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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

Tunable Activated Esters Enable Lysine-Selective Protein Labeling and Profiling.

Chuan Wan¹, Dongyan Yang², Yuhao An³

¹College of Health Science and Environmental Engineering, Shenzhen Technology University, 518118 Shenzhen, China.

Analytical Chemistry

|November 7, 2024

Summary

This summary is machine-generated.

Researchers developed new chemical probes to precisely label lysine residues on proteins, overcoming challenges from their varied reactivity. This enables better study of protein functions and undruggable targets.

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Last Updated: Jun 8, 2025

Specificity Analysis of Protein Lysine Methyltransferases Using SPOT Peptide Arrays

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Published on: November 29, 2014

A Facile Protocol to Generate Site-Specifically Acetylated Proteins in Escherichia Coli

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Quantitative Proteomics Using Reductive Dimethylation for Stable Isotope Labeling

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Published on: July 1, 2014

Area of Science:

Chemical Biology
Proteomics
Organic Synthesis

Background:

Lysine residues are crucial for protein function and drug targeting but exhibit diverse reactivity due to varied microenvironments.
Site-specific covalent modification of lysine is challenging, hindering the study of many proteins, including undruggable targets.

Purpose of the Study:

To design and develop novel chemical probes for selective lysine labeling within the proteome.
To overcome the challenges associated with the variable pKa values of lysine residues for targeted covalent binding.

Main Methods:

Modulation of amide reaction activity in heteroaromatic activated esters by altering heteroatom type, position, and number.
Systematic optimization of ester reactivity and selectivity for probe development.
Application of developed probes for in vitro and cellular lysine labeling and proteome profiling.

Main Results:

Successfully rationalized the regulation of amide reaction activity in heteroaromatic activated esters.
Designed and synthesized effective probes for selective lysine labeling.
Demonstrated the utility of these probes in both in vitro and cellular settings for protein analysis.

Conclusions:

The developed heteroaromatic activated esters provide a powerful tool for selective lysine labeling.
This approach enhances the ability to study protein function and mechanisms through precise labeling and profiling.
The findings offer new avenues for investigating undruggable proteins and advancing chemical biology research.