ArticleBiophysical journal2008
Temperature dependence of structure, bending rigidity, and bilayer interactions of dioleoylphosphatidylcholine bilayers.
Article in Biophysical journal, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 119 papers.
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119 citing papers in PubMed.
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- Ion-Mediated Structural Discontinuities in Phospholipid Vesicles.Langmuir : the ACS journal of surfaces and colloids · 2024Article
- Mild Hyperthermia-Induced Thermogenesis in the Endoplasmic Reticulum Defines Stress Response Mechanisms.Cells · 2024Article
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- Physiological and Transcriptomic Responses of Bok Choy to Heat Stress.Plants (Basel, Switzerland) · 2024Article
- Unraveling the Phase Behavior, Mechanical Stability, and Protein Reconstitution Properties of Polymer-Lipid Hybrid Vesicles.Biomacromolecules · 2023Article
- Effects of acute heat stress on haemato-biochemical parameters, oxidative resistance ability, and immune responses of hybrid yellow catfish (pelteobagrus fulvidraco × P. vachelli) juveniles.Veterinary research communications · 2023Article
- Viscosity-Sensitive Membrane Dyes as Tools To Estimate the Crystalline Structure of Lipid Bilayers.Analytical chemistry · 2023Article
59 more citing papers are in PubMed but not listed here.
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4 authors.
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Abstract
X-ray diffuse scattering was measured from oriented stacks and unilamellar vesicles of dioleoylphosphatidylcholine lipid bilayers to obtain the temperature dependence of the structure and of the material properties. The area/molecule, A, was 75.5 A(2) at 45 degrees C, 72.4 A(2) at 30 degrees C, and 69.1 A(2) at 15 degrees C, which gives the area expansivity alpha(A) = 0.0029/deg at 30 degrees C, and we show that this value is in excellent agreement with the polymer brush theory. The bilayer becomes thinner with increasing temperature; the contractivity of the hydrocarbon portion was alpha(Dc) = 0.0019/deg; the difference between alpha(A) and alpha(Dc) is consistent with the previously measured volume expansivity alpha(Vc) = 0.0010/deg. The bending modulus K(C) decreased as exp(455/T) with increasing T (K). Our area compressibility modulus K(A) decreased with increasing temperature by 5%, the same as the surface tension of dodecane/water, in agreement again with the polymer brush theory. Regarding interactions between bilayers, the compression modulus B as a function of interbilayer water spacing D'(W) was found to be nearly independent of temperature. The repulsive fluctuation pressure calculated from B and K(C) increased with temperature, and the Hamaker parameter for the van der Waals interaction was nearly independent of temperature; this explains why the fully hydrated water spacing, D'(W), that we obtain from our structural results increases with temperature.
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