Leukotriene A4 hydrolase in complex with pyridin-4-yl[4-(2-pyrrolidin-1-ylethoxy)phenyl]methanone

Experimental Data Snapshot

  • Resolution: 2.39 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

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Ligand Structure Quality Assessment 

This is version 1.3 of the entry. See complete history


Discovery of 4-[(2S)-2-{[4-(4-chlorophenoxy)phenoxy]methyl}-1-pyrrolidinyl]butanoic acid (DG-051) as a novel leukotriene A4 hydrolase inhibitor of leukotriene B4 biosynthesis.

Sandanayaka, V.Mamat, B.Mishra, R.K.Winger, J.Krohn, M.Zhou, L.M.Keyvan, M.Enache, L.Sullins, D.Onua, E.Zhang, J.Halldorsdottir, G.Sigthorsdottir, H.Thorlaksdottir, A.Sigthorsson, G.Thorsteinnsdottir, M.Davies, D.R.Stewart, L.J.Zembower, D.E.Andresson, T.Kiselyov, A.S.Singh, J.Gurney, M.E.

(2010) J Med Chem 53: 573-585

  • DOI: https://doi.org/10.1021/jm900838g
  • Primary Citation of Related Structures:  
    3FH5, 3FH7, 3FH8, 3FHE, 3FTZ, 3FUL

  • PubMed Abstract: 

    Both in-house human genetic and literature data have converged on the identification of leukotriene 4 hydrolase (LTA(4)H) as a key target for the treatment of cardiovascular disease. We combined fragment-based crystallography screening with an iterative medicinal chemistry effort to optimize inhibitors of LTA(4)H. Ligand efficiency was followed throughout our structure-activity studies. As applied within the context of LTA(4)H inhibitor design, the chemistry team was able to design a potent compound 20 (DG-051) (K(d) = 26 nM) with high aqueous solubility (>30 mg/mL) and high oral bioavailability (>80% across species) that is currently undergoing clinical evaluation for the treatment of myocardial infarction and stroke. The structural biology-chemistry interaction described in this paper provides a sound alternative to conventional screening techniques. This is the first example of a gene-to-clinic paradigm enabled by a fragment-based drug discovery effort.

  • Organizational Affiliation

    Medicinal Chemistry, deCODE Chemistry, Inc., 2501 Davey Road, Woodridge, Illinois 60517, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Leukotriene A-4 hydrolase611Homo sapiensMutation(s): 0 
Gene Names: LTA4HLTA4
UniProt & NIH Common Fund Data Resources
Find proteins for P09960 (Homo sapiens)
Explore P09960 
Go to UniProtKB:  P09960
PHAROS:  P09960
GTEx:  ENSG00000111144 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP09960
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
52D BindingDB:  3FUL IC50: 1.99e+5 (nM) from 1 assay(s)
PDBBind:  3FUL IC50: 1.99e+5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.39 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.337α = 90
b = 87.083β = 90
c = 99.766γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History 

Deposition Data

  • Released Date: 2010-01-05 
  • Deposition Author(s): Davies, D.R.

Revision History  (Full details and data files)

  • Version 1.0: 2010-01-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description