2ZLB

Crystal structure of APO form of rat catechol-O-methyltransferase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structures of the Apo and Holo form of rat catechol-O-methyltransferase

Tsuji, E.Okazaki, K.Isaji, M.Takeda, K.

(2009) J.Struct.Biol. 165: 133-139

  • DOI: 10.1016/j.jsb.2008.11.012
  • Primary Citation of Related Structures:  2ZTH

  • PubMed Abstract: 
  • Catechol-O-methyltransferase (COMT, EC 2.1.1.6) is a monomeric enzyme that catalyzes the transfer of a methyl group from S-adenosyl-l-methionine (AdoMet) to the phenolic oxygen of substituted catechols. Although the inhibitor recognition pattern and ...

    Catechol-O-methyltransferase (COMT, EC 2.1.1.6) is a monomeric enzyme that catalyzes the transfer of a methyl group from S-adenosyl-l-methionine (AdoMet) to the phenolic oxygen of substituted catechols. Although the inhibitor recognition pattern and AdoMet site have already been studied crystallographically, structural information on the catalytic cycle of COMT has not yet been obtained. In this study, comparison of the co-factor and inhibitor-bound structures revealed that the Apo form of COMT shows a conformational change and there was no cleft corresponding to the AdoMet-binding site; the overall structure was partially open form and the substrate recognition site was not clearly defined. The Holo form of COMT was similar to the quaternary structure except for the beta6-beta7 and alpha2-alpha3 ligand recognition loops. These conformational changes provide a deeper insight into the structural events occurring in reactions catalyzed by AdoMet.


    Organizational Affiliation

    Molecular Design Research, R&D Kissei Pharmaceutical Co., Ltd. 4365-1 Kashiwabara, Hotaka, Azumino-city, Nagano 399-8304, Japan. eiichi_tsuji@pharm.kissei.co.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Catechol O-methyltransferase
A
223Rattus norvegicusGene Names: Comt
EC: 2.1.1.6
Find proteins for P22734 (Rattus norvegicus)
Go to UniProtKB:  P22734
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.179 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 56.262α = 90.00
b = 56.262β = 90.00
c = 117.483γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
AMoREphasing
BSSdata collection
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2008-04-04 
  • Released Date: 2008-10-07 
  • Deposition Author(s): Tsuji, E.

Revision History 

  • Version 1.0: 2008-10-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance