1N7I

The structure of Phenylethanolamine N-methyltransferase in complex with S-adenosylhomocysteine and the inhibitor LY134046


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.238 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular recognition of sub-micromolar inhibitors by the epinephrine-synthesizing enzyme phenylethanolamine N-methyltransferase.

McMillan, F.M.Archbold, J.McLeish, M.J.Caine, J.M.Criscione, K.R.Grunewald, G.L.Martin, J.L.

(2004) J Med Chem 47: 37-44

  • DOI: 10.1021/jm0205752
  • Primary Citation of Related Structures:  
    1N7J, 1N7I

  • PubMed Abstract: 
  • The crystal structures of human phenylethanolamine N-methyltransferase in complex with S-adenosyl-l-homocysteine (7, AdoHcy) and either 7-iodo-1,2,3,4-tetrahydroisoquinoline (2) or 8,9-dichloro-2,3,4,5-tetrahydro-1H-2-benzazepine (3, LY134046) were d ...

    The crystal structures of human phenylethanolamine N-methyltransferase in complex with S-adenosyl-l-homocysteine (7, AdoHcy) and either 7-iodo-1,2,3,4-tetrahydroisoquinoline (2) or 8,9-dichloro-2,3,4,5-tetrahydro-1H-2-benzazepine (3, LY134046) were determined and compared with the structure of the enzyme complex with 7 and 7-aminosulfonyl-1,2,3,4-tetrahydroisoquinoline (1, SK&F 29661). The enzyme is able to accommodate a variety of chemically disparate functional groups on the aromatic ring of the inhibitors through adaptation of the binding pocket for this substituent and by subtle adjustments of the orientation of the inhibitors within the relatively planar binding site. In addition, the interactions formed by the amine nitrogen of all three inhibitors reinforce the hypothesis that this functional group mimics the beta-hydroxyl of norepinephrine rather than the amine. These studies provide further clues for the development of improved inhibitors for use as pharmacological probes.


    Organizational Affiliation

    Centre for Drug Design and Development and Special Research Centre for Functional and Applied Genomics, Institute for Molecular Bioscience, University of Queensland, Brisbane QLD 4072, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phenylethanolamine N-methyltransferaseAB282Homo sapiensMutation(s): 0 
Gene Names: PNMT OR PENTPNMTPENT
EC: 2.1.1.28
Find proteins for P11086 (Homo sapiens)
Explore P11086 
Go to UniProtKB:  P11086
NIH Common Fund Data Resources
PHAROS  P11086
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAH
Query on SAH

Download CCD File 
A, B
S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
 Ligand Interaction
LY1
Query on LY1

Download CCD File 
A, B
8,9-DICHLORO-2,3,4,5-TETRAHYDRO-1H-BENZO[C]AZEPINE
C10 H11 Cl2 N
IADAQXMUWITWNG-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
LY1Ki:  220   nM  BindingDB
LY1Ki :  260   nM  PDBBind
LY1Ki:  4400   nM  BindingDB
SAHKi:  29000   nM  BindingDB
LY1Ki:  260   nM  BindingDB
SAHKi:  62300   nM  BindingDB
LY1Ki:  10   nM  BindingDB
LY1Ki:  1390   nM  BindingDB
LY1Ki:  280   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.238 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.35α = 90
b = 94.35β = 90
c = 186.55γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-12-23
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance