Skip to main content
PMC home page
Applied and Environmental Microbiology logoLink to Applied and Environmental Microbiology
. 1989 Jan;55(1):259–260. doi: 10.1128/aem.55.1.259-260.1989

Lasalocid-catalyzed proton conductance in Streptococcus bovis as affected by extracellular potassium.

W R Schwingel 1, D B Bates 1, S C Denham 1, D K Beede 1
PMCID: PMC184090  PMID: 2705771

Abstract

The effect of extracellular potassium on lasalocid-catalyzed proton conductance in Streptococcus bovis 24 was measured by using the fluorescent probe 9-aminoacridine. Increasing external potassium concentration resulted in decreased proton flux into S. bovis cells exposed to the ionophore. These results suggest that lasalocid catalyzes K+/H+ exchange diffusion in S. bovis cells.

Full text

PDF
259

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Bergen W. G., Bates D. B. Ionophores: their effect on production efficiency and mode of action. J Anim Sci. 1984 Jun;58(6):1465–1483. doi: 10.2527/jas1984.5861465x. [DOI] [PubMed] [Google Scholar]
  2. Booth I. R. Regulation of cytoplasmic pH in bacteria. Microbiol Rev. 1985 Dec;49(4):359–378. doi: 10.1128/mr.49.4.359-378.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Caldwell D. R., Bryant M. P. Medium without rumen fluid for nonselective enumeration and isolation of rumen bacteria. Appl Microbiol. 1966 Sep;14(5):794–801. doi: 10.1128/am.14.5.794-801.1966. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Casadio R., Melandri B. A. Calibration of the response of 9-amino acridine fluorescence to transmembrane pH differences in bacterial chromatophores. Arch Biochem Biophys. 1985 Apr;238(1):219–228. doi: 10.1016/0003-9861(85)90159-6. [DOI] [PubMed] [Google Scholar]
  5. Kashket E. R. The proton motive force in bacteria: a critical assessment of methods. Annu Rev Microbiol. 1985;39:219–242. doi: 10.1146/annurev.mi.39.100185.001251. [DOI] [PubMed] [Google Scholar]
  6. Pressman B. C. Biological applications of ionophores. Annu Rev Biochem. 1976;45:501–530. doi: 10.1146/annurev.bi.45.070176.002441. [DOI] [PubMed] [Google Scholar]
  7. Russell J. B. A proposed mechanism of monensin action in inhibiting ruminal bacterial growth: effects on ion flux and protonmotive force. J Anim Sci. 1987 May;64(5):1519–1525. doi: 10.2527/jas1987.6451519x. [DOI] [PubMed] [Google Scholar]
  8. Schuldiner S., Rottenberg H., Avron M. Determination of pH in chloroplasts. 2. Fluorescent amines as a probe for the determination of pH in chloroplasts. Eur J Biochem. 1972 Jan 31;25(1):64–70. doi: 10.1111/j.1432-1033.1972.tb01667.x. [DOI] [PubMed] [Google Scholar]

Articles from Applied and Environmental Microbiology are provided here courtesy of American Society for Microbiology (ASM)

RESOURCES