Organic phase separation opens up new opportunities to interrogate the RNA-binding proteome

Area of Science:

• Molecular Biology
• Biochemistry
• Genomics

Background:

• Protein-RNA interactions are fundamental to RNA metabolism and the function of ribonucleoproteins.
• Previous technologies for studying RNA-bound proteins were limited, often biased towards poly(A) RNA-binding proteins (RBPs) or requiring molecular labeling.

Purpose of the Study:

• To introduce and validate novel organic-aqueous phase separation-based methods for capturing RNA-bound proteins.
• To enable efficient enrichment and quantification of the complete suite of RNA-binding proteins (RBPs) and their associated RNA.
• To facilitate systems-level interrogation of protein-RNA interactions.

Main Methods:

• Utilized organic-aqueous phase separation techniques for protein-RNA complex enrichment.
• Developed methods for unbiased capture of the entire spectrum of RNA-binding proteins (RBPs).
• Enabled quantification of RNA-binding protein (RBP) dynamics in conjunction with their bound RNA.

Main Results:

• Demonstrated efficient enrichment of the complete suite of RNA-binding proteins (RBPs) using phase separation methods.
• Showcased the ability to quantify RNA-binding protein (RBP) dynamics and their associated RNA molecules.
• Overcame limitations of previous biased or labeling-dependent technologies.

Conclusions:

• Organic-aqueous phase separation methods provide a powerful and flexible approach to study protein-RNA interactions.
• These novel technologies significantly advance the field of RNA biology by enabling comprehensive analysis of RNA-binding proteins (RBPs).
• Opens new avenues for systems-level understanding of RNA metabolism and ribonucleoprotein function.