A Simple Method to Study ADP-Ribosylation Reversal: From Function to Drug Discovery

Area of Science:

• Biochemistry
• Molecular Biology
• Enzymology

Background:

• ADP-ribosylation is a crucial post-translational modification regulating vital cellular processes like stress response and immunity.
• Dysregulation of ADP-ribosylation is implicated in various diseases, and targeting its enzymes offers therapeutic potential.
• Current limitations in high-throughput assays hinder the study of ADP-ribosylation enzymes ('writers' and 'erasers') and drug screening.

Purpose of the Study:

• To develop a scalable and versatile method for measuring (ADP-ribosyl)hydrolase activity.
• To facilitate the screening of potential inhibitors for ADP-ribosylation-modulating enzymes.
• To enable biochemical characterization of enzymes involved in ADP-ribosylation processing.

Main Methods:

• A novel assay quantifies (ADP-ribosyl)hydrolase activity.
• The method utilizes the conversion of ADP-ribose to AMP by NudT5 phosphodiesterase.
• Bioluminescence detection via a commercial assay kit measures AMP production.

Main Results:

• The assay is scalable and adaptable for measuring (ADP-ribosyl)hydrolase activity.
• It enables the study of nudix and ENPP-type phosphodiesterases in ADP-ribosylation.
• The method can be adapted to investigate (ADP-ribosyl)transferase activity.

Conclusions:

• A simple, high-throughput assay for ADP-ribosylation enzyme activity has been established.
• This method supports basic research and drug discovery efforts targeting ADP-ribosylation.
• The assay's adaptability makes it valuable for diverse biochemical and screening applications.