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Related Experiment Videos

A multiplexed protein kinase assay.

Melissa D Shults1, Igor A Kozlov, Nicholas Nelson

  • 1Illumina Inc, San Diego, CA 92121-1975, USA.

Chembiochem : a European Journal of Chemical Biology
|May 2, 2007
PubMed
Summary
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This study introduces a new high-throughput protein kinase assay. The novel method uses tagged peptide substrates and microarrays to identify kinase activity and inhibition in complex mixtures.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Assay Development

Background:

  • Protein kinases are crucial enzymes involved in cellular signaling.
  • Accurate detection and characterization of kinase activity are essential for biological research and drug discovery.
  • Existing methods for kinase profiling can be limited in throughput and complexity handling.

Purpose of the Study:

  • To develop a novel, high-throughput assay for detecting and characterizing protein kinase activity in complex biological samples.
  • To enable the simultaneous analysis of multiple kinases and their substrate specificities.
  • To facilitate the screening of enzyme inhibitors based on kinase activity signatures.

Main Methods:

  • A solution-phase phosphorylation reaction using 900 distinct peptide substrates, each tagged with a unique oligonucleotide.

Related Experiment Videos

  • Chemical labeling of phosphorylated amino acids (phosphoserine, phosphothreonine, phosphotyrosine).
  • Hybridization of tagged substrates to a complementary oligonucleotide microarray for readout of phosphorylation states.

    • Main Results:

    • Successfully determined unique phosphorylation activity signatures for 26 purified protein kinases.
    • Demonstrated the capability of the assay to screen enzyme mixtures for kinase activity.
    • Showcased the utility of the assay in evaluating the selectivity of kinase inhibitors.

    Conclusions:

    • The developed protein kinase assay offers a powerful tool for high-throughput profiling of kinase activity.
    • This method allows for the characterization of individual kinases and the analysis of complex enzyme mixtures.
    • The assay has significant potential for applications in drug discovery and understanding kinase-mediated biological processes.