Compositions and assays utilizing ADP or phosphate for detecting protein modulators
First Claim
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1. A high throughput assay method of identifying a candidate agent as a modulator of the function of a target protein wherein said method comprises:
- a) adding a candidate agent to a mixture comprising a target protein which directly or indirectly produces ADP or phosphate under conditions which normally allow the production of ADP or phosphate;
b) subjecting the mixture to an enzymatic reaction which uses said ADP or phosphate as a substrate under conditions which normally allow the ADP or phosphate to be utilized; and
c) determining the level of activity of the enzymatic reaction wherein a change in said level between the presence and absence of said candidate agent indicates that said candidate agent is a modulator of said target protein function, wherein at least 1,000 assays and up to about 10,000 assays can be performed per hour and said assays are performed in microtiter plates having 96 wells or more.
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Abstract
Described herein are methods which identify candidate agents as binding to a protein or as a modulator of the binding characteristics or biological activity of a protein. Generally, the methods involve the use of ADP or phosphate. The assays can be used in a high throughput system to obviate the cumbersome steps of using gels or radioactive materials.
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Citations
16 Claims
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1. A high throughput assay method of identifying a candidate agent as a modulator of the function of a target protein wherein said method comprises:
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a) adding a candidate agent to a mixture comprising a target protein which directly or indirectly produces ADP or phosphate under conditions which normally allow the production of ADP or phosphate; b) subjecting the mixture to an enzymatic reaction which uses said ADP or phosphate as a substrate under conditions which normally allow the ADP or phosphate to be utilized; and c) determining the level of activity of the enzymatic reaction wherein a change in said level between the presence and absence of said candidate agent indicates that said candidate agent is a modulator of said target protein function, wherein at least 1,000 assays and up to about 10,000 assays can be performed per hour and said assays are performed in microtiter plates having 96 wells or more. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A high throughput assay method of identifying a candidate agent as a modulator of the function of a target protein wherein said method comprises:
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a) adding a candidate agent to a mixture comprising a target protein which directly or indirectly produces ADP or phosphate under conditions which normally allow the production of ADP or phosphate; b) subjecting the mixture to an enzymatic reaction which uses said ADP or phosphate as a substrate under conditions which normally allow the ADP or phosphate to be utilized wherein said enzymatic reaction comprises a purine nucleoside phosphorylase and a purine analog; and c) determining cleavage of the purine analog in the presence and absence of said candidate agent as a measure of phosphate production wherein a change in cleavage of the purine analog between the presence and absence of said candidate agent indicates that said candidate agent is a modulator of said target protein function, wherein at least 1,000 assays and up to about 10,000 assays can be performed per hour and the assays are performed in microtiter plates having 96 wells or more. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification