The effects of sulfatide on the fluidity and surface dynamics of bilayered and micellar model membranes of dipalmitoylglycerophosphocholine containing sulfatide were studied as a function of gel-to-liquid-crystalline state of the lipids by electron spin resonance. 5- and 15-nitroxystearic acid were employed as spinlabel probes for the region close to the surface and that close to the nonpolar core of lipid structures. The sulfatide effect is completely different above and below the gel-to-liquid-crystalline phase transition point, the glycolipid promoting a more disordered state below it and having a condensing effect above the phase transition temperature.
ESR Studies of the Dynamics of Dipalmitoylglycerophosphocholine-Sulfatide Model Membranes / B.Cestaro, G.Cervato, S.Ferrari, P.Viani, C.Oliva. - In: BIOCHEMISTRY INTERNATIONAL. - ISSN 0158-5231. - 8:1(1984), pp. 95-104.
ESR Studies of the Dynamics of Dipalmitoylglycerophosphocholine-Sulfatide Model Membranes
B.CestaroPrimo
;G.CervatoSecondo
;P.VianiPenultimo
;C.OlivaUltimo
1984
Abstract
The effects of sulfatide on the fluidity and surface dynamics of bilayered and micellar model membranes of dipalmitoylglycerophosphocholine containing sulfatide were studied as a function of gel-to-liquid-crystalline state of the lipids by electron spin resonance. 5- and 15-nitroxystearic acid were employed as spinlabel probes for the region close to the surface and that close to the nonpolar core of lipid structures. The sulfatide effect is completely different above and below the gel-to-liquid-crystalline phase transition point, the glycolipid promoting a more disordered state below it and having a condensing effect above the phase transition temperature.
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