Mass spectrometry-based characterization of histone post-translational modification

Area of Science:

• Epigenetics and Molecular Biology
• Proteomics and Mass Spectrometry

Background:

• Histone post-translational modifications (PTMs) are crucial for chromatin dynamics and gene expression.
• Dysregulation of histone PTMs is linked to various diseases.
• Conventional detection methods like western blot (WB) and ChIP-seq have limitations.

Purpose of the Study:

• To review advanced mass spectrometry (MS)-based strategies for comprehensive histone PTM characterization.
• To highlight MS as a powerful, unbiased alternative to traditional methods.
• To discuss the application of MS in identifying both classical and novel histone modifications.

Main Methods:

• Histone extraction and enzymatic digestion.
• Chemical labeling and enrichment techniques.
• Advanced MS-based detection and quantitative analysis.

Main Results:

• MS enables comprehensive identification and quantification of histone acetylation and methylation.
• MS facilitates the discovery of less-characterized PTMs like succinylation, lactylation, crotonylation, and monoaminylation.
• These findings reveal greater complexity in the histone code.

Conclusions:

• MS-based proteomics significantly advances the understanding of histone PTM landscapes.
• These approaches provide insights into epigenetic regulatory mechanisms in physiological and pathological conditions.
• MS is a key technology for exploring the full spectrum of histone modifications and their roles.