1KQU

Human phospholipase A2 complexed with a substrate anologue


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.209 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

D-Tyrosine as a chiral precusor to potent inhibitors of human nonpancreatic secretory phospholipase A2 (IIa) with antiinflammatory activity.

Hansford, K.A.Reid, R.C.Clark, C.I.Tyndall, J.D.Whitehouse, M.W.Guthrie, T.McGeary, R.P.Schafer, K.Martin, J.L.Fairlie, D.P.

(2003) Chembiochem 4: 181-185

  • DOI: https://doi.org/10.1002/cbic.200390029
  • Primary Citation of Related Structures:  
    1J1A, 1KQU

  • PubMed Abstract: 

    Few reported inhibitors of secretory phospholipase A(2) enzymes truly inhibit the IIa human isoform (hnpsPLA(2)-IIa) noncovalently at submicromolar concentrations. Herein, the simple chiral precursor D-tyrosine was derivatised to give a series of potent new inhibitors of hnpsPLA(2)-IIa. A 2.2-A crystal structure shows an inhibitor bound in the active site of the enzyme, chelated to a Ca(2+) ion through carboxylate and amide oxygen atoms, H-bonded through an amide NH group to His48, with multiple hydrophobic contacts and a T-shaped aromatic-group-His6 interaction. Antiinflammatory activity is also demonstrated for two compounds administered orally to rats.


  • Organizational Affiliation

    Centre for Drug Design and Development, Institute for Molecular Bioscience, University of Queensland Brisbane, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phospholipase A2, membrane associated124Homo sapiensMutation(s): 0 
EC: 3.1.1.4
UniProt & NIH Common Fund Data Resources
Find proteins for P14555 (Homo sapiens)
Explore P14555 
Go to UniProtKB:  P14555
PHAROS:  P14555
GTEx:  ENSG00000188257 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14555
Sequence Annotations
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.209 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.55α = 90
b = 76.55β = 90
c = 93.46γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-11-11
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description