1OXR

Aspirin induces its Anti-inflammatory effects through its specific binding to Phospholipase A2: Crystal structure of the complex formed between Phospholipase A2 and Aspirin at 1.9A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 

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This is version 1.3 of the entry. See complete history


Literature

Aspirin induces its anti-inflammatory effects through its specific binding to phospholipase A2: crystal structure of the complex formed between phospholipase A2 and aspirin at 1.9 angstroms resolution.

Singh, R.K.Ethayathulla, A.S.Jabeen, T.Sharma, S.Kaur, P.Singh, T.P.

(2005) J Drug Target 13: 113-119

  • DOI: 10.1080/10611860400024078
  • Primary Citation of Related Structures:  
    1OXR

  • PubMed Abstract: 
  • Phospholipase A2 is potentially an important target for structure-based rational drug design. In order to determine the involvement of phospholipase A2 in the action of non-steroidal anti-inflammatory drugs (NSAIDs), the crystal structure of the complex formed between phospholipase A2 and aspirin has been determined at 1 ...

    Phospholipase A2 is potentially an important target for structure-based rational drug design. In order to determine the involvement of phospholipase A2 in the action of non-steroidal anti-inflammatory drugs (NSAIDs), the crystal structure of the complex formed between phospholipase A2 and aspirin has been determined at 1.9 angstroms resolution. The structure contains 915 protein atoms, 1 calcium ion, 13 atoms of aspirin and 105 water molecules. The observed electron density of the aspirin molecule in the structure was of very high quality thus allowing the precise determination of its atomic coordinates leading to the clear description of its interactions with the enzyme. The structure of the complex clearly shows that aspirin is literally embedded in the hydrophobic environment of PLA2. It is so placed in the substrate binding channel that it forms several important attractive interactions with calcium ion, His 48 and Asp 49. Thus, the structure of the complex clearly shows that aspirin occupies a favourable place in the specific binding site of PLA2. The binding studies have shown that acetyl salicylate (aspirin) binds to PLA2 enzyme specifically with a dissociation constant of 6.4 x 10(-6) M. The structural details and binding data suggest that the inhibition of PLA2 by aspirin is of pharmacological


    Organizational Affiliation

    Department of Biophysics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110 029, India.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phospholipase A2 isoform 3A119Naja sagittiferaMutation(s): 0 
EC: 3.1.1.4
UniProt
Find proteins for P60045 (Naja sagittifera)
Explore P60045 
Go to UniProtKB:  P60045
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AIN (Subject of Investigation/LOI)
Query on AIN

Download Ideal Coordinates CCD File 
B [auth A]2-(ACETYLOXY)BENZOIC ACID
C9 H8 O4
BSYNRYMUTXBXSQ-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
C [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
AIN Binding MOAD:  1OXR Kd: 6400 (nM) from 1 assay(s)
PDBBind:  1OXR Kd: 6400 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.627α = 90
b = 42.627β = 90
c = 65.137γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MAR345data collection
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-04-27
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description