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Kinase assay based on thiophosphorylation and biotinylation
1Caliper Technologies, Mountain View, CA, USA.
Biotechniques
|January 13, 2000
Summary
We developed a new assay to detect protein kinase activity using ATPγS and biotinylation. This homogeneous method enables high-throughput screening for novel kinase inhibitors without separation steps.
Area of Science:
- Biochemistry
- Enzymology
- Molecular Biology
Background:
- Protein kinases are crucial enzymes in cellular signal transduction.
- Developing novel inhibitors for protein kinases is essential for therapeutic research.
- High-throughput screening (HTS) methods are needed to identify kinase inhibitors efficiently.
Purpose of the Study:
- To present a novel, homogeneous assay for detecting protein kinase activity.
- To enable high-throughput screening of chemical libraries for kinase inhibitors.
- To demonstrate the utility of the assay in detecting kinase inhibitors.
Main Methods:
- Utilized adenosine triphosphate gamma S (ATPγS) instead of ATP in kinase reactions.
- Employed a fluorescein-labeled peptide substrate and a sulfur-reactive biotinylation reagent.
- Detected thiophosphorylated, biotinylated substrate via streptavidin binding and fluorescence polarization.
- Developed a homogeneous assay requiring no separation steps.
Main Results:
- Successfully detected protein kinase activity using the novel ATPγS-based method.
- Demonstrated the capability of the assay to identify kinase inhibitors.
- The assay is homogeneous and suitable for high-throughput screening.
Conclusions:
- The developed assay provides a novel and efficient approach for measuring protein kinase activity.
- This method facilitates high-throughput screening for potential kinase inhibitors.
- The assay's homogeneous nature and lack of separation steps enhance its applicability in drug discovery.