Specific interaction of concanavalin a with glycolipid monolayers |
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Authors: | BD Read RA Demel H Wiegand LLM van Deenen |
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Institution: | 1. Biochemistry Laboratory, State University of Utrecht, Padualaan 8, Utrecht 2506, The Netherlands;2. Physiologisch-Chemisches Institut I, Philipps-Universität, 355 Marburg, Lahnberge, G.F.R. |
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Abstract: | The effect of 131I-labelled concanavalin A on the surface pressure and surface radioactivity of monolayers formed from phospholipids and from natural and synthetic glycolipids has been studied. The lectin binds to and penetrates dipalmitoyl phosphatidylcholine monolayers at a surface pressure of 15 dynes/cm and this interaction is inhibited by the presence of α-methyl mannose int he subphase. At surface pressures of 25 dynes/cm or higher, concanavalin A will interact with monoglucosyl diglyceride or diglucosyl diglyceride from Acholeplasma laidlawii and with synthetic glycolipids containing D-glucose residues in the headgroup, but not with phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, or with the ganglioside II3NeuAc-GgOse4-Cer. The binding to the glycolipid sugar group and penetration of the hydrocarbon region seem to occur simultaneously, as the time courses for the development of surface pressure and surface radioactivity coincide. |
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Keywords: | To whom requests for reprints should be addressed |
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