Back to Search Start Over

Stable immobilization of lipid vesicles for kinetic studies using surface plasmon resonance.

Authors :
Masson L
Mazza A
Brousseau R
Source :
Analytical biochemistry [Anal Biochem] 1994 May 01; Vol. 218 (2), pp. 405-12.
Publication Year :
1994

Abstract

In order to study the kinetics of binding between membrane vesicle surface receptors to the lepidopteran insecticidal toxins from Bacillus thuringiensis using surface plasmon resonance, we have developed a technique to immobilize membrane vesicles purified from the brush border of dissected guts from the lepidopteran insect pest Choristoneura fumiferana. Two methods using immobilized immunoglobulins against either avidin or biotin were successful in achieving stable immobilization of the vesicles (> 1.5 h). Specificity of the immobilized receptors exposed on the vesicle surface was demonstrated, in part, by the inability of bovine serum albumin to bind to the immobilized brush border membrane vesicles. Homologous and heterologous competition experiments further demonstrated specific binding of trypsin-activated CryIA(c) toxin to the cell-surface receptors on the vesicles. Kinetic rate constants for activated cryIA(b) toxin binding to brush border vesicles were determined, revealing the presence of a high-affinity receptor on the surface of the immobilized brush border membrane vesicles.

Details

Language :
English
ISSN :
0003-2697
Volume :
218
Issue :
2
Database :
MEDLINE
Journal :
Analytical biochemistry
Publication Type :
Academic Journal
Accession number :
8074300
Full Text :
https://doi.org/10.1006/abio.1994.1199