2OBF

Structure of K57A hPNMT with inhibitor 3-Hydroxymethyl-7-(N-4-chlorophenylaminosulfonyl)-THIQ and AdoHcy (SAH)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.217 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Enzyme Adaptation to Inhibitor Binding: A Cryptic Binding Site in Phenylethanolamine N-Methyltransferase

Gee, C.L.Drinkwater, N.Tyndall, J.D.A.Grunewald, G.L.Wu, Q.McLeish, M.J.Martin, J.L.

(2007) J Med Chem 50: 4845-4853

  • DOI: 10.1021/jm0703385
  • Primary Citation of Related Structures:  
    2OBF, 2ONZ, 2ONY, 2OPB, 2G72, 2G71, 2G70

  • PubMed Abstract: 
  • Shape complementarity is a fundamental principle of inhibitor design. Here we show that an enzyme for which the crystal structure has been determined (phenylethanolamine N-methyltransferase, PNMT) conceals a cryptic binding site. This site is reveale ...

    Shape complementarity is a fundamental principle of inhibitor design. Here we show that an enzyme for which the crystal structure has been determined (phenylethanolamine N-methyltransferase, PNMT) conceals a cryptic binding site. This site is revealed upon binding of inhibitors that are double the size of the physiological substrate. These large inhibitors are not predicted to bind in that they protrude through the accessible surface calculated from a PNMT/7-aminosulfonyl-1,2,3,4-tetrahydroisoquinoline (SK&F 29661) crystal structure, yet they are potent inhibitors of PNMT. We determined structures of the enzyme complexed with large inhibitors and found that the volume of the active site increases by 140 A3 upon binding. Changes in active site size and shape are brought about by unfavorable side chain conformations and rigid body helix motions. The energetic cost is modest, estimated at 2-3 kcal/mol from mutational analyses. Our findings further underline the importance of protein flexibility in structure-based inhibitor design studies.


    Organizational Affiliation

    Institute for Molecular Bioscience and ARC Special Research Centre for Functional and Applied Genomics, University of Queensland, Brisbane, Qld, 4072 Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phenylethanolamine N-methyltransferaseAB289Homo sapiensMutation(s): 1 
Gene Names: PNMTPENT
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 Ideal Coordinates CCD File 
A, B
S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
 Ligand Interaction
F83
Query on F83

Download Ideal Coordinates CCD File 
A, B
(3R)-N-(4-CHLOROPHENYL)-3-(HYDROXYMETHYL)-1,2,3,4-TETRAHYDROISOQUINOLINE-7-SULFONAMIDE
C16 H17 Cl N2 O3 S
YTBGBMPLINFTBQ-OAHLLOKOSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
F83Ki:  1.399999976158142   nM  Binding MOAD
F83Ki:  63   nM  BindingDB
SAHKi:  29000   nM  BindingDB
F83Ki :  1.399999976158142   nM  PDBBind
F83Ki:  39   nM  BindingDB
SAHKi:  62300   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.217 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.68α = 90
b = 94.68β = 90
c = 188.3γ = 90
Software Package:
Software NamePurpose
d*TREKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection
d*TREKdata reduction
CNSphasing
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-10-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Derived calculations, Version format compliance