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.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Bogachev AV,Murtazina RA,Skulachev VP

doi

10.1016/0014-5793(93)81612-4

subject

Has Abstract

pub_date

1993-12-20 00:00:00

pages

75-8

issue

1

eissn

0014-5793

issn

1873-3468

pii

0014-5793(93)81612-4

journal_volume

336

pub_type

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