Transcriptional regulation of the proton-translocating ATPase (atpIBEFHAGDC) operon of Escherichia coli: Control by cell growth rate

Elvin Kasimoglu, Soon Jung Park, Joel Malek, Ching Ping Tseng, Robert P. Gunsalus

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

The F0F1 proton-translocating ATPase complex of Escherichia coli, encoded by the atpIBEFHAGDC operon, catalyzes the synthesis of ATP from ADP and P1 during aerobic and anaerobic growth when respiratory substrates are present. It can also catalyze the reverse reaction to hydrolyze ATP during nonrespiratory conditions (i.e., during fermentation of simple sugars) in order to maintain a electrochemical proton gradient across the cytoplasmic membrane. To examine how the atp genes are expressed under different conditions of cell culture, atpI-lacZ operon fusions were constructed and analyzed in single copy on the bacterial chromosome or on low-copy-number plasmids. Expression varied over a relatively narrow range (about threefold) regardless of the complexity of the cell growth medium, the availability of different electron acceptors or carbon compounds, or the pH of the culture medium. In contrast to prior proposals, atp operon expression was shown to occur from a single promoter located immediately before atpI rather than from within it. The results of continuous-culture experiments suggest that the cell growth rate rather than the type of carbon compound used for growth is the major variable in controlling atp gene expression. Together, these studies establish that synthesis of the F0F1 ATPase is not greatly varied by modulating atp operon transcription.

Original languageEnglish
Pages (from-to)5563-5567
Number of pages5
JournalJournal of Bacteriology
Volume178
Issue number19
Publication statusPublished - 1996
Externally publishedYes

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Proton-Translocating ATPases
Operon
Escherichia coli
Growth
Carbon
Adenosine Triphosphate
Bacterial Chromosomes
Adenosine Diphosphate
Fermentation
Culture Media
Protons
Plasmids
Cell Culture Techniques
Cell Membrane
Electrons
Gene Expression
Genes

ASJC Scopus subject areas

  • Applied Microbiology and Biotechnology
  • Immunology

Cite this

Transcriptional regulation of the proton-translocating ATPase (atpIBEFHAGDC) operon of Escherichia coli : Control by cell growth rate. / Kasimoglu, Elvin; Park, Soon Jung; Malek, Joel; Tseng, Ching Ping; Gunsalus, Robert P.

In: Journal of Bacteriology, Vol. 178, No. 19, 1996, p. 5563-5567.

Research output: Contribution to journalArticle

Kasimoglu, Elvin ; Park, Soon Jung ; Malek, Joel ; Tseng, Ching Ping ; Gunsalus, Robert P. / Transcriptional regulation of the proton-translocating ATPase (atpIBEFHAGDC) operon of Escherichia coli : Control by cell growth rate. In: Journal of Bacteriology. 1996 ; Vol. 178, No. 19. pp. 5563-5567.
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