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. 1996 Apr;70(4):1761–1768. doi: 10.1016/S0006-3495(96)79739-4

Thermotropic phase behavior and stability of monosialoganglioside micelles in aqueous solution.

M Hirai 1, T Takizawa 1, S Yabuki 1, Y Nakata 1, K Hayashi 1
PMCID: PMC1225145  PMID: 8785335

Abstract

The thermotropic phase behavior of monosialoganglioside in a dilute aqueous dispersion at pH 6.8 was measured by using synchrotron radiation small-angle x-ray scattering and was analyzed by a shell-modeling method. Previous calorimetric studies on ganglioside systems have shown quite different thermotropic behaviors from other biological lipid systems, however, the details have still been ambiguous. Because of high statistical data and a shell-modeling analysis, we could elucidate the internal structural change of monosialoganglioside micelle induced by the elevation of temperature from 6 to 60 degrees C, that is, the shrinkage of the hydrophilic region and the slight expansion of the hydrophobic region occurring simultaneously, accompanying the elongation of the axial ratios of the ellipsoidal micelles. The model structures obtained explain the changes in the experimental scattering curves, the distance distribution functions, and the gyration radii. In addition we have also found an evident thermal hysteresis in the scattering curves and in the structural parameters. The present result suggests that the thickness of the hydrophilic region, namely, the conformation of oligosaccharide chains, is sensitive to a change of temperature.

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Selected References

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

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