Lysine Acetylation Stoichiometry Analysis at the Proteome Level

Area of Science:

• Biochemistry
• Proteomics
• Molecular Biology

Background:

• Lysine acetylation is a crucial posttranslational modification (PTM) found in all living organisms.
• It plays a vital role in regulating numerous biological pathways, affecting a wide range of proteins.
• Enzymes like lysine acetyltransferases and lysine deacetylases control this reversible modification, and their dysregulation is linked to human diseases.

Purpose of the Study:

• To develop and present a novel method for identifying lysine acetylation sites.
• To enable the quantitative estimation of lysine acetylation site occupancy at the proteome-wide scale.
• To validate the method's applicability across diverse sample types, including FFPE tissues.

Main Methods:

• Utilizes a high-resolution mass spectrometry-based proteomics approach.
• Incorporates a chemical acetylation reaction using heavy isotopes on unmodified lysine residues.
• The method is designed for proteome-scale analysis.

Main Results:

• Successfully identifies lysine acetylation sites.
• Enables accurate estimation of site occupancy.
• Demonstrates applicability to cell cultures and both snap-frozen and FFPE clinical samples.

Conclusions:

• The described method provides a robust approach for quantifying lysine acetylation at the proteome scale.
• This technique is valuable for studying the role of lysine acetylation in health and disease.
• Its adaptability to FFPE tissues expands its utility in clinical research.