Systems-level analyses of protein-protein interaction network dysfunctions via epichaperomics identify...

Area of Science:

• Biochemistry and Molecular Biology
• Systems Biology
• Chemical Biology

Background:

• Systems-level assessment of protein-protein interaction (PPI) network dysfunctions is limited by a lack of methods for proteome-wide analysis in native cells.
• Context-specific PPI changes are crucial for understanding disease mechanisms but are difficult to study comprehensively.
• Existing approaches do not adequately capture the dynamic and context-dependent nature of PPI networks.

Purpose of the Study:

• To develop a novel platform for identifying and analyzing disease-associated PPI alterations at the proteome-wide level.
• To investigate PPI network dysfunctions in cancer cells using a systems-level approach.
• To explore the therapeutic potential of targeting epichaperomes for normalizing aberrant PPI networks.

Main Methods:

• Development of an epichaperome-based 'omics platform (epichaperomics) utilizing chemical binders of epichaperomes.
• Biochemical and functional analyses to validate the utility of epichaperomics for PPI alteration studies.
• Application of epichaperomics to cancer cells to gain systems-level insights into PPI dysfunctions.

Main Results:

• Epichaperomics successfully identifies and analyzes context-specific PPI alterations in disease.
• Demonstrated the importance of epichaperome binders in revealing mechanistically and therapeutically relevant proteome-wide insights.
• Discovered a cancer-specific mechanism involving enhanced mitotic protein network fitness.

Conclusions:

• Epichaperomics provides a powerful tool for systems-level investigation of PPI network dysfunctions.
• The findings highlight the role of epichaperomes in disease pathogenesis, particularly in cancer.
• Epichaperome chemical binders represent a promising therapeutic strategy for normalizing disease-associated PPI networks.