Cytochrome d induction in Escherichia coli growing under unfavorable conditions.

Abstract

Growth of E. coli in the presence of the protonophorous uncoupler pentachlorophenol is shown to strongly enhance levels of cytochrome d, a putative Na(+)-motive oxidase. This effect was found to be arrested by chloramphenicol and stimulated by high Na+ concentration in the growth medium. The induction of cytochrome d takes place in a mutant deficient in the F0F1 ATP-synthase but does not occur in mutants deficient in either of two different components of the Arc system. Similar relationships were revealed when pentachlorophenol was replaced by ferricyanide and phenazine methosulfate, agents oxidizing the respiratory chain. Induction of cytochrome d is also shown to occur in riboflavin-deficient mutants growing in the presence of such low riboflavin concentrations as to be insufficient to maintain a high respiration rate. It is suggested (i) that it is delta mu H+ decrease rather than reduction of the respiratory chain that is the signal for the induction of cytochrome d, and (ii) the Arc system is involved in this type of metabolic regulation.

• Authors: A V Bogachev, R A Murtazina, V P Skulachev
• Journal: FEBS letters (FEBS Lett) Vol. 336 Issue 1 Pg. 75-8 (Dec 20 1993) ISSN: 0014-5793 [Print] England
• PMID: 8262220 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Ferricyanides
• hexacyanoferrate III
• Methylphenazonium Methosulfate
• Chloramphenicol
• Cytochrome d Group
• Pentachlorophenol

Topics

• Chloramphenicol (pharmacology)
• Cytochrome d Group (biosynthesis)
• Enzyme Induction
• Escherichia coli (enzymology, growth & development)
• Ferricyanides (pharmacology)
• Methylphenazonium Methosulfate (pharmacology)
• Oxidation-Reduction
• Pentachlorophenol (pharmacology)