Integrative Proteomic Analysis of Multiple Posttranslational Modifications in Inflammatory Response

Area of Science:

• Immunology
• Proteomics
• Molecular Biology

Background:

• Posttranslational modifications (PTMs) are vital for innate immunity.
• Acetylation, phosphorylation, and ubiquitination are key PTMs with complex, dynamic interplay.
• Understanding PTM crosstalk is essential for dissecting inflammatory pathways.

Purpose of the Study:

• To construct a dynamic network of inflammation-related proteins.
• To identify PTM crosstalk within and between proteins in the inflammatory response.
• To elucidate the roles of known and discover novel inflammatory proteins.

Main Methods:

• Integrated proteomic data (whole-cell proteome, acetylome, phosphoproteome, ubiquitinome) from human and mouse macrophages.
• Analyzed PTM sites to identify crosstalk.
• Stimulated macrophages with lipopolysaccharide (LPS) to observe ubiquitination patterns.

Main Results:

• Generated comprehensive datasets for acetylation, phosphorylation, and ubiquitination sites.
• Identified significant PTM crosstalk in inflammation-related proteins.
• Observed both degradative and non-degradative ubiquitination upon LPS stimulation.

Conclusions:

• The study provides a dynamic network of inflammation-related proteins and their PTMs.
• PTM crosstalk is a critical feature of the inflammatory response.
• This work enhances understanding of inflammatory molecules and identifies potential new targets.