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Published on: January 16, 2019
Enzyme kinetics and hit validation in fluorimetric protease assays
Stephanie Ludewig1, Markus Kossner, Markus Schiller
1Institute of Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, D 97074 Wuerzburg, Germany. s.ludewig@tu-bs.de
Current Topics in Medicinal Chemistry
|February 20, 2010
Summary
Determining enzyme inhibitor potency requires understanding the inhibition mode. This review covers kinetic methods and common pitfalls, including signal attenuation, aggregation, and irreversible binding, to ensure accurate enzyme inhibition assays.
Area of Science:
- Biochemistry
- Enzymology
- Pharmacology
Background:
- Fluorimetric assays are widely used for determining enzyme inhibitor potency.
- Accurate assessment of enzyme inhibitors necessitates understanding their specific mode of inhibition.
- Enzyme activity can be modulated through various inhibition mechanisms.
Purpose of the Study:
- To review kinetic methods for distinguishing different enzyme inhibition modes.
- To identify and discuss potential pitfalls in enzyme inhibition assays.
- To present techniques for hit validation and scrutinize common error sources in protease assays.
Main Methods:
- Kinetic analysis to differentiate inhibition mechanisms.
- Experimental validation of enzyme inhibitor activity.
- Investigation of signal attenuation, molecular aggregation, and irreversible binding in protease assays.
Main Results:
- Kinetic methods provide a framework for classifying enzyme inhibition.
- Three primary error sources can lead to falsely potent inhibitor identification: signal attenuation, aggregation, and irreversible binding.
- A protocol is proposed to detect these common assay problems.
Conclusions:
- Thorough investigation of inhibition mode is crucial for reliable enzyme inhibitor characterization.
- Awareness and detection of assay artifacts are essential for validating enzyme inhibitors.
- The proposed protocol aids in ensuring the accuracy of fluorimetric enzyme inhibition studies.
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