Related Experiment Videos
Crystal structure of catechol O-methyltransferase
J Vidgren1, L A Svensson, A Liljas
1Orion Corporation, Espoo, Finland.
Nature
|March 24, 1994
Summary
Catechol O-methyltransferase (COMT) enzyme
Area of Science:
- Biochemistry
- Enzymology
- Structural Biology
Background:
- Catechol O-methyltransferase (COMT) is a key enzyme in the central nervous system.
- It metabolizes catecholamine neurotransmitters like dopamine and inactivates compounds such as L-DOPA.
- COMT inhibitors are used with L-DOPA in Parkinson's disease therapy.
Purpose of the Study:
- To determine the atomic structure of COMT.
- To gain insights into the mechanism of the methyl transfer reaction catalyzed by COMT.
- To compare the COMT structure with other S-adenosyl-L-methionine (AdoMet)-dependent enzymes.
Main Methods:
- X-ray crystallography was used to solve the atomic structure of COMT.
- The structure was determined to 2.0 Å resolution.
Main Results:
- The atomic structure of COMT was solved at 2.0 Å resolution.
- The co-enzyme-binding domain of COMT shows significant similarity to AdoMet-dependent DNA methylases.
- This structural similarity provides new insights into the methyl transfer mechanism.
Conclusions:
- The solved COMT structure elucidates its methyl transfer mechanism.
- The structural homology suggests a common evolutionary origin or structural motif for AdoMet methylases.
- This finding has implications for understanding and designing inhibitors for COMT and related enzymes.