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A novel metalloproteinase originally isolated from brain myelin membranes is present in many tissues
The Biochemical Journal
|May 15, 1990
Insights
Researchers developed a monoclonal antibody, CG4, targeting a novel 60 kDa metalloproteinase found in bovine brain myelin glycoproteins. This enzyme's activity and presence were consistent across various bovine tissues, suggesting a widespread biological role.
Area of Science:
- Biochemistry
- Immunology
- Neuroscience
Background:
- Metalloproteinases are enzymes involved in various biological processes.
- Myelin glycoproteins play crucial roles in the nervous system.
- Characterizing novel enzymes is essential for understanding cellular functions.
Purpose of the Study:
- To develop a specific antibody against a novel metalloproteinase.
- To investigate the distribution and activity of this metalloproteinase in bovine tissues.
Main Methods:
- Purification of a 60 kDa metalloproteinase from bovine brain myelin.
- Development of a monoclonal antibody (CG4) against the purified enzyme.
- Immunoblotting analysis of glycoproteins from bovine brain myelin and various tissues.
Main Results:
- The monoclonal antibody CG4 specifically recognized a 60 kDa band in myelin glycoproteins.
- This 60 kDa band was detected in glycoproteins from nine different bovine tissues.
- The presence and amount of the CG4-immunoreactive band correlated with the metalloproteinase's enzymic activity.
- Enzyme activity and presence showed minimal variation across the tested tissues.
Conclusions:
- A novel 60 kDa metalloproteinase, recognized by antibody CG4, is present in bovine brain myelin.
- This metalloproteinase is widely distributed in various bovine tissues.
- The enzyme's activity is relatively consistent across different tissues, indicating a potentially fundamental biological role.
Abstract:
A monoclonal antibody, CG4, was raised to a novel 60 kDa metalloproteinase purified from a bovine brain myelin glycoprotein fraction. Glycoproteins extracted from both myelin and nine different bovine tissues showed the 60 kDa CG4-immunoreactive band by immunoblotting in amounts that broadly paralleled enzymic activity of this metalloproteinase and varied relatively little among the tissues.