A method to determine the mode of binding for GCPII inhibitors using bio-layer interferometry

Area of Science:

• Biochemistry
• Enzyme kinetics
• Biophysical techniques

Background:

• The enzyme-inhibitor complex assay is standard for determining inhibition reversibility.
• Glutamate carboxypeptidase II (GCPII) inhibitors are a focus of research.
• Traditional assays for inhibitor reversibility are time-consuming.

Purpose of the Study:

• To develop a facile and rapid method for assessing the reversibility of enzyme inhibitors.
• To establish a real-time bio-layer interferometry (BLI) assay for inhibitor reversibility.
• To validate the BLI method against established techniques for GCPII inhibitors.

Main Methods:

• Utilized bio-layer interferometry (BLI) for real-time monitoring of enzyme activity recovery.
• Employed well-characterized glutamate carboxypeptidase II (GCPII) inhibitors.
• Compared BLI results with the established rapid dilution assay.

Main Results:

• A novel, rapid, real-time BLI method for determining inhibitor reversibility was successfully developed.
• The BLI assay demonstrated agreement with the results obtained from the traditional rapid dilution method.
• This method offers a more efficient alternative for assessing enzyme inhibitor reversibility.

Conclusions:

• Bio-layer interferometry provides a rapid and reliable method for assessing enzyme inhibitor reversibility.
• The developed BLI assay is a valuable tool for studying enzyme-inhibitor interactions, particularly for GCPII.
• This technique streamlines the process of determining inhibition reversibility, saving time and resources.