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The Relationship between Membrane Lipid Fluidity and Phase State and the Ability of Bacteria and Mycoplasmas to Grow and Survive at Various Temperatures

  • Ronald N. McElhaney
Part of the Biomembranes book series (B, volume 12)

Abstract

Many of the contributions in this volume are concerned with the physical measurement and biochemical regulation of membrane lipid fluidity in prokaryotic microorganisms. This contribution is primarily concerned with the biological function of such regulatory mechanisms and with the physiological consequences of their absence or impairment. In the first part of this essay, some brief comments on the concept of fluidity as applied to membranes are offered and a short, critical analysis of the physical techniques available for the measurement of lipid fluidity and phase state is given. Next, a summary and critical discussion of what we currently know about the relationship between membrane lipid fluidity and phase state and the ability of bacteria and mycoplasmas to grow at various temperatures are presented. Related work on the influence of the fatty acid composition of the lipids of bacterial membranes on their ability to survive exposure to extremes of temperature is then reviewed. Finally, the possible molecular bases for the observed relationships between membrane lipid fluidity and phase state and the growth and survival of prokaryotic microorganisms are discussed, as is the biological significance of homeoviscous or homeophasic regulatory mechanisms in bacteria and mycoplasmas.

Keywords

Electron Spin Resonance Fatty Acid Composition Membrane Lipid Growth Temperature Phase Transition Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • Ronald N. McElhaney
    • 1
  1. 1.Department of BiochemistryUniversity of AlbertaEdmontonCanada

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