8AVA

Leukotriene A4 hydrolase in complex with 4-(4-benzylphenyl)-oxazol-2-amine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.146 
  • R-Value Observed: 0.147 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Modulation of the 5-Lipoxygenase Pathway by Chalcogen-Containing Inhibitors of Leukotriene A 4 Hydrolase.

Teder, T.Konig, S.Singh, R.Samuelsson, B.Werz, O.Garscha, U.Haeggstrom, J.Z.

(2023) Int J Mol Sci 24

  • DOI: https://doi.org/10.3390/ijms24087539
  • Primary Citation of Related Structures:  
    8AVA, 8AWH

  • PubMed Abstract: 

    The 5-lipoxygenase (5-LOX) pathway gives rise to bioactive inflammatory lipid mediators, such as leukotrienes (LTs). 5-LOX carries out the oxygenation of arachidonic acid to the 5-hydroperoxy derivative and then to the leukotriene A 4 epoxide which is converted to a chemotactic leukotriene B 4 (LTB 4 ) by leukotriene A 4 hydrolase (LTA 4 H). In addition, LTA 4 H possesses aminopeptidase activity to cleave the N-terminal proline of a pro-inflammatory tripeptide, prolyl-glycyl-proline (PGP). Based on the structural characteristics of LTA 4 H, it is possible to selectively inhibit the epoxide hydrolase activity while sparing the inactivating, peptidolytic, cleavage of PGP. In the current study, chalcogen-containing compounds, 4-(4-benzylphenyl) thiazol-2-amine (ARM1) and its selenazole (TTSe) and oxazole (TTO) derivatives were characterized regarding their inhibitory and binding properties. All three compounds selectively inhibit the epoxide hydrolase activity of LTA 4 H at low micromolar concentrations, while sparing the aminopeptidase activity. These inhibitors also block the 5-LOX activity in leukocytes and have distinct inhibition constants with recombinant 5-LOX. Furthermore, high-resolution structures of LTA 4 H with inhibitors were determined and potential binding sites to 5-LOX were proposed. In conclusion, we present chalcogen-containing inhibitors which differentially target essential steps in the biosynthetic route for LTB 4 and can potentially be used as modulators of inflammatory response by the 5-LOX pathway.


  • Organizational Affiliation

    Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17177 Stockholm, Sweden.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Leukotriene A-4 hydrolase617Homo sapiensMutation(s): 0 
Gene Names: LTA4HLTA4
EC: 3.3.2.6 (PDB Primary Data), 3.4.11.4 (PDB Primary Data)
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
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  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
OVO (Subject of Investigation/LOI)
Query on OVO

Download Ideal Coordinates CCD File 
L [auth A]4-[4-(phenylmethyl)phenyl]-1,3-oxazol-2-amine
C16 H14 N2 O
FZDQKNHCMWUWBD-UHFFFAOYSA-N
YB
Query on YB

Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth A],
F [auth A]
YTTERBIUM (III) ION
Yb
AWSFICBXMUKWSK-UHFFFAOYSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
N [auth A],
O [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
IMD
Query on IMD

Download Ideal Coordinates CCD File 
J [auth A],
K [auth A]
IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O
ZN (Subject of Investigation/LOI)
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
ACT
Query on ACT

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G [auth A],
H [auth A],
I [auth A],
M [auth A]
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.146 
  • R-Value Observed: 0.147 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.072α = 90
b = 87.094β = 90
c = 99.271γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swedish Research CouncilSweden2018-02818
Estonian Research CouncilEstoniaPUTJD1046

Revision History  (Full details and data files)

  • Version 1.0: 2023-05-03
    Type: Initial release
  • Version 1.1: 2023-05-10
    Changes: Database references
  • Version 1.2: 2024-02-07
    Changes: Data collection, Refinement description