Archiv für Mikrobiologie

, Volume 59, Issue 1–3, pp 32–40 | Cite as

Ferredoxin-dependent carbon assimilation in Rhodospirillum rubrum

  • Bob B. Buchanan
  • M. C. W. Evans
  • Daniel I. Arnon


Evidence has been presented that a soluble fraction from R. rubrum cells contains two new primary carboxylation reactions which depend on the reducing power of ferredoxin: (a) pyruvate synthase which brings about a synthesis of pyruvate from acetyl-CoA and CO2 and (b) α-ketoglutarate synthase which brings about a synthesis of α-ketoglutarate from succinyl-CoA and CO2. The soluble fraction of R. rubrum cells contains also a series of other enzymes which, together with the ferredoxin-dependent enzymes, constitutes a reductive carboxylic acid cycle—a new cyclic pathway for CO2 assimilation that was first found in the photosynthetic bacterium, Chlorobium thiosulfatophilum.


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Copyright information

© Springer-Verlag 1967

Authors and Affiliations

  • Bob B. Buchanan
    • 1
  • M. C. W. Evans
    • 1
  • Daniel I. Arnon
    • 1
  1. 1.Department of Cell PhysiologyUniversity of CaliforniaBerkeley

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