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Assessment of Resistance to Tyrosine Kinase Inhibitors by an Interrogation of Signal Transduction Pathways by Antibody Arrays

Assessment of Resistance to Tyrosine Kinase Inhibitors by an Interrogation of Signal Transduction Pathways by Antibody Arrays

Published on: September 19, 2018

Array-based fluorescence assay for serine/threonine kinases using specific chemical reaction.

Shoji Akita¹, Naoki Umezawa, Nobuki Kato

¹Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, Aichi 467-8603, Japan.

Bioorganic & Medicinal Chemistry

|July 29, 2008

Summary

This summary is machine-generated.

A new fluorescence assay detects serine/threonine kinase activity using a peptide array and specific chemical reactions. This method enables efficient detection of phosphorylated peptides and kinase inhibitor activity.

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Area of Science:

Biochemistry
Chemical Biology
Molecular Biology

Background:

Serine/threonine kinases play crucial roles in cellular signaling pathways.
Accurate detection of kinase activity is essential for understanding biological processes and disease mechanisms.

Purpose of the Study:

To develop an efficient and widely applicable fluorescence assay for detecting serine/threonine kinase activity.
To enable the detection and quantification of phosphorylated peptides using a novel chemical approach.

Main Methods:

Development of a fluorescence assay utilizing a peptide array.
Employing base-mediated beta-elimination of phosphate groups from phosphoserine and phosphothreonine residues.
Utilizing Michael addition with thiol-containing fluorescent reagents for covalent labeling of phosphorylated peptides.

Main Results:

Successful design and synthesis of novel fluorescent reagents.
Efficient detection of protein kinase A (PKA) and Akt-1 activities.
Demonstration of the assay's utility in measuring kinase inhibitor efficacy.

Conclusions:

The developed fluorescence assay provides an efficient method for detecting serine/threonine kinase activity.
This assay enables covalent fluorescent labeling of phosphorylated peptides.
The assay is expected to be broadly applicable in kinase research and drug discovery.