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[A fluorometric method of determining cholesterol esterase activity]
Bioorganicheskaia Khimiia
|October 1, 1991
Summary
A new method accurately measures cholesterol esterase activity using a specific substrate, cholesteryl-o-coumarate. This simple assay allows for the quantification of enzyme levels in biological samples.
Area of Science:
- Biochemistry
- Enzymology
Context:
- Cholesterol esterase (EC 3.1.1.13) plays a crucial role in lipid metabolism.
- Accurate quantification of enzyme activity is essential for research and diagnostics.
Purpose:
- To develop a simple, highly specific, and sensitive method for estimating cholesterol esterase activity.
Summary:
- A novel assay utilizes cholesteryl-o-coumarate as an emulsified substrate for cholesterol esterase.
- Enzyme activity is determined by fluorimetric detection of the released o-coumaric acid at pH 10.4.
- The method demonstrates high specificity, as other enzymes like pancreatic lipase do not hydrolyze the substrate.
Impact:
- Enables precise measurement of approximately 1 microgram of pancreatic cholesterol esterase within 15 minutes.
- Provides a valuable tool for biochemical research and clinical diagnostics involving cholesterol metabolism.