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. 1978 Dec 1;175(3):1113–1118. doi: 10.1042/bj1751113

Interactions of gangliosides with phospholipids and glycosphingolipids in mixed monolayers.

B Maggio, F A Cumar, R Caputto
PMCID: PMC1186174  PMID: 743230

Abstract

1. The interactions among five different gangliosides and three chemically related glycosphingolipids and their behaviour in mixed monolayers with six different phospholipids were investigated at the air/145 mM-NaCl interface at pH 5.6. 2. The mixed monolayers of any of the different gangliosides showed an immiscible behaviour at high surface pressures, with absence of interactions among them revealed by an ideal behaviour for mean molecular area and surface potential per molecule. 3. This behaviour was probably the consequence of steric hindrance and electrostatic repulsions between their polar head groups. 4. Di- and tri-sialogangliosides could be differentiated from neutral sphingolipids and monosialogangliosides on the basis of their interactions with phospholipids, which were correlated to the perpendicular electric field at the interface contributed by the carbohydrate residues. 5. The presence of the phosphocholine polar head group in phosphatidylcholine was important to establish interactions with di- and tri-sialogangliosides revealed by negative deviations from the ideal behaviour for mean molecular areas and mean surface potential per molecule. 6. The possible significance of these observations is discussed in relation to the participation of gangliosides in the organization of membranes and to their capability of inducing membrane fusion.

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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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