A Coupling Factor in Bacterial Photophosphorylation

The photophosphorylation activity of pigmented particles derived from membranes of the photosynthetic bacterium Rhodopseudomonas capsulata is greatly diminished by sonic treatment in the presence of EDTA. Activity can be largely restored to treated particles by addition of solubilized protein factor...

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Bibliographic Details
Published in:The Journal of biological chemistry 1970-03, Vol.245 (5), p.1224-1226
Main Authors: Baccarini-Melandri, A, Gest, H, Pietro, A S
Format: Article
Language:English
Subjects:
Adenosine Triphosphatases - metabolism
Bacterial Proteins - metabolism
Cytochromes - pharmacology
Depression, Chemical
Edetic Acid - pharmacology
Electron Transport
Kinetics
Light
Membranes - metabolism
Oxidative Phosphorylation - drug effects
Photosynthesis
Rhodopseudomonas - cytology
Rhodopseudomonas - drug effects
Rhodopseudomonas - metabolism
Solubility
Vibration
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Summary:The photophosphorylation activity of pigmented particles derived from membranes of the photosynthetic bacterium Rhodopseudomonas capsulata is greatly diminished by sonic treatment in the presence of EDTA. Activity can be largely restored to treated particles by addition of solubilized protein factor or factors, which functionally resemble coupling factors isolated from other kinds of energy-converting systems. Evidence is presented in support of the conclusion that the R. capsulata factor is required for coupling phosphorylation to electron transport rather than for catalyzing electron transport.
ISSN:0021-9258
1083-351X
DOI:10.1016/S0021-9258(18)63311-3