Sulfide quinone reductase (SQR) activity in Chlorobium

Y. Shahak*, B. Arieli, E. Padan, G. Hauska

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Membranes of the green sulfur bacterium, Chlorobium limicola f, thiosulfatophilum, catalyze the reduction of externally added isoprenoid quinones by sulfide. This activity is highly sensitive to stigmatellin and aurachins. It is also inhibited by 2-n-nonyl-4-hydroxyquinoline-N-oxide, antimycin, myxothiazol and cyanide. It is concluded that in sulfide oxidizing bacteria like Chlorobium, sulfide oxidation involves a sulfide-quinone reductase (SQR) similar to the one found in Oscilatoria limnetica [Arieli, B., Padan, E. and Shahak, Y. (1991) J. Biol. Chem. 266. 104-111].

Original languageEnglish
Pages (from-to)127-130
Number of pages4
JournalFEBS Letters
Volume299
Issue number2
DOIs
StatePublished - 9 Mar 1992

Keywords

  • Chlorobium limicola
  • Electron transport
  • Photosynthesis
  • Quinone reductions
  • Sulfide oxidation

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