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Updated: Jul 8, 2026

Isolation of Physiologically Active Thylakoids and Their Use in Energy-Dependent Protein Transport Assays
Published on: September 28, 2018
Periplasmic electron carriers and photo-induced electron transfer in the photosynthetic bacterium Ectothiorhodospira
A Buche1, R Picorel, J M Moulis
1Plant Nutrition, Estacion Experimental Aula Dei, CSIC, Apartado 202, Zaragoza, 50080, Spain, abuche@eead.csic.es.
Abstract:
A detailed analysis of the periplasmic electron carriers of the photosynthetic bacterium Ectothiorhodospira sp. has been performed. Two low mid-point redox potential electron carriers, cytochrome c' and cytochrome c, are detected. A high potential iron-sulfur protein is the only high mid-point redox potential electron transfer component present in the periplasm. Analysis of light-induced absorption changes shows that this high potential iron-sulfur protein acts in vivo as efficient electron donor to the photo-oxidized high potential heme of the Ectothiorhodospira sp. reaction center.
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