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Periplasmic electron carriers and photo-induced electron transfer in the photosynthetic bacterium Ectothiorhodospira sp.

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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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Authors and Affiliations

  1. Plant Nutrition, Estacion Experimental Aula Dei, CSIC, Apartado 202, Zaragoza, 50080, Spain; Author for correspondence (e-mail

    André Buche

  2. Plant Nutrition, Estacion Experimental Aula Dei, CSIC, Apartado 202, Zaragoza, 50080, Spain

    Rafael Picorel

  3. Laboratoire Métalloprotéines, C.E.A./Grenoble-DSV-DBMS, 17 ave des Martyrs, 38054, Grenoble Cedex 9, France

    Jean-Marc Moulis

  4. Laboratoire de Bioénergétique Cellulaire, C.E.A./Cadarache-DSV-DEVM, 13108, Saint-Paul-lez-Durance Cedex, France

    André Verméglio

Authors
  1. André Buche
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  2. Rafael Picorel
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  3. Jean-Marc Moulis
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  4. André Verméglio
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Correspondence to André Buche.

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Buche, A., Picorel, R., Moulis, JM. et al. Periplasmic electron carriers and photo-induced electron transfer in the photosynthetic bacterium Ectothiorhodospira sp.. Photosynthesis Research 65, 53–62 (2000). https://doi.org/10.1023/A:1006486307473

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  • DOI: https://doi.org/10.1023/A:1006486307473

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