3S68

Rat COMT in complex with SAM and Tolcapone at 1.85A, P3221, Rfree=22.0


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Catechol-O-methyltransferase in complex with substituted 3'-deoxyribose bisubstrate inhibitors

Ellermann, M.Lerner, C.Burgy, G.Ehler, A.Bissantz, C.Jakob-Roetne, R.Paulini, R.Allemann, O.Tissot, H.Grunstein, D.Stihle, M.Diederich, F.Rudolph, M.G.

(2012) Acta Crystallogr D Biol Crystallogr 68: 253-260

  • DOI: 10.1107/S0907444912001138
  • Primary Citation of Related Structures:  
    3NWE, 3NWB, 3S68, 3U81, 3R6T

  • PubMed Abstract: 
  • The biological activity of catechol neurotransmitters such as dopamine in the synapse is modulated by transporters and enzymes. Catechol-O-methyltransferase (COMT; EC 2.1.1.6) inactivates neurotransmitters by catalyzing the transfer of a methyl group ...

    The biological activity of catechol neurotransmitters such as dopamine in the synapse is modulated by transporters and enzymes. Catechol-O-methyltransferase (COMT; EC 2.1.1.6) inactivates neurotransmitters by catalyzing the transfer of a methyl group from S-adenosylmethionine to catechols in the presence of Mg²⁺. This pathway also inactivates L-DOPA, the standard therapeutic for Parkinson's disease. Depletion of catechol neurotransmitters in the prefrontal cortex has been linked to schizophrenia. The inhibition of COMT therefore promises improvements in the treatment of these diseases. The concept of bisubstrate inhibitors for COMT has been described previously. Here, ribose-modified bisubstrate inhibitors were studied. Three high-resolution crystal structures of COMT in complex with novel ribose-modified bisubstrate inhibitors confirmed the predicted binding mode but displayed subtle alterations at the ribose-binding site. The high affinity of the inhibitors can be convincingly rationalized from the structures, which document the possibility of removing and/or replacing the ribose 3'-hydroxyl group and provide a framework for further inhibitor design.


    Organizational Affiliation

    Laboratorium für Organische Chemie, ETH Zürich, Hönggerberg, HCI, CH-8093 Zürich, Switzerland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Catechol O-methyltransferaseA221Rattus norvegicusMutation(s): 0 
Gene Names: Comt
EC: 2.1.1.6
Find proteins for P22734 (Rattus norvegicus)
Explore P22734 
Go to UniProtKB:  P22734
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAM
Query on SAM

Download CCD File 
A
S-ADENOSYLMETHIONINE
C15 H22 N6 O5 S
MEFKEPWMEQBLKI-FCKMPRQPSA-N
 Ligand Interaction
TCW
Query on TCW

Download CCD File 
A
Tolcapone
C14 H11 N O5
MIQPIUSUKVNLNT-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TCWIC50:  2200   nM  BindingDB
TCWIC50 :  2.200000047683716   nM  PDBBind
TCWIC50:  930   nM  BindingDB
TCWIC50:  2.200000047683716   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.604α = 90
b = 50.604β = 90
c = 168.584γ = 120
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
XDSdata reduction
SADABSdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-01
    Type: Initial release
  • Version 1.1: 2012-02-22
    Changes: Database references
  • Version 1.2: 2012-04-11
    Changes: Database references
  • Version 1.3: 2012-05-23
    Changes: Structure summary
  • Version 1.4: 2017-11-08
    Changes: Refinement description