PPIXpress and PPICompare webservers infer condition-specific and differential PPI networks

Area of Science:

• Bioinformatics
• Systems Biology
• Computational Biology

Background:

• Protein-protein interaction networks (PPINs) are crucial for cellular functions.
• Analyzing dynamic changes in PPINs across different biological contexts is challenging.

Purpose of the Study:

• To introduce PPIXpress and PPICompare, two webservers for analyzing protein-protein interaction networks.
• To enable the construction of context-dependent and differential PPINs.
• To facilitate the identification of altered protein interactions in specific cellular conditions.

Main Methods:

• PPIXpress constructs context-dependent PPINs using expression data and high-confidence domain interactions.
• PPICompare identifies statistically significant altered interactions between context-dependent PPINs.
• A case study involved analyzing PPINs for melanocytic nevi and primary melanoma cells.

Main Results:

• PPIXpress and PPICompare provide a framework for analyzing context-specific PPINs.
• The webservers successfully identified differential protein interactions between sample types.
• The case study demonstrated the utility of the tools in detecting rewiring in melanoma cells.

Conclusions:

• PPIXpress and PPICompare are valuable webservers for dissecting protein-protein interaction network alterations.
• These tools can enhance the understanding of biological processes and disease mechanisms.
• The webservers offer accessible platforms for researchers studying dynamic PPINs.