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Titolo:
Interaction of GM(1) glycolipid in phospholipid monolayers with wheat germagglutinin: effect of phospholipidic environment and subphase
Autore:
Heywang, C; Mathe, G; Hess, D; Sackmann, E;
Indirizzi:
Tech Univ Munich, Biophys Lab E22, Dept Phys, D-85747 Garching, Germany Tech Univ Munich Garching Germany D-85747 hys, D-85747 Garching, Germany
Titolo Testata:
CHEMISTRY AND PHYSICS OF LIPIDS
fascicolo: 1-2, volume: 113, anno: 2001,
pagine: 41 - 53
SICI:
0009-3084(200111)113:1-2<41:IOGGIP>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUARTZ-CRYSTAL MICROBALANCE; THERMOTROPIC BEHAVIOR; GANGLIOSIDE GM1; BILAYER-MEMBRANES; MODEL MEMBRANES; PHASE-BEHAVIOR; GLYCOSPHINGOLIPIDS; MIXTURES; BINDING; LECTIN;
Keywords:
GM(1); phospholipid; wheat germ agglutinin; monolayers;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Heywang, C Univ Bordeaux 1, Ctr Phys Mol Opt & Hertzienne, UMR 5798, 351 Cours Liberat, F-33405 Talence, France Univ Bordeaux 1 351 Cours Liberat Talence France F-33405 rance
Citazione:
C. Heywang et al., "Interaction of GM(1) glycolipid in phospholipid monolayers with wheat germagglutinin: effect of phospholipidic environment and subphase", CHEM PHYS L, 113(1-2), 2001, pp. 41-53

Abstract

Mixed monolayers of GM(1) glycolipid and stearoyl-oleoyl-phosphatidylcholine (SOPC) or dipalmitoyl-phosphatidycholine (DPPC) phospholipids were studied by surface pressure measurements. The effects induced by GM(1) on the mean molecular areas of mixtures and DPPC phase transition were followed for GM(1) concentrations ranging from 1 to 20 mol.%. Under our experimental conditions, one main parameter influencing the behavior of phospholipid-GM(1) monolayers is the ionic strength of the subphase. Mixed monolayers are in amore expanded state on buffer than on pure water. This could be due to a change of GM(1) orientation at the interface. The interaction of wheat germ agglutinin (WGA), a lectin recognizing specifically GM(1) with these monolayers was quantified in terms of the Gibbs equation. Specific WGA-GM(1) interactions are clearly reduced in the presence of DPPC as compared with SOPC,probably because of the higher packing density of these monolayers. Phospholipid-GM(1) monolayers could also undergo some rearrangements induced by WGA binding. (C) 2001 Published by Elsevier Science Ireland Ltd.

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Documento generato il 04/12/20 alle ore 12:52:44