2x8b
From Proteopedia
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| - | [[Image:2x8b.png|left|200px]] | ||
| - | < | + | ==Crystal structure of human acetylcholinesterase inhibited by aged tabun and complexed with fasciculin-II== |
| - | + | <StructureSection load='2x8b' size='340' side='right'caption='[[2x8b]], [[Resolution|resolution]] 2.95Å' scene=''> | |
| - | You may | + | == Structural highlights == |
| - | + | <table><tr><td colspan='2'>[[2x8b]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Dendroaspis_angusticeps Dendroaspis angusticeps] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2X8B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2X8B FirstGlance]. <br> | |
| - | or | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.95Å</td></tr> |
| - | -- | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=SEN:O-[N,N-DIMETHYLPHOSPHORAMIDATE]-L-SERINE'>SEN</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=UNX:UNKNOWN+ATOM+OR+ION'>UNX</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=2x8b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2x8b OCA], [https://pdbe.org/2x8b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2x8b RCSB], [https://www.ebi.ac.uk/pdbsum/2x8b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2x8b ProSAT]</span></td></tr> | |
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/ACES_HUMAN ACES_HUMAN] Terminates signal transduction at the neuromuscular junction by rapid hydrolysis of the acetylcholine released into the synaptic cleft. Role in neuronal apoptosis.<ref>PMID:2714437</ref> <ref>PMID:1748670</ref> <ref>PMID:1517212</ref> <ref>PMID:11985878</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/x8/2x8b_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=2x8b ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Tabun is a warfare agent that inhibits human acetylcholinesterase (hAChE) by rapid phosphylation of the catalytic serine. A time-dependent reaction occurs on the tabun adduct, leading to an "aged" enzyme, resistant to oxime reactivators. The aging reaction may proceed via either dealkylation or deamidation, depending on the stereochemistry of the phosphoramidyl adduct. We solved the X-ray structure of aged tabun-hAChE complexed with fasciculin II, and we show that aging proceeds through O-dealkylation, in agreement with the aging mechanism that we determined for tabun-inhibited human butyrylcholinesterase and mouse acetylcholinesterase. Noteworthy, aging and binding of fasciculin II lead to an improved thermostability, resulting from additional stabilizing interactions between the two subdomains that face each other across the active site gorge. This first structure of hAChE inhibited by a nerve agent provides structural insight into the inhibition and aging mechanisms and a structural template for the design of molecules capable of reactivating aged hAChE. | ||
| - | + | Structural Evidence That Human Acetylcholinesterase Inhibited by Tabun Ages through O-Dealkylation.,Carletti E, Colletier JP, Dupeux F, Trovaslet M, Masson P, Nachon F J Med Chem. 2010 Apr 21. PMID:20408548<ref>PMID:20408548</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | <div class="pdbe-citations 2x8b" style="background-color:#fffaf0;"></div> | |
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| - | == | + | |
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==See Also== | ==See Also== | ||
| - | *[[Acetylcholinesterase]] | + | *[[Acetylcholinesterase 3D structures|Acetylcholinesterase 3D structures]] |
| - | *[[Fasciculin]] | + | *[[Fasciculin|Fasciculin]] |
| - | + | == References == | |
| - | == | + | <references/> |
| - | < | + | __TOC__ |
| - | + | </StructureSection> | |
[[Category: Dendroaspis angusticeps]] | [[Category: Dendroaspis angusticeps]] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: | + | [[Category: Carletti E]] |
| - | [[Category: | + | [[Category: Colletier JP]] |
| - | [[Category: | + | [[Category: Nachon F]] |
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Current revision
Crystal structure of human acetylcholinesterase inhibited by aged tabun and complexed with fasciculin-II
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