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{{STRUCTURE_1pth|  PDB=1pth  |  SCENE=  }}
==The Structural Basis of Aspirin Activity Inferred from the Crystal Structure of Inactivated Prostaglandin H2 Synthase==
===The Structural Basis of Aspirin Activity Inferred from the Crystal Structure of Inactivated Prostaglandin H2 Synthase===
<StructureSection load='1pth' size='340' side='right' caption='[[1pth]], [[Resolution|resolution]] 3.40&Aring;' scene=''>
{{ABSTRACT_PUBMED_7552725}}
== Structural highlights ==
<table><tr><td colspan='2'>[[1pth]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Ovis_aries Ovis aries]. The May 2001 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Cyclooxygenase''  by David S. Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2001_5 10.2210/rcsb_pdb/mom_2001_5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PTH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1PTH FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BOG:B-OCTYLGLUCOSIDE'>BOG</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=SAL:2-HYDROXYBENZOIC+ACID'>SAL</scene><br>
<tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=0AH:O-(BROMOACETYL)-L-SERINE'>0AH</scene></td></tr>
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Prostaglandin-endoperoxide_synthase Prostaglandin-endoperoxide synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.99.1 1.14.99.1] </span></td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1pth FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pth OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1pth RCSB], [http://www.ebi.ac.uk/pdbsum/1pth PDBsum]</span></td></tr>
<table>
== 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/pt/1pth_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Aspirin exerts its anti-inflammatory effects through selective acetylation of serine 530 on prostaglandin H2 synthase (PGHS). Here we present the 3.4 A resolution X-ray crystal structure of PGHS isoform-1 inactivated by the potent aspirin analogue 2-bromoacetoxy-benzoic acid. Acetylation by this analogue abolishes cyclooxygenase activity by steric blockage of the active-site channel and not through a large conformational change. We observe two rotameric states of the acetyl-serine side chain which block the channel to different extents, a result which may explain the dissimilar effects of aspirin on the two PGHS isoforms. We also observe the product salicylic acid binding at a site consistent with its antagonistic effect on aspirin activity.


==About this Structure==
The structural basis of aspirin activity inferred from the crystal structure of inactivated prostaglandin H2 synthase.,Loll PJ, Picot D, Garavito RM Nat Struct Biol. 1995 Aug;2(8):637-43. PMID:7552725<ref>PMID:7552725</ref>
[[1pth]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Ovis_aries Ovis aries]. The May 2001 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Cyclooxygenase''  by David S. Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2001_5 10.2210/rcsb_pdb/mom_2001_5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PTH OCA].
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>


==See Also==
==See Also==
*[[Cyclooxygenase|Cyclooxygenase]]
*[[Cyclooxygenase|Cyclooxygenase]]
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:007552725</ref><references group="xtra"/>
__TOC__
</StructureSection>
[[Category: Cyclooxygenase]]
[[Category: Cyclooxygenase]]
[[Category: Ovis aries]]
[[Category: Ovis aries]]
Retrieved from "https://proteopedia.org/1pth"