摘要:
This invention provides bioluminescence resonance energy transfer (BRET) system that comprises four parts: 1) a bioluminescent protein that has luciferase activity; 2) an acceptor fluorophore that can accept the energy from the bioluminescent protein when they are associated, in the presence of the appropriate substrate; 3) a modulator that influences the proximity or the orientation of the bioluminescent protein and the fluorophore, and 4) an appropriate substrate to activate the luciferase activity of the bioluminescent protein. The components of this system interact to influence the spatial relationship between the bioluminescent protein and the fluorophore, that is demonstrated by the light emission from the system. The modulator can be a single entity, covalently attached to both the bioluminescent protein and the fluorophore, it can be two separate entities, each linked covalently to either the bioluminescent protein or the fluorophore, or an alternative configuration that falls within the scope of the invention. Thissystem can be used in both in vivo or in vitro assays to detect molecular changes in a wide variety of applications, and is amenable to automation. In particular, it is useful for assaying protein interactions, enzyme activities and the concentration of analytes or signaling molecules in cells or in solution.
摘要:
This invention relates to peptides and peptidomimetic compounds that modulate the function of G-protein-coupled receptors by affecting the ratio of receptor monomer to homo-oligomeric forms. Novel short peptides of a preferred length of up to about 15-20 amino acid residues are modeled on transmembrane domains of G-protein-coupled receptors, whose activities are affected by the formation of oligomers. These novel peptides and peptidomimetic compounds can be used to selectively affect the activity of G-protein-coupling receptors, thereby functioning as potential therapeutic drugs, etc.. A preferred peptide is GIIMGTFTLCWLPFFIVNIV.
摘要:
Luminescence assays and compositions for assay of biomolecular interaction and activity and detection of modulators of biomolecular interaction and activity are provided. Technology described herein has utility in a variety of assay formats and types, for example, simultaneous monitoring multiple parameters which affect interaction and activity of biological molecules. Compositions and methods are provided herein which include a first solid-phase support associated with a first specific binding agent and a photosensitizer,; a second solid-phase support associated with a second specific binding agent and a first emission system; and a third solid- phase support associated with a third specific binding agent and a second emission system.
摘要:
This invention is a new method of assaying compounds that modulate the activity of G protein-coupled receptors based on measurement of changes in the relative proportions of monomeric to multimeric receptor polypeptides. More specifically, techniques are described herein which permit the prediction of the pharmacological efficacy of drug candidates based solely on the ability of the candidate compounds to alter the ratio of receptor monomer to homo-oligomeric forms of the receptor. This method provides a novel means of assaying compounds as potential therapeutic drugs at G protein-coupled receptors which is greatly simplified and more generally applicable than existing methods.
摘要:
Methods for determining the presence or absence of a plurality of analytes in a sample with dual-acceptor time-resolved fluorescence resonance energy transfer are provided.
摘要:
The present invention provides a bioluminescence resonance energy transfer (BRET) detection system characterised by a broad spectral resolution between donor and acceptor emission wavelengths. The broad spectral resolution between the emission wavelength of the bioluminescent donor protein and the fluorescent acceptor molecule results in an increased signal-to-base ratio and dynamic range in comparison with a basic BRET system.
摘要:
Methods for determining the presence or absence of a plurality of analytes in a sample with dual-acceptor time-resolved fluorescence resonance energy transfer are provided.