Interactions of surfactin,a biosurfactant fromBacillus subtilis,with inorganic cations |
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Authors: | Laurence Thimon Françoise Peypoux Georges Michel |
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Affiliation: | (1) Laboratoire de Biochimie Microbienne, Université Lyon 1, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, Cedex, France |
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Abstract: | Summary The properties of surfactin, a biosurfactant lipopeptide, were highly modified in the presence of inorganic cations. The micellization of surfactin was favoured by monovalent and, especially by divalent cations with a modification of the molecular area at the air-water interface. Haemolysis of erythrocytes by surfactin was enhanced by low concentrations of divalent cations with an increase of the binding of the lipopeptide to membrane. Inorganic ions induced conformational rearrangements probably due to ion-surfactin associations which modify the surface-active properties. |
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