Enzymes in the Cholesterol Synthesis Pathway: Interactomics in the Cancer Context

Area of Science:

• Biochemistry
• Molecular Biology
• Bioinformatics

Background:

• Protein-protein interactions are vital for cellular processes, but disruptions can lead to disease.
• Cholesterol biosynthesis enzymes are frequently deregulated in cancer, causing pathological cholesterol accumulation.
• Understanding these interactions is key to identifying cancer risk factors and therapeutic targets.

Purpose of the Study:

• To systematically analyze and bioinformatically assess protein interaction data for seventeen key enzymes in the cholesterol biosynthesis pathway.
• To identify protein partners of these enzymes and investigate their potential roles in cancer.

Main Methods:

• Systematic retrieval and analysis of interactomics data from multiple databases for 17 cholesterol pathway genes.
• Identification of unique and common protein partners, including modifying enzymes like kinases and ligases.
• Literature review, enrichment analysis, and gene co-expression analysis to link partners to cancer hallmarks and pathways.

Main Results:

• Identified 165 unique and 21 common protein partners interacting with cholesterol biosynthesis enzymes.
• Found 47 modifying proteins (kinases, phosphatases, ligases, deubiquitinases) among the partners.
• Approximately 25% of identified partners are associated with cancer hallmarks and pathways.

Conclusions:

• The study updates the understanding of protein interactions and regulatory mechanisms of cholesterol synthesis enzymes.
• Identified sub-interactomes suggest potential involvement of cholesterol pathway enzymes in cancer.
• These findings can guide the prioritization of protein targets for future drug development in oncology.