Structure of human Leukotriene A4 hydrolase in complex with inhibitor 4AZ

Experimental Data Snapshot

  • Resolution: 2.03 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

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Bufexamac ameliorates LPS-induced acute lung injury in mice by targeting LTA4H

Xiao, Q.Dong, N.N.Yao, X.Wu, D.Lu, Y.Mao, F.Zhu, J.Li, J.Huang, J.Chen, A.Huang, L.Wang, X.Yang, G.He, G.Xu, Y.Lu, W.Q.

(2016) Sci Rep 6: 25298-25298

  • DOI: https://doi.org/10.1038/srep25298
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Neutrophils play an important role in the occurrence and development of acute lung injury (ALI). Leukotriene B4 (LTB4), a hydrolysis product of epoxide leukotriene A4 (LTA4) catalyzed by LTA4 hydrolase (LTA4H), is one of the most potent chemoattractants for neutrophil. Bufexamac is a drug widely used as an anti-inflammatory agent on the skin, however, the mechanism of action is still not fully understood. In this study, we found bufexamac was capable of specifically inhibiting LTA4H enzymatic activity and revealed the mode of interaction of bufexamac and LTA4H using X-ray crystallography. Moreover, bufexamac significantly prevented the production of LTB4 in neutrophil and inhibited the fMLP-induced neutrophil migration through inhibition of LTA4H. Finally, bufexamac significantly attenuated lung inflammation as reflected by reduced LTB4 levels and weakened neutrophil infiltration in bronchoalveolar lavage fluid from a lipopolysaccharide-induced ALI mouse model. In summary, our study indicates that bufexamac acts as an inhibitor of LTB4 biosynthesis and may have potential clinical applications for the treatment of ALI.

  • Organizational Affiliation

    The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science &Technology, Wuhan 430074, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Leukotriene A-4 hydrolase631Homo 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
Experimental Data & Validation

Experimental Data

  • Resolution: 2.03 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.983α = 90
b = 87.186β = 90
c = 99.434γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-10
    Type: Initial release
  • Version 1.1: 2024-03-20
    Changes: Data collection, Database references, Derived calculations