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Electron Spin Resonance Studies on the Dynamics of Phosphatidylcholine — Sulfatide Model Membranes by Benvenuto Cestaro; Giovanna Cervato; Sergio Marchesini; Paola Viani; Elvira Pistolesi; Cesare Oliva is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Electron Spin Resonance Studies on the Dynamics of Phosphatidylcholine — Sulfatide Model Membranes about?

The effects of sulfatide on the fluidity and surface dynamics of bilayered and micellar model membranes of egg phosphatidylcholine containing sulfatide were studied by electron spin resonance (ESR). 5-Nitroxystearic acid and 15-nitroxystearic acid were employed as spin-label probes for the region close to the surface and that close to the hydrophobic core of lipid structures. In the vesicular structures, the signals generated by 5-nitroxystearic acid showed that the presence of sulfatide reduced the mobility of the hydrocarbon chains around the probe. The effect increased with increasing glycolipid concentration. The decrease m membrane fluidity was also monitored with the 15-nitroxystearic acid probe, although to a lesser extent. We think that sulfatide causes strong side-to-side head-group interactions on the bilayer surface, causing the lipid chains to assemble m a more rigid fashion, though thin effect may be balanced in part by the disordered mechanical coupling of glycolipid acyl chains in the apposite faces of the hydrophoblc core of the bilayer. Reduction of this mechanical coupling between apposite lipids when there was transition from a bilayered to a micellar structure r

Who reads Electron Spin Resonance Studies on the Dynamics of Phosphatidylcholine — Sulfatide Model Membranes?

Author

Benvenuto Cestaro; Giovanna Cervato; Sergio Marchesini; Paola Viani; Elvira Pistolesi; Cesare Oliva

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-3084)

Published

1983

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)