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Main Title: Binuclear Manganese(III) Complexes as Electron Donors in D1/D2/Cytochrome b559 Preparations Isolated from Spinach Photosystem II Membrane Fragments
Author(s): Allakhverdiev, S. I.
Karacan, M. S.
Somer, G.
Karacan, N.
Khan, E. M.
Rane, S. Y.
Padhye, S.
Klimov, V. V.
Renger, G.
Type: Article
Language Code: en
Abstract: The capability of different manganese complexes to act as PS II electron donors in D1/D2/ cytochrome b 559 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 D1/D2/cytochrome b559 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.
Issue Date: 1994
Date Available: 10-Nov-2018
DDC Class: 570 Biowissenschaften; Biologie
Subject(s): PS II reaction center
pheophytin photoaccumulation
NADP+ reduction
Journal Title: Zeitschrift für Naturforschung C
Publisher: De Gruyter
Publisher Place: Berlin
Volume: 49
Issue: 9-10
Publisher DOI: 10.1515/znc-1994-9-1008
Page Start: 587
Page End: 592
EISSN: 1865-7125
ISSN: 0939-5075
Appears in Collections:Inst. Chemie » Publications

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