Characterization of antibody-antigen interactions using biolayer interferometry

Area of Science:

• Biochemistry
• Immunology
• Biophysics

Background:

• Assessing molecular interactions is crucial in drug discovery and diagnostics.
• Label-free detection methods accelerate the study of biological interactions.
• Biolayer interferometry (BLI) offers a robust platform for real-time interaction analysis.

Purpose of the Study:

• To describe a protocol for utilizing biolayer interferometry.
• To focus on affinity determination and epitope binning of antibody-antigen interactions.
• To highlight the platform's utility for diverse protein-protein interaction studies.

Main Methods:

• Utilizing a biolayer interferometry platform for real-time data collection.
• Employing unlabeled molecules for interaction analysis.
• Implementing careful experimental design, including sensor selection and controls.

Main Results:

• Real-time readings enable fast and easy data acquisition.
• The protocol facilitates accurate affinity determination.
• Epitope binning experiments can be efficiently performed.

Conclusions:

• Biolayer interferometry provides a rapid and accessible method for studying protein-protein interactions.
• The described protocol allows for precise characterization of antibody-antigen binding kinetics.
• Careful experimental planning is essential for successful application of the BLI technique.