Bioenergetics studies of the cyanobacterium anabaena variabilis

Siegfried Scherer; Heike Sadowski; Peter Böger

doi:10.1515/znc-1987-11-1222

Bioenergetics studies of the cyanobacterium anabaena variabilis

Siegfried Scherer
, Heike Sadowski
, Peter Böger

Universitat Konstanz

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

4 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	1280-1284
Number of pages	5
Journal	Zeitschrift fur Naturforschung - Section C Journal of Biosciences
Volume	42
Issue number	11-12
DOIs	https://doi.org/10.1515/znc-1987-11-1222
State	Published - 1 Dec 1987
Externally published	Yes

Keywords

Cytochrome b/f-Complex
Electron Flow
Oxidative Phosphorylation
Photophosphorylation
Respiratory and Photosynthetic Inhibitors

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10.1515/znc-1987-11-1222

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title = "Bioenergetics studies of the cyanobacterium anabaena variabilis",

abstract = "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.",

keywords = "Cytochrome b/f-Complex, Electron Flow, Oxidative Phosphorylation, Photophosphorylation, Respiratory and Photosynthetic Inhibitors",

author = "Siegfried Scherer and Heike Sadowski and Peter B{\"o}ger",

note = "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.",

year = "1987",

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doi = "10.1515/znc-1987-11-1222",

language = "English",

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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 - https://www.scopus.com/pages/publications/5544224296

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 -

Bioenergetics studies of the cyanobacterium anabaena variabilis

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Keywords

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