Physical properties of archaeal tetraether lipid membranes as revealed by differential scanning and pressure perturbation calorimetry, molecular acoustics, and neutron reflectometry: effects of pressure and cell growth temperature

Langmuir : the ACS Journal of Surfaces and Colloids
Yong ZhaiRoland Winter

Abstract

The polar lipid fraction E (PLFE) is a major tetraether lipid component in the thermoacidophilic archaeon Sulfolobus acidocaldarius. Using differential scanning and pressure perturbation calorimetry as well as ultrasound velocity and density measurements, we have determined the compressibilities and volume fluctuations of PLFE liposomes derived from different cell growth temperatures (T(g) = 68, 76, and 81 °C). The compressibility and volume fluctuation values of PLFE liposomes, which are substantially less than those detected from diester lipid membranes (e.g., DPPC), exhibit small but significant differences with T(g). Among the three T(g)s employed, 76 °C leads to the least compressible and most tightly packed PLFE membranes. This temperature is within the range for optimal cell growth (75-80 °C). It is known that a decrease in T(g) decreases the number of cyclopentane rings in archael tetraether lipids. Thus, our data enable us to present the new view that membrane packing in PLFE liposomes varies with the number of cyclopentane rings in a nonlinear manner, reaching maximal tightness when the tetraether lipids are derived from cells grown at optimal T(g)s. In addition, we have studied the effects of pressure on total layer ...Continue Reading

References

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Nov 18, 2010·Biophysical Journal·Parkson Lee-Gau ChongRoland Winter
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Jan 25, 2011·Biophysical Chemistry·Yong ZhaiRoland Winter
Mar 3, 2011·The Review of Scientific Instruments·Christoph JeworrekRoland Winter
May 17, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Florian EversClaus Czeslik
Sep 14, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Christoph JeworrekRoland Winter

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Citations

Oct 3, 2012·Archaea : an International Microbiological Journal·Parkson Lee-Gau ChongEllah Chay Hur
Aug 7, 2013·Biophysical Chemistry·Philippe M Oger, Anaïs Cario
Oct 11, 2012·Archaea : an International Microbiological Journal·Elina Roine, Dennis H Bamford
Nov 17, 2019·International Journal of Molecular Sciences·Alexander BonannoParkson Lee-Gau Chong
Jun 4, 2020·International Journal of Molecular Sciences·Kerstin RastädterJulian Quehenberger

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