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A microplate assay specific for the enzyme aggrecanase
Jeffery A Miller1, Rui-Qin Liu, Gary L Davis
1The Bristol-Myers Squibb Company Pharmaceutical Research Institute, Experimental Station, Route 141 and Henry Clay Road, Wilmington, DE 19880, USA.
Analytical Biochemistry
|March 26, 2003
Summary
Researchers developed a specific assay for aggrecanase activity using a biotinylated peptide substrate. This high-throughput screening method enables the discovery of aggrecanase inhibitors.
Area of Science:
- Biochemistry
- Enzymology
- Drug Discovery
Background:
- Aggrecanases are key enzymes involved in cartilage degradation.
- Specific and sensitive assays are needed to study aggrecanase activity and develop inhibitors.
Purpose of the Study:
- To develop a novel, high-throughput assay for aggrecanase activity.
- To identify a specific substrate for aggrecanase enzyme family.
- To facilitate the discovery of aggrecanase inhibitors.
Main Methods:
- Identification and biotinylation of a 41-residue aggrecan peptide substrate.
- Immobilization of the peptide onto streptavidin-coated plates.
- Detection of aggrecanase activity via a neoepitope using antibody BC-3.
- Validation of assay specificity against matrix metalloproteinases (MMPs).
Main Results:
- A specific 41-residue peptide substrate for aggrecanases was identified.
- The assay demonstrated high specificity for aggrecanases, with no activity observed for MMPs.
- A 96-well microplate assay was established for high-throughput screening.
- Peptide size reduction below 30 amino acids significantly decreased activity.
Conclusions:
- A robust and specific assay for aggrecanase activity has been developed.
- This assay is suitable for high-throughput screening and inhibitor discovery.
- The assay provides a valuable tool for research in aggrecanase-related diseases.