Electron-transport chains of phototrophically and chemotrophically grown Chloroflexus aurantiacus

R. Max Wynn, Thomas E. Redlinger, John M. Foster, Robert E. Blankenship, R. Clinton Fuller, Robert W. Shaw, David B. Knaff

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The membrane-bound electron-transfer chain components of both phototrophically and chemotrophically grown Chloroflexus aurantiacus have been characterized. Membranes isolated from chemotrophically grown Chloroflexus have been shown to contain at least three c-type cytochromes and at least three b-type cytochromes. In addition, these cells appear to lack a photochemical reaction center and the high potential (Em = +260 mV) cytochrome c-554 that serves as the immediate donor to the reaction center in phototrophically grown Chloroflexus. Phototrophically grown cells contain a CO-binding c-type cytochrome, apparently absent in the chemotrophically grown cells. However, a different CO-binding component, which may function as the terminal oxidase, is present in chemotrophically grown cells.

Original languageEnglish (US)
Pages (from-to)216-226
Number of pages11
JournalBBA - Bioenergetics
Volume891
Issue number3
DOIs
StatePublished - May 6 1987

Keywords

  • (C. aurantiacus)
  • CO binding
  • Chemotrophic bacterium
  • Cytochrome b
  • Cytochrome c
  • Electron-transport chain

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Cell Biology

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