Quantitative Microplate Assay for Real-Time Nuclease Kinetics.

Area of Science:

• Biochemistry
• Enzymology
• Molecular Biology

Background:

• Nuclease activity is crucial in various biological processes and disease states.
• Accurate kinetic analysis of nucleases is essential for understanding their function and for drug development.
• Existing methods for nuclease activity measurement can be complex or lack sensitivity.

Purpose of the Study:

• To develop a novel, quantitative, and real-time assay for measuring nuclease catalysis kinetics.
• To demonstrate the assay's versatility for studying multiple turnover, label-free nuclease reactions.

Main Methods:

• The assay leverages the enzymatic activity of nucleases to expose oligonucleotide phosphate backbones.
• Released inorganic phosphate is subsequently quantified in real-time using a fluorescent phosphate sensor.
• The method was validated using two distinct nuclease enzymes.

Main Results:

• The developed assay successfully quantified inorganic phosphate released during nuclease catalysis.
• Real-time monitoring enabled precise kinetic measurements of nuclease activity.
• The assay demonstrated versatility by accurately assessing two different nucleases.

Conclusions:

• A novel, sensitive, and versatile fluorescent assay for quantitative, real-time measurement of nuclease kinetics has been established.
• This label-free method is suitable for multiple turnover studies and can be applied to various nucleases.
• The assay provides a valuable tool for biochemical and enzymatic research involving nucleases.