View source for 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==
<StructureSection load='1oxr' size='340' side='right'caption='[[1oxr]], [[Resolution|resolution]] 1.93&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1oxr]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Naja_sagittifera Naja sagittifera]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OXR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1OXR FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.93&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AIN:2-(ACETYLOXY)BENZOIC+ACID'>AIN</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1oxr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1oxr OCA], [https://pdbe.org/1oxr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1oxr RCSB], [https://www.ebi.ac.uk/pdbsum/1oxr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1oxr ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PA2A3_NAJSG PA2A3_NAJSG] PLA2 catalyzes the calcium-dependent hydrolysis of the 2-acyl groups in 3-sn-phosphoglycerides.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ox/1oxr_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1oxr ConSurf].
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== Publication Abstract from PubMed ==
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

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 RK, Ethayathulla AS, Jabeen T, Sharma S, Kaur P, Singh TP J Drug Target. 2005 Feb;13(2):113-9. PMID:15823962<ref>PMID:15823962</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1oxr" style="background-color:#fffaf0;"></div>

==See Also==
*[[Phospholipase A2 3D structures|Phospholipase A2 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Naja sagittifera]]
[[Category: Ethayathulla AS]]
[[Category: Jabeen T]]
[[Category: Kaur P]]
[[Category: Sharma S]]
[[Category: Singh RK]]
[[Category: Singh TP]]
[[Category: Srinivasan A]]