3WKD

Crystal structure of soluble epoxide hydrolase in complex with fragment inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural insights into binding of inhibitors to soluble epoxide hydrolase gained by fragment screening and X-ray crystallography

Amano, Y.Yamaguchi, T.Tanabe, E.

(2014) Bioorg.Med.Chem. --: --

  • DOI: 10.1016/j.bmc.2014.03.001
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Soluble epoxide hydrolase (sEH) is a component of the arachidonic acid cascade and is a candidate target for therapies for hypertension or inflammation. Although many sEH inhibitors are available, their scaffolds are not structurally diverse, and kno ...

    Soluble epoxide hydrolase (sEH) is a component of the arachidonic acid cascade and is a candidate target for therapies for hypertension or inflammation. Although many sEH inhibitors are available, their scaffolds are not structurally diverse, and knowledge of their specific interactions with sEH is limited. To obtain detailed structural information about protein-ligand interactions, we conducted fragment screening of sEH, analyzed the fragments using high-throughput X-ray crystallography, and determined 126 fragment-bound structures at high resolution. Aminothiazole and benzimidazole derivatives were identified as novel scaffolds that bind to the catalytic triad of sEH with good ligand efficiency. We further identified fragment hits that bound to subpockets of sEH called the short and long branches. The water molecule conserved in the structure plays an important role in binding to the long branch, whereas Asp496 and the main chain of Phe497 form hydrogen bonds with fragment hits in the short branch. Fragment hits and their crystal structures provide structural insights into ligand binding to sEH that will facilitate the discovery of novel and potent inhibitors of sEH.


    Organizational Affiliation

    Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba, Ibaraki, Japan. Electronic address: yasushi-amano@astellas.com.,Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba, Ibaraki, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Bifunctional epoxide hydrolase 2
A
561Homo sapiensMutation(s): 0 
Gene Names: EPHX2
Find proteins for P34913 (Homo sapiens)
Go to Gene View: EPHX2
Go to UniProtKB:  P34913
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

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Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
S0K
Query on S0K

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Download CCD File 
A
N-[2-(morpholin-4-yl)phenyl]thiophene-3-carboxamide
C15 H16 N2 O2 S
SULRJGWRXWPTDW-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
S0KIC50: 171000 nM (100) BINDINGDB
S0KIC50: 171000 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.208 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 92.786α = 90.00
b = 92.786β = 90.00
c = 245.269γ = 120.00
Software Package:
Software NamePurpose
ADSCdata collection
AMoREphasing
HKL-2000data reduction
HKL-2000data scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-04-16
    Type: Initial release