Related Experiment Video
Updated: Jul 28, 2026
09:35
Real Time Measurements of Membrane Protein:Receptor Interactions Using Surface Plasmon Resonance (SPR)
Published on: November 29, 2014
Real-time analysis of immunogen complex reaction kinetics using surface plasmon resonance
Y Y Yu1, B J Van Wie, A R Koch
1Department of Chemical Engineering, Washington State University, Pullman, Washington 99164, USA.
Analytical Biochemistry
|November 4, 1998
Summary
This study validates a biosensor design using real-time analysis of biomolecular interactions. The biosensor detects cardiac troponin I (TnI) and nicotinic acetylcholine receptors (nAChRs) through competitive binding reactions.
Area of Science:
- Biochemistry
- Biosensor Technology
- Immunology
Background:
- Biosensors are crucial for detecting biomarkers.
- Real-time analysis of biomolecular interactions provides insights into sensor performance.
- Understanding competitive binding reactions is key to biosensor design.
Purpose of the Study:
- To qualitatively verify a biosensor design based on competitive binding reactions.
- To analyze real-time biospecific interactions involving cardiac troponin I (TnI) and nicotinic acetylcholine receptors (nAChRs).
- To assess the kinetic properties of various antibody-antigen and antibody-receptor complexes.
Main Methods:
- Utilized BIAcore for real-time measurement of biospecific interactions.
- Immobilized TnI via covalent amine coupling on a CM5 sensor chip.
- Immobilized nAChRs noncovalently on an HPA sensor chip via hydrophobic adsorption.
- Calculated kinetic rate constants and affinities from BIAcore sensorgrams.
Main Results:
- Demonstrated successful immobilization of TnI and nAChRs while maintaining epitope accessibility.
- Quantified kinetic rate constants and affinities for multiple complex formations.
- Identified dissociation rate constants of the order of 10(-2) s-1 for specific complexes, enabling competitive binding.
Conclusions:
- The biosensor design, relying on competitive binding, was qualitatively verified.
- The characterized kinetic properties support the potential for competitive analyte binding in sensing applications.
- This work provides a foundation for developing advanced biosensing systems for cardiac and neurological targets.
