abstract: The resolution of Photosystem II (PS II) crystals has been improved using isolated PS II from the thermophilic cyanobacterium Thermosynechococcus vulcanus. The new 1.9 Å resolution data have provided detailed information on the structure of the water-oxidizing complex (Umena et al. Nature 473: 55-61, 2011). The atomic level structure of the manganese-calcium cluster is important for understanding the mechanism of water oxidation and to design an efficient catalyst for water oxidation in artificial photosynthetic systems. Here, we have briefly reviewed our knowledge of the structure and function of the cluster.
authors.affiliation: Department of Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran. mmnajafpour@iasbs.ac.ir
authors.forename: Mohammad Mahdi
authors.initials: MM
authors.lastname: Najafpour
authors.forename: Atefeh Nemati
authors.initials: AN
authors.lastname: Moghaddam
authors.forename: Young Nam
authors.initials: YN
authors.lastname: Yang
authors.forename: Eva-Mari
authors.initials: EM
authors.lastname: Aro
authors.forename: Robert
authors.initials: R
authors.lastname: Carpentier
authors.forename: Julian J
authors.initials: JJ
authors.lastname: Eaton-Rye
authors.forename: Choon-Hwan
authors.initials: CH
authors.lastname: Lee
authors.forename: Suleyman I
authors.initials: SI
authors.lastname: Allakhverdiev
mesh_terms: D002118:Calcium / Q000737:chemistry*; D018360:Crystallography, X-Ray; D000458:Cyanobacteria / Q000378:metabolism*; D006860:Hydrogen Bonding; D008345:Manganese / Q000737:chemistry*; D008956:Models, Chemical; D010084:Oxidation-Reduction; D010087:Oxides; D010100:Oxygen / Q000737:chemistry; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry*; D045332:Photosystem II Protein Complex / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D010087:Oxides; D045322:Photosynthetic Reaction Center Complex Proteins; D045332:Photosystem II Protein Complex; D014867:Water; D008345:Manganese; D010100:Oxygen; D002118:Calcium