Protocol for synthesizing and purifying short-length poly(ADP)ribose polymer using fast protein liquid chromatography

Area of Science:

• Biochemistry
• Molecular Biology
• Chromatography

Background:

• Poly(ADP)ribose (PAR) is a crucial post-translational modification involved in DNA repair and other cellular processes.
• Existing methods for PAR synthesis and purification are often complex, hazardous, or yield heterogeneous products.

Purpose of the Study:

• To present a streamlined, cost-effective, and safe protocol for synthesizing and purifying short-length poly(ADP)ribose (PAR) polymers.
• To enable broader accessibility of homogenous PAR chains for biophysical and structural studies.

Main Methods:

• Protein expression and purification.
• In vitro synthesis of PAR polymers.
• Purification and fractionation using fast protein liquid chromatography (FPLC).
• Visualization of synthesized PAR chains.

Main Results:

• High-yield synthesis of short-length PAR polymers (under 10 units).
• Homogenous PAR chains achieved through FPLC purification.
• Protocol avoids radiolabeled substrates, hazardous reagents, and specialized equipment.
• Eliminates the need for enzymes like PARG and SVP.

Conclusions:

• The developed FPLC-based protocol offers a simplified, safe, and efficient method for PAR polymer production.
• This accessible approach facilitates further biophysical and structural investigations of PAR.
• The protocol democratizes PAR research by reducing cost and complexity.