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Enzyme kinetics by real-time quantitative NMR (qNMR) spectroscopy with progress curve analysis
Justin Y Vang1, Candido Breceda1, Cheenou Her1
1Department of Chemistry & Biochemistry, California State University, Fresno, CA, 93740, USA.
Analytical Biochemistry
|September 26, 2022
Summary
Quantitative nuclear magnetic resonance (qNMR) combined with progress curve analysis offers a powerful method for determining enzyme kinetics. This approach utilizes the Lambert-W function for efficient analysis of real-time enzymatic conversion data.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Spectroscopy
Background:
- Enzyme kinetics are crucial for understanding biological processes and drug development.
- Traditional methods for determining enzyme kinetic parameters can be time-consuming and require multiple experiments.
- Quantitative nuclear magnetic resonance (qNMR) spectroscopy provides a non-invasive method for real-time monitoring of biochemical reactions.
Purpose of the Study:
- To review the integration of quantitative nuclear magnetic resonance (qNMR) spectroscopy with progress curve analysis for enzyme kinetics.
- To demonstrate the utility of the Lambert-W function for analyzing qNMR data to determine kinetic parameters.
- To highlight the broad applicability of this combined approach across various enzymatic systems.
Main Methods:
- Utilizing quantitative nuclear magnetic resonance (qNMR) spectroscopy to collect real-time spectral data of enzymatic conversions.
- Applying progress curve analysis, specifically the Lambert-W function, to model substrate and product kinetics.
- Analyzing experimental data from acetylcholinesterase, β-Galactosidase, and invertase enzymatic reactions.
Main Results:
- The Lambert-W function accurately estimates Michaelis-Menten constant (KM) and maximum velocity (Vmax) from single qNMR experiments.
- Demonstrated successful application in determining kinetic parameters for acetylcholinesterase, β-Galactosidase, and invertase.
- Showcased the inhibitory effect of sucralose on invertase activity using this methodology.
Conclusions:
- The combination of qNMR and progress curve analysis provides an efficient and accurate method for enzyme kinetic studies.
- This NMR-based approach is suitable for a wide range of enzymatic systems and can be applied in both academic and industrial settings.
- Advancements in NMR technology, such as dynamic nuclear polarization, further enhance the potential of this valuable tool for enzyme kinetics.
Keywords:
AcetylcholinesteraseEnzyme kineticsInvertaseNuclear magnetic resonance (NMR)Progress curve analysisβ-GalactosidaseMore Related Videos
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