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Measuring Enzymatic Stability by Isothermal Titration Calorimetry
Published on: March 26, 2019
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Measuring Enzymatic Stability by Isothermal Titration Calorimetry
W K Dindi Chan1, Marco Mason1, Lee D Hansen2
1Department of Nutrition, Dietetics and Food Science, Brigham Young University.
Journal of Visualized Experiments : Jove
|April 16, 2019
Summary
This study introduces a novel method using isothermal titration calorimetry (ITC) to measure enzyme stability. The technique offers an autonomous assay for assessing enzyme activity over time with minimal personnel involvement.
Area of Science:
- Biochemistry
- Enzyme kinetics
- Biophysical chemistry
Background:
- Enzyme stability is crucial for various biotechnological applications.
- Accurate and efficient methods for assessing enzyme stability are needed.
- Traditional methods can be time-consuming and labor-intensive.
Purpose of the Study:
- To develop a novel, autonomous method for measuring enzyme activity stability.
- To utilize isothermal titration calorimetry (ITC) for enzyme stability assessment.
- To establish a correlation between heat rate and enzyme activity.
Main Methods:
- Enzyme activity was measured using isothermal titration calorimetry (ITC).
- The peak heat rate after substrate injection into enzyme solution was recorded.
- Enzyme activity loss was monitored through multiple substrate injections over time.
Main Results:
- A direct correlation was established between peak heat rate and enzyme activity.
- The method successfully demonstrated the loss of enzyme activity over time.
- The assay proved to be autonomous and required minimal personnel time.
Conclusions:
- Isothermal titration calorimetry (ITC) provides a robust method for measuring enzyme stability.
- This new assay is applicable across diverse media and enzyme types.
- The autonomous nature of the assay enhances its practicality in research and industry.
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