Conference paper · Journal article
Neutron and X-ray scattering studies of cholera toxin interactions with lipid monolayers at the air–liquid interface
Using neutron/X-ray reflectivity and X-ray grazing incidence diffraction (GID), we have characterized the structure of mixed DPPE:GM(1) lipid monolayers before and during the binding of cholera toxin (CTAB(5)) or its B subunit (CTB(5)). Structural parameters such as the density and thickness of the lipid layer, extension of the GM(1) oligosaccharide headgroup, and orientation and position of the protein upon binding are reported.
Both CTAB(5) and CTB(5) were measured to have approximately 50% coverage when bound to the lipid monolayer. X-ray GID experiments show that both the lipid monolayer and the cholera toxin layer are crystalline. The effects of X-ray beam damage have been assessed and the monolayer/toxin structure does not change with time after protein binding has saturated.
Language: | English |
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Year: | 2005 |
Pages: | 159-163 |
Proceedings: | 10th International Conference on Organised Molecular Films |
ISSN: | 18734367 and 09277765 |
Types: | Conference paper and Journal article |
DOI: | 10.1016/j.colsurfb.2004.10.009 |