Abstract
Reconstitution of Mn-depleted PSII particles with synthetic binuclear Mn complexes (one Mn(II)2 complex and one Mn(IV)2 complex) was examined. In both cases the electron-transfer rates in the reconstituted systems were found to be up to 75–82% of that measured in native PSII but the oxygen evolution activity remained lower (<5–40%). However, hydrogen peroxide was also produced by the reconstituted samples. These samples therefore represent a new type of reconstituted PSII that generates hydrogen peroxide as the final product in reconstituted PSII centers.
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Acknowledgments
We are grateful to Professors Jim Barber and Julian Eaton-Rye for carefully reading this manuscript and for valuable comments and discussion. This work was financially supported in part by Institute for Molecular Science (Japan), by a Grant-in-Aid for Scientific Research (No: 15655053 to TN) from JSPS, and by a grant from Russian Foundation for Basic Research (No: 05-04-49672) and by the program PCB RAS (to ASI).
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Nagata, T., Nagasawa, T., Zharmukhamedov, S.K. et al. Reconstitution of the water-oxidizing complex in manganese-depleted photosystem II preparations using synthetic binuclear Mn(II) and Mn(IV) complexes: production of hydrogen peroxide. Photosynth Res 93, 133–138 (2007). https://doi.org/10.1007/s11120-007-9161-5
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DOI: https://doi.org/10.1007/s11120-007-9161-5