TY - JOUR
T1 - Bioenergetics studies of the cyanobacterium anabaena variabilis
AU - Scherer, Siegfried
AU - Sadowski, Heike
AU - Böger, Peter
N1 - Funding Information:
We are grateful to Dr. B. L. Trumpower. Hanover, New Hampshire, USA, for a gift of UHDBT; Dr. W. Trowitzsch, Braunschweig, Germany, for supplying us with myxothiazol and Dr. H. Almon, Konstanz, for stimulating discussions. The technical assistance of Regina Grimm is gratefully acknowledged. This study was supported by the Deutsche Forschungsgemeinschaft.
PY - 1987/12/1
Y1 - 1987/12/1
N2 - A cell-free system exhibiting both photophosphorylation (P /2e = 1) and oxidative phosphorylation (P/O up to 0.8) is described for the cyanobacterium Anabaena variabilis. NADH and NADPH were found to be equally effective aselectron donors for oxidative phosphorylation. Low concentrations of UHDBT, an inhibitor of the cytochrome b/c complex of mitochondria and chloroplasts. were found to inhibit photosystem-II electron transport reactions, but did not affect the cytochrome b6/f-Complex of Anabaena. The inhibition by myxothiazol, antimycin and heptylhydroxyquinoline corroborates the hypothesis that both respiration and photosynthesis share the cytochrome b6/f-Complex.
AB - A cell-free system exhibiting both photophosphorylation (P /2e = 1) and oxidative phosphorylation (P/O up to 0.8) is described for the cyanobacterium Anabaena variabilis. NADH and NADPH were found to be equally effective aselectron donors for oxidative phosphorylation. Low concentrations of UHDBT, an inhibitor of the cytochrome b/c complex of mitochondria and chloroplasts. were found to inhibit photosystem-II electron transport reactions, but did not affect the cytochrome b6/f-Complex of Anabaena. The inhibition by myxothiazol, antimycin and heptylhydroxyquinoline corroborates the hypothesis that both respiration and photosynthesis share the cytochrome b6/f-Complex.
KW - Cytochrome b/f-Complex
KW - Electron Flow
KW - Oxidative Phosphorylation
KW - Photophosphorylation
KW - Respiratory and Photosynthetic Inhibitors
UR - http://www.scopus.com/inward/record.url?scp=5544224296&partnerID=8YFLogxK
U2 - 10.1515/znc-1987-11-1222
DO - 10.1515/znc-1987-11-1222
M3 - Article
AN - SCOPUS:5544224296
SN - 0939-5075
VL - 42
SP - 1280
EP - 1284
JO - Zeitschrift fur Naturforschung - Section C Journal of Biosciences
JF - Zeitschrift fur Naturforschung - Section C Journal of Biosciences
IS - 11-12
ER -