1H1D

CATECHOL O-METHYLTRANSFERASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Kinetics and Crystal Structure of Catechol-O-Methyltransferase Complex with Co-Substrate and a Novel Inhibitor with Potential Therapeutic Application

Bonifacio, M.J.Archer, M.Rodrigues, M.L.Matias, P.M.Learmonth, D.A.Carrondo, M.A.Soares-Da-Silva, P.

(2002) Mol.Pharmacol. 62: 795


  • PubMed Abstract: 
  • Catechol-O-methyltransferase (COMT; E.C. 2.1.1.6) is a ubiquitous enzyme in nature that plays an important role in the metabolism of catechol neurotransmitters and xenobiotics. In particular, inactivation of drugs such as L-3,4-dihydroxyphenylalanine ...

    Catechol-O-methyltransferase (COMT; E.C. 2.1.1.6) is a ubiquitous enzyme in nature that plays an important role in the metabolism of catechol neurotransmitters and xenobiotics. In particular, inactivation of drugs such as L-3,4-dihydroxyphenylalanine (L-DOPA) via O-methylation is of relevant pharmacological importance, because L-DOPA is currently the most effective drug used in the treatment of Parkinson's disease. This justified the interest in developing COMT inhibitors as potential adjuncts to L-DOPA therapy. The kinetics of inhibition by BIA 3-335 (1-[3,4-dihydroxy-5-nitrophenyl]-3-(N-3'-trifluormethylphenyl)-piperazine-1-propanone dihydrochloride) were characterized using recombinant rat soluble COMT. BIA 3-335 was found to act as a potent, reversible, tight-binding inhibitor of COMT with a K(i) of 6.0 +/- 1.6 nM and displaying a competitive inhibition toward the substrate binding site and uncompetitive inhibition toward the S-adenosyl-L-methionine (SAM) binding site. The 2.0-A resolution crystal structure of COMT in complex with its cosubstrate SAM and a novel inhibitor BIA 3-335 shows the atomic interactions between the important residues at the active site and the inhibitor. This is the first report of a three-dimensional structure determination of COMT complexed with a potent, reversible, and tight-binding inhibitor that is expected to have therapeutic applications.


    Related Citations: 
    • Crystallization and Preliminary Crystallographic Characterization of Catechol-O-Methyltransferase in Complex with its Co-Substrate and an Inhibitor
      Rodrigues, M.L.,Archer, M.,Bonifacio, M.J.,Soares-Da-Silva, P.,Carrondo, M.A.
      (2001) Acta Crystallogr.,Sect.D D57: 906


    Organizational Affiliation

    Department of Research and Development, BIAL, S. Mamede do Coronado, Portugal.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CATECHOL-O-METHYLTRANSFERASE
A
221Rattus norvegicusGene Names: Comt
EC: 2.1.1.6
Find proteins for P22734 (Rattus norvegicus)
Go to UniProtKB:  P22734
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BIA
Query on BIA

Download SDF File 
Download CCD File 
A
1-(3,4,DIHYDROXY-5-NITROPHENYL)-3-{4-[3-(TRIFLUOROMETHYL) PHENYL] PIPERAZIN-1-YL}PROPAN-1-ONE
BIA 3-335
C20 H20 F3 N3 O5
KVIVJQWOYSWCCZ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
SAM
Query on SAM

Download SDF File 
Download CCD File 
A
S-ADENOSYLMETHIONINE
C15 H22 N6 O5 S
MEFKEPWMEQBLKI-FCKMPRQPSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
BIAKi: 6 nM BINDINGMOAD
BIAKi: 6 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.174 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 51.490α = 90.00
b = 51.490β = 90.00
c = 168.290γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-07-17
    Type: Initial release
  • Version 1.1: 2014-02-19
    Type: Database references, Derived calculations, Non-polymer description, Other, Source and taxonomy, Version format compliance