US 6,569,631 B1Granted

Microplate thermal shift assay for ligand development using 5-(4″dimethylaminophenyl)-2-(4′-phenyl)oxazole derivative fluorescent dyes

Assignee3-Dimensional Pharmaceuticals, Inc.

InventorsMichael W. Pantoliano, Eugenio C. Petrella, F. Raymond Salemme, Barry A. Springer

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Abstract

The present invention provides a method for ranking the affinity of each of a multiplicity of different molecules for a target molecule which is capable of unfolding due to a thermal change. The method comprises (a) contacting the target molecule with one molecule of a multiplicity of different molecules, in the presence of a 5-(4″-dimethylaminopheny-2-(4′-phenyl)oxazole derivative dye, in each of a multiplicity of containers; (b) simultaneously heating the multiplicity of containers; (c) measuring the fluorescence in each of the containers; (d) generating thermal unfolding information for the target molecule as a function of temperature for each of the containers; (e) comparing the thermal unfolding information obtained for each of the containers to the thermal unfolding information for the target molecule in the absence of any of the molecules in the multiplicity of different molecules; and (f) ranking the affinities of each of the molecules according to the difference in the thermal unfolding information between the target molecule in each of the containers and the target molecule in the absence of any of the molecules in the multiplicity of different molecules.

Claims12

Dependent claims

A method for ranking the affinity of each of a multiplicity of different molecules for a target molecule which is capable of unfolding due to a thermal change, said method comprising

(a) contacting the target molecule with one molecule of a multiplicity of different molecules, in the presence of a 5-(4″-dimethylaminophenyl)-2-(4′-phenyl)oxazole derivative dye, in each of a multiplicity of containers;
(b) simultaneously heating said multiplicity of containers;
(c) measuring the fluorescence in each of said containers;
(d) generating thermal unfolding information for the target molecule as a function of temperature for each of said containers;
(e) comparing the thermal unfolding information obtained for each of said containers to (i) the thermal unfolding information obtained for each of the other containers, and (ii) the thermal unfolding information obtained for the target molecule in the absence of any of said molecules in said multiplicity of different molecules;
and
(f) ranking the affinities of each of said molecules according to the difference in said thermal unfolding information between the target molecule in each of said containers and the target molecule in the absence of any of said molecules in the multiplicity of different molecules.

4 more elements

Dependencies are inferred from the claim text.