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Identification of Novel CK2 Kinase Substrates Using a Versatile Biochemical Approach
Published on: February 21, 2019
Global identification of protein kinase substrates by protein microarray analysis
Janine Mok1, Hogune Im, Michael Snyder
1Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut, USA.
Nature Protocols
|December 17, 2009
Summary
This study introduces a protein microarray method for globally identifying protein kinase substrates. The technique rapidly determines kinase-substrate relationships across entire proteomes, adaptable from yeast to higher eukaryotes.
Area of Science:
- Biochemistry
- Molecular Biology
- Proteomics
Background:
- Protein kinases play crucial roles in cellular signaling.
- Identifying kinase substrates is essential for understanding cellular processes.
- Existing methods for substrate identification can be low-throughput.
Purpose of the Study:
- To develop a high-throughput method for identifying protein kinase substrates.
- To enable global determination of kinase-substrate relationships.
- To adapt the method for various eukaryotic systems.
Main Methods:
- Utilized protein microarray technology with purified, tagged fusion proteins.
- Incubated arrays with purified kinase and radiolabeled ATP.
- Analyzed phosphorylation via autoradiography and quantified substrate phosphorylation.
Main Results:
- Developed a protocol for reproducible identification of kinase substrates.
- Successfully adapted the method from yeast to higher eukaryotes.
- Demonstrated rapid determination of kinase-substrate interactions.
Conclusions:
- Protein microarrays offer a powerful tool for proteome-wide kinase substrate discovery.
- The described protocol is efficient and adaptable for diverse biological systems.
- This technology accelerates the understanding of kinase-mediated signaling pathways.
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