Binuclear Manganese(III) Complexes as Electron Donors in D1/D 2/Cytochrome b 559 Preparations Isolated from Spinach Photosystem II Membrane Fragments

S. I. Allakhverdiev; V. V. Klimov; M. S. Karacan; G. Somer; N. Karacan; E. M. Khan; S. Y. Rane; S. Padhye; G. Renger

doi:10.1515/znc-1994-9-1008

Binuclear Manganese(III) Complexes as Electron Donors in D1/D 2/Cytochrome b 559 Preparations Isolated from Spinach Photosystem II Membrane Fragments

S. I. Allakhverdiev, V. V. Klimov, M. S. Karacan, G. Somer, N. Karacan, E. M. Khan, S. Y. Rane, S. Padhye, G. Renger

Research Institute for Interdisciplinary Science

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The capability of different manganese complexes to act as PS II electron donors in D 1/D2/ cytochrome b559 complexes has been analyzed by measuring actinic light-induced absorption changes at 680 nm (650 nm) and 340 nm, reflecting the photoaccumulation of Pheophytin - (Pheo-) and the reduction of NADP+, respectively. The data obtained reveal: a) the donor capacity of synthetic binuclear Mn(III)2 complexes containing aromatic ligands significantly exceeds that for MnCl2 in both cases, i.e. Pheo photoaccumulation and NADP+ reduction; b) manganese complexes can serve as suitable electron donors for light-induced NADP+ reduction catalyzed by D 1/D 2/cytochrome b 559 complexes and ferredoxin plus ferredoxin-NADP+ reductase under anaerobic conditions and c) the specific turnover rate of the system leading to NADP+ reduction is extremely, small. The implications of these findings are briefly, discussed.

Original language	English
Pages (from-to)	587-592
Number of pages	6
Journal	Zeitschrift fur Naturforschung - Section C Journal of Biosciences
Volume	49
Issue number	9-10
DOIs	https://doi.org/10.1515/znc-1994-9-1008
Publication status	Published - Oct 1994

Keywords

Manganese
NADP+ Reduction
PS II Reaction Center
Pheophytin Photoaccumulation

ASJC Scopus subject areas

Biochemistry, Genetics and Molecular Biology(all)

Access to Document

10.1515/znc-1994-9-1008

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Allakhverdiev, S. I., Klimov, V. V., Karacan, M. S., Somer, G., Karacan, N., Khan, E. M., Rane, S. Y., Padhye, S., & Renger, G. (1994). Binuclear Manganese(III) Complexes as Electron Donors in D1/D 2/Cytochrome b 559 Preparations Isolated from Spinach Photosystem II Membrane Fragments. Zeitschrift fur Naturforschung - Section C Journal of Biosciences, 49(9-10), 587-592. https://doi.org/10.1515/znc-1994-9-1008

Binuclear Manganese(III) Complexes as Electron Donors in D1/D 2/Cytochrome b 559 Preparations Isolated from Spinach Photosystem II Membrane Fragments. / Allakhverdiev, S. I.; Klimov, V. V.; Karacan, M. S.; Somer, G.; Karacan, N.; Khan, E. M.; Rane, S. Y.; Padhye, S.; Renger, G.

In: Zeitschrift fur Naturforschung - Section C Journal of Biosciences, Vol. 49, No. 9-10, 10.1994, p. 587-592.

Research output: Contribution to journal › Article › peer-review

Allakhverdiev, SI, Klimov, VV, Karacan, MS, Somer, G, Karacan, N, Khan, EM, Rane, SY, Padhye, S & Renger, G 1994, 'Binuclear Manganese(III) Complexes as Electron Donors in D1/D 2/Cytochrome b 559 Preparations Isolated from Spinach Photosystem II Membrane Fragments', Zeitschrift fur Naturforschung - Section C Journal of Biosciences, vol. 49, no. 9-10, pp. 587-592. https://doi.org/10.1515/znc-1994-9-1008

Allakhverdiev, S. I. ; Klimov, V. V. ; Karacan, M. S. ; Somer, G. ; Karacan, N. ; Khan, E. M. ; Rane, S. Y. ; Padhye, S. ; Renger, G. / Binuclear Manganese(III) Complexes as Electron Donors in D1/D 2/Cytochrome b 559 Preparations Isolated from Spinach Photosystem II Membrane Fragments. In: Zeitschrift fur Naturforschung - Section C Journal of Biosciences. 1994 ; Vol. 49, No. 9-10. pp. 587-592.

