Possible relationship of mechanisms of Mn2+ oxidation and formation of plant photosystem II manganese cluster.
The mechanisms of Mn2+ cation oxidation in alkaline, neutral and slightly acidic media were studied. In all cases, the Mn2+ oxidation resulted in the formation of the structure[see text]. The formal resemblance and differences in the Mn2O3 structure and Klein's model of the Mn cluster of PS II were noted. The necessity of the primary ligation of Mn2+ cations was discussed for both the decrease in the Mn2+ oxidation potential and the stability of the Mn2O3 structure. It was supposed that Mn2O3 is an initial block for the assembly of the inorganic core of the photosynthetic water-oxidizing complex.
Kozlov
Y N
YN
Institute of Soil Science and Photosynthesis, Russian Academy of Sciences, Pushchino, Moscow Region.
Klimov
V V
VV
D007700:Kinetics; D008345:Manganese / Q000378:metabolism*; D008956:Models, Chemical; D010084:Oxidation-Reduction; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry* / Q000378:metabolism*; D045332:Photosystem II Protein Complex
D045322:Photosynthetic Reaction Center Complex Proteins; D045332:Photosystem II Protein Complex; D008345:Manganese