4XUE

Synthesis and evaluation of heterocyclic catechol mimics as inhibitors of catechol-O-methyltransferase (COMT): Structure with Cmpd27b

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

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This is version 1.1 of the entry. See complete history. 


Literature

Synthesis and Evaluation of Heterocyclic Catechol Mimics as Inhibitors of Catechol-O-methyltransferase (COMT).

Harrison, S.T., Poslusney, M.S., Mulhearn, J.J., Zhao, Z., Kett, N.R., Schubert, J.W., Melamed, J.Y., Allison, T.J., Patel, S.B., Sanders, J.M., Sharma, S., Smith, R.F., Hall, D.L., Robinson, R.G., Sachs, N.A., Hutson, P.H., Wolkenberg, S.E., Barrow, J.C.

(2015) ACS Med Chem Lett 6: 318-323

  • DOI: 10.1021/ml500502d
  • Primary Citation of Related Structures:  
    4XUC, 4XUD, 4XUE

  • PubMed Abstract: 

    • 3-Hydroxy-4-pyridinones and 5-hydroxy-4-pyrimidinones were identified as inhibitors of catechol-O-methyltransferase (COMT) in a high-throughput screen. These heterocyclic catechol mimics exhibit potent inhibition of the enzyme and an improved toxicity profile versus the marketed nitrocatechol inhibitors tolcapone and entacapone ...

    3-Hydroxy-4-pyridinones and 5-hydroxy-4-pyrimidinones were identified as inhibitors of catechol-O-methyltransferase (COMT) in a high-throughput screen. These heterocyclic catechol mimics exhibit potent inhibition of the enzyme and an improved toxicity profile versus the marketed nitrocatechol inhibitors tolcapone and entacapone. Optimization of the series was aided by X-ray cocrystal structures of the novel inhibitors in complex with COMT and cofactors SAM and Mg(2+). The crystal structures suggest a mechanism of inhibition for these heterocyclic inhibitors distinct from previously disclosed COMT inhibitors.

    Organizational Affiliation: 

    Department of Medicinal Chemistry, Global Structural Biology, Chemical Modeling and Informatics, and Department of Neuroscience Research, Merck Research Laboratories , Sumneytown Pike, West Point, Pennsylvania 19486, United States.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Catechol O-methyltransferaseB [auth A], A [auth B]215Homo sapiensMutation(s): 0 
Gene Names: COMT
EC: 2.1.1.6
Find proteins for P21964 (Homo sapiens)
Explore P21964 
Go to UniProtKB:  P21964
NIH Common Fund Data Resources
PHAROS:  P21964
GTEx:  ENSG00000093010
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAM
Query on SAM
Download Ideal Coordinates CCD File 
 E [auth B], H [auth A]S-ADENOSYLMETHIONINE
C15 H22 N6 O5 S
MEFKEPWMEQBLKI-FCKMPRQPSA-N		 Ligand Interaction
43J
Query on 43J
Download Ideal Coordinates CCD File 
 C [auth B], F [auth A]2-(biphenyl-3-yl)-5-hydroxy-3-methylpyrimidin-4(3H)-one
C17 H14 N2 O2
XFQLJHLLJPLAPL-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
 D [auth B], G [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
43JIC50:  5000   nM  Binding MOAD
43JIC50:  5000   nM  BindingDB
43JIC50:  170   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.043α = 90
b = 113.19β = 90
c = 113.818γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
MOLREPphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-04-15
    Type: Initial release
  • Version 1.1: 2017-11-22
    Changes: Derived calculations, Refinement description, Source and taxonomy, Structure summary