3doi: Difference between revisions
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==Crystal Structure of a Thermostable Esterase complex with paraoxon== | ==Crystal Structure of a Thermostable Esterase complex with paraoxon== | ||
<StructureSection load='3doi' size='340' side='right' caption='[[3doi]], [[Resolution|resolution]] 3.00Å' scene=''> | <StructureSection load='3doi' size='340' side='right' caption='[[3doi]], [[Resolution|resolution]] 3.00Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3doi]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[3doi]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_43589 Atcc 43589]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3DOI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3DOI FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=DEP:DIETHYL+PHOSPHONATE'>DEP</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=DEP:DIETHYL+PHOSPHONATE'>DEP</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3doh|3doh]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3doh|3doh]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TM_0033 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2336 | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TM_0033 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2336 ATCC 43589])</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Carboxylesterase Carboxylesterase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.1.1 3.1.1.1] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Carboxylesterase Carboxylesterase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.1.1 3.1.1.1] </span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3doi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3doi OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3doi RCSB], [http://www.ebi.ac.uk/pdbsum/3doi PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3doi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3doi OCA], [http://pdbe.org/3doi PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3doi RCSB], [http://www.ebi.ac.uk/pdbsum/3doi PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3doi ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
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<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </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/ | </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=3doi ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 3doi" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Atcc 43589]] | |||
[[Category: Carboxylesterase]] | [[Category: Carboxylesterase]] | ||
[[Category: Dijkstra, B W]] | [[Category: Dijkstra, B W]] | ||
[[Category: Hendriks, S]] | [[Category: Hendriks, S]] | ||
Revision as of 22:12, 11 August 2016
Crystal Structure of a Thermostable Esterase complex with paraoxonCrystal Structure of a Thermostable Esterase complex with paraoxon
Structural highlights
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 PubMedComparative analysis of the genome of the hyperthermophilic bacterium Thermotoga maritima revealed a hypothetical protein (EstA) with typical esterase features. The EstA protein was functionally produced in Escherichia coli and purified to homogeneity. It indeed displayed esterase activity with optima at or above 95 degrees C and at pH 8.5, with a preference for esters with short acyl chains (C2-C10). Its 2.6-A-resolution crystal structure revealed a classical alpha/beta hydrolase domain with a catalytic triad consisting of a serine, an aspartate, and a histidine. EstA is irreversibly inhibited by the organophosphate paraoxon. A 3.0-A-resolution structure confirmed that this inhibitor binds covalently to the catalytic serine residue of EstA. Remarkably, the structure also revealed the presence of an N-terminal immunoglobulin (Ig)-like domain, which is unprecedented among esterases. EstA forms a hexamer both in the crystal and in solution. Electron microscopy showed that the hexamer in solution is identical with the hexamer in the crystal, which is formed by two trimers, with the N-terminal domains facing each other. Mutational studies confirmed that residues Phe89, Phe112, Phe116, Phe246, and Trp377 affect enzyme activity. A truncated mutant of EstA, in which the Ig-like domain was removed, showed only 5% of wild-type activity, had lower thermostability, and failed to form hexamers. These data suggest that the Ig-like domain plays an important role in the enzyme multimerization and activity of EstA. Crystal structure and biochemical properties of a novel thermostable esterase containing an immunoglobulin-like domain.,Levisson M, Sun L, Hendriks S, Swinkels P, Akveld T, Bultema JB, Barendregt A, van den Heuvel RH, Dijkstra BW, van der Oost J, Kengen SW J Mol Biol. 2009 Jan 23;385(3):949-62. Epub 2008 Nov 5. PMID:19013466[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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