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< | ==Structural basis for natural lactonase and promiscuous phosphotriesterase activities== | ||
<StructureSection load='2vc7' size='340' side='right'caption='[[2vc7]], [[Resolution|resolution]] 2.05Å' scene=''> | |||
You may | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2vc7]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharolobus_solfataricus Saccharolobus solfataricus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VC7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2VC7 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]] 2.05Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CO:COBALT+(II)+ION'>CO</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=HT5:(4S)-4-(DECANOYLAMINO)-5-HYDROXY-3,4-DIHYDRO-2H-THIOPHENIUM'>HT5</scene>, <scene name='pdbligand=KCX:LYSINE+NZ-CARBOXYLIC+ACID'>KCX</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=2vc7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vc7 OCA], [https://pdbe.org/2vc7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2vc7 RCSB], [https://www.ebi.ac.uk/pdbsum/2vc7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2vc7 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/PHP_SACS2 PHP_SACS2] Has a low paraoxonase activity. Also active, but with a lower activity, against other organo-phosphorus insecticides such as Dursban, Coumaphos, pNP-butanoate or parathion.<ref>PMID:15909078</ref> | |||
== 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/vc/2vc7_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/main_output.php?pdb_ID=2vc7 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Organophosphates are the largest class of known insecticides, several of which are potent nerve agents. Consequently, organophosphate-degrading enzymes are of great scientific interest as bioscavengers and biodecontaminants. Recently, a hyperthermophilic phosphotriesterase (known as SsoPox), from the Archaeon Sulfolobus solfataricus, has been isolated and found to possess a very high lactonase activity. Here, we report the three-dimensional structures of SsoPox in the apo form (2.6 A resolution) and in complex with a quorum-sensing lactone mimic at 2.0 A resolution. The structure also reveals an unexpected active site topology, and a unique hydrophobic channel that perfectly accommodates the lactone substrate. Structural and mutagenesis evidence allows us to propose a mechanism for lactone hydrolysis and to refine the catalytic mechanism established for phosphotriesterases. In addition, SsoPox structures permit the correlation of experimental lactonase and phosphotriesterase activities and this strongly suggests lactonase activity as the cognate function of SsoPox. This example demonstrates that promiscuous activities probably constitute a large and efficient reservoir for the creation of novel catalytic activities. | |||
Structural basis for natural lactonase and promiscuous phosphotriesterase activities.,Elias M, Dupuy J, Merone L, Mandrich L, Porzio E, Moniot S, Rochu D, Lecomte C, Rossi M, Masson P, Manco G, Chabriere E J Mol Biol. 2008 Jun 20;379(5):1017-28. Epub 2008 Apr 16. PMID:18486146<ref>PMID:18486146</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2vc7" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Phosphotriesterase 3D structures|Phosphotriesterase 3D structures]] | |||
*[[Serum Paraoxonase|Serum Paraoxonase]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
== | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Saccharolobus solfataricus]] | |||
== | [[Category: Chabriere E]] | ||
< | [[Category: Dupuy J]] | ||
[[Category: | [[Category: Elias M]] | ||
[[Category: | [[Category: Lecomte C]] | ||
[[Category: Chabriere | [[Category: Manco G]] | ||
[[Category: Dupuy | [[Category: Mandrich L]] | ||
[[Category: Elias | [[Category: Masson P]] | ||
[[Category: Lecomte | [[Category: Merone L]] | ||
[[Category: Manco | [[Category: Moniot S]] | ||
[[Category: Mandrich | [[Category: Rochu D]] | ||
[[Category: Masson | [[Category: Rossi M]] | ||
[[Category: Merone | |||
[[Category: Moniot | |||
[[Category: Rochu | |||
[[Category: Rossi | |||
Latest revision as of 18:14, 13 December 2023
Structural basis for natural lactonase and promiscuous phosphotriesterase activitiesStructural basis for natural lactonase and promiscuous phosphotriesterase activities
Structural highlights
FunctionPHP_SACS2 Has a low paraoxonase activity. Also active, but with a lower activity, against other organo-phosphorus insecticides such as Dursban, Coumaphos, pNP-butanoate or parathion.[1] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedOrganophosphates are the largest class of known insecticides, several of which are potent nerve agents. Consequently, organophosphate-degrading enzymes are of great scientific interest as bioscavengers and biodecontaminants. Recently, a hyperthermophilic phosphotriesterase (known as SsoPox), from the Archaeon Sulfolobus solfataricus, has been isolated and found to possess a very high lactonase activity. Here, we report the three-dimensional structures of SsoPox in the apo form (2.6 A resolution) and in complex with a quorum-sensing lactone mimic at 2.0 A resolution. The structure also reveals an unexpected active site topology, and a unique hydrophobic channel that perfectly accommodates the lactone substrate. Structural and mutagenesis evidence allows us to propose a mechanism for lactone hydrolysis and to refine the catalytic mechanism established for phosphotriesterases. In addition, SsoPox structures permit the correlation of experimental lactonase and phosphotriesterase activities and this strongly suggests lactonase activity as the cognate function of SsoPox. This example demonstrates that promiscuous activities probably constitute a large and efficient reservoir for the creation of novel catalytic activities. Structural basis for natural lactonase and promiscuous phosphotriesterase activities.,Elias M, Dupuy J, Merone L, Mandrich L, Porzio E, Moniot S, Rochu D, Lecomte C, Rossi M, Masson P, Manco G, Chabriere E J Mol Biol. 2008 Jun 20;379(5):1017-28. Epub 2008 Apr 16. PMID:18486146[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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