Functional immobilisation of the nicotinic acetylcholine receptor in tethered lipid membranes
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The ability of organisms, or individual cells, to react to external chemical signals, which are detected and transduced by cell-surface receptors, is crucial for their survival. These receptors are the targets of the majority of clinically used medicines. ...
Ligand binding to the nicotinic acetylcholine receptor is studied by surface plasmon resonance. Biotinylated bungarotoxin, immobilized on a streptavidin-coated gold film, binds nicotinic acetylcholine receptor both in detergent-solubilized and in lipid ves ...
A fluorescently labeled ligand for the 5-HT3 serotonin receptor was synthesized and its sub-nanomolar affinity for the purified, detergent solubilized receptor was measured. The change in the ligand's fluorescence upon receptor binding was used to directly ...
A highly-sensitive surface fluorescence technique was combined with a powerful method for the oriented reversible immobilization of membrane proteins on oxide surfaces. Affinity and kinetic parameters of the interaction of the receptor and a fluorescent li ...
The 5-hydroxytryptamine receptor of type 3 was investigated by fluorescence correlation spectroscopy (FCS). Binding constants of fluorescently labeled ligands, the stoichiometry, and the mass of the receptor are readily accessible by this technique, while ...
Novel fluorescence approaches to investigate ligand recognition and structure of G protein-coupled receptors in native membranes have been developed. These methods combine the biosynthetic incorporation of unnatural fluorescent amino acids at known sites i ...
The authors probed the function of receptor protein OmpF by in situ measurement of both the binding of ligands by surface plasmon resonance (SPR) and subsequent changes of the channel activity by impedance spectroscopy (IS). [on SciFinder (R)] ...
The pore-forming toxin aerolysin is secreted by Aeromonas hydrophila as an inactive precursor. Based on chemical cross-linking and gel filtration, we show here that proaerolysin exists as a monomer at low concentrations but is dimeric above 0.1 mg/ml. At i ...
G protein-coupled receptors (GPCRs) constitute an abundant family of membrane receptors of high pharmacol. interest. Cell-based assays are the predominant means of assessing GPCR activation, but are limited by their inherent complexity. Functional mol. ass ...
We have expressed the 5-HT3 receptor with two transient expression sytems: the Semliki Forest virus and the HEK293EBNA. Both systems allow the rapid expression of functional receptor protein at very high level: up to 107 receptors per cell. Large scale pro ...