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Probing High-density Functional Protein Microarrays to Detect Protein-protein Interactions

Probing High-density Functional Protein Microarrays to Detect Protein-protein Interactions

Published on: August 2, 2015

Protein kinase substrate profiling with a high-density peptide microarray.

Xiaoming Han¹, Tatsuhiko Sonoda, Takeshi Mori

¹Graduate School of Life Science, Kyushu University, Japan.

Combinatorial Chemistry & High Throughput Screening

|July 10, 2010

Summary

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This study introduces a high-density peptide microarray for identifying protein kinase substrates. This powerful tool enables efficient discovery of novel substrates and phosphorylation motifs using fluorescence-based detection.

Area of Science:

Biochemistry
Molecular Biology
Proteomics

Background:

Protein kinases play crucial roles in cellular signaling pathways.
Identifying their substrates is essential for understanding cellular functions and disease mechanisms.
Current methods for substrate identification can be limited in throughput and scope.

Purpose of the Study:

To develop and validate a high-density peptide microarray for comprehensive profiling of protein kinase substrates.
To identify novel substrates and phosphorylation motifs for various protein kinases.
To establish a powerful platform for high-throughput substrate discovery.

Main Methods:

Chemoselective immobilization of over 290 Tyr peptides and 1,100 Ser/Thr peptides onto a glass surface.

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Last Updated: Jun 11, 2026

Probing High-density Functional Protein Microarrays to Detect Protein-protein Interactions

Probing High-density Functional Protein Microarrays to Detect Protein-protein Interactions

Published on: August 2, 2015

Kinase Inhibitor Screening In Self-assembled Human Protein Microarrays

Kinase Inhibitor Screening In Self-assembled Human Protein Microarrays

Published on: October 23, 2019

Specificity Analysis of Protein Lysine Methyltransferases Using SPOT Peptide Arrays

Specificity Analysis of Protein Lysine Methyltransferases Using SPOT Peptide Arrays

Published on: November 29, 2014

Utilizing fluorescence-labeled antiphosphotyrosine antibody for phosphotyrosine detection.

Employing biotinylated Phostag and fluorescence-labeled streptavidin for phosphoserine/threonine detection.

Profiling protein kinases including c-Src, c-Abl, EGFR, JNK1, ERK2, p38α, and PKA.

Main Results:

Successfully profiled a panel of protein kinases using the high-density peptide microarray.
Identified numerous novel, highly reactive, and specific peptide substrates for each kinase.
Discovered new phosphorylation motifs in addition to previously reported consensus motifs.
Designed peptides with higher reactivity than known substrates, highlighting the utility of amino acid bias analysis.

Conclusions:

The high-density peptide microarray is a powerful and efficient tool for discovering protein kinase substrates.
This platform facilitates high-throughput identification of novel substrates and phosphorylation patterns.
The findings contribute to a deeper understanding of kinase signaling and substrate recognition mechanisms.