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title = "Binuclear Manganese(III) Complexes as Electron Donors in D1/D 2/Cytochrome b 559 Preparations Isolated from Spinach Photosystem II Membrane Fragments",

abstract = "The capability of different manganese complexes to act as PS II electron donors in D 1/D2/ cytochrome b559 complexes has been analyzed by measuring actinic light-induced absorption changes at 680 nm (650 nm) and 340 nm, reflecting the photoaccumulation of Pheophytin - (Pheo-) and the reduction of NADP+, respectively. The data obtained reveal: a) the donor capacity of synthetic binuclear Mn(III)2 complexes containing aromatic ligands significantly exceeds that for MnCl2 in both cases, i.e. Pheo photoaccumulation and NADP+ reduction; b) manganese complexes can serve as suitable electron donors for light-induced NADP+ reduction catalyzed by D 1/D 2/cytochrome b 559 complexes and ferredoxin plus ferredoxin-NADP+ reductase under anaerobic conditions and c) the specific turnover rate of the system leading to NADP+ reduction is extremely, small. The implications of these findings are briefly, discussed.",

keywords = "Manganese, NADP+ Reduction, PS II Reaction Center, Pheophytin Photoaccumulation",

author = "Allakhverdiev, {S. I.} and Klimov, {V. V.} and Karacan, {M. S.} and G. Somer and N. Karacan and Khan, {E. M.} and Rane, {S. Y.} and S. Padhye and G. Renger",

note = "Funding Information: S. I. A. is grateful to TUBITAK (Turkish Scientific and Research Council) for a grant which supported part of this study. G. R. gratefully acknowledges financial support by Deutsche Forschungsgemeinschaft (438 113/138). Part of this work was also supported by the Russian Foundation of Basic Research and by The International Science Foundation (grant MTZ 000).",

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doi = "10.1515/znc-1994-9-1008",

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AU - Allakhverdiev, S. I.

AU - Klimov, V. V.

AU - Karacan, M. S.

AU - Somer, G.

AU - Karacan, N.

AU - Khan, E. M.

AU - Rane, S. Y.

AU - Padhye, S.

AU - Renger, G.

N1 - Funding Information: S. I. A. is grateful to TUBITAK (Turkish Scientific and Research Council) for a grant which supported part of this study. G. R. gratefully acknowledges financial support by Deutsche Forschungsgemeinschaft (438 113/138). Part of this work was also supported by the Russian Foundation of Basic Research and by The International Science Foundation (grant MTZ 000).

PY - 1994/10

Y1 - 1994/10

N2 - The capability of different manganese complexes to act as PS II electron donors in D 1/D2/ cytochrome b559 complexes has been analyzed by measuring actinic light-induced absorption changes at 680 nm (650 nm) and 340 nm, reflecting the photoaccumulation of Pheophytin - (Pheo-) and the reduction of NADP+, respectively. The data obtained reveal: a) the donor capacity of synthetic binuclear Mn(III)2 complexes containing aromatic ligands significantly exceeds that for MnCl2 in both cases, i.e. Pheo photoaccumulation and NADP+ reduction; b) manganese complexes can serve as suitable electron donors for light-induced NADP+ reduction catalyzed by D 1/D 2/cytochrome b 559 complexes and ferredoxin plus ferredoxin-NADP+ reductase under anaerobic conditions and c) the specific turnover rate of the system leading to NADP+ reduction is extremely, small. The implications of these findings are briefly, discussed.

AB - The capability of different manganese complexes to act as PS II electron donors in D 1/D2/ cytochrome b559 complexes has been analyzed by measuring actinic light-induced absorption changes at 680 nm (650 nm) and 340 nm, reflecting the photoaccumulation of Pheophytin - (Pheo-) and the reduction of NADP+, respectively. The data obtained reveal: a) the donor capacity of synthetic binuclear Mn(III)2 complexes containing aromatic ligands significantly exceeds that for MnCl2 in both cases, i.e. Pheo photoaccumulation and NADP+ reduction; b) manganese complexes can serve as suitable electron donors for light-induced NADP+ reduction catalyzed by D 1/D 2/cytochrome b 559 complexes and ferredoxin plus ferredoxin-NADP+ reductase under anaerobic conditions and c) the specific turnover rate of the system leading to NADP+ reduction is extremely, small. The implications of these findings are briefly, discussed.

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