1mah

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(New page: 200px<br /><applet load="1mah" size="450" color="white" frame="true" align="right" spinBox="true" caption="1mah, resolution 3.2&Aring;" /> '''FASCICULIN2-MOUSE ACE...)
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[[Image:1mah.gif|left|200px]]<br /><applet load="1mah" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1mah, resolution 3.2&Aring;" />
 
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'''FASCICULIN2-MOUSE ACETYLCHOLINESTERASE COMPLEX'''<br />
 
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==Overview==
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==FASCICULIN2-MOUSE ACETYLCHOLINESTERASE COMPLEX==
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The crystal structure of the snake toxin fasciculin, bound to mouse, acetylcholinesterase (mAChE), at 3.2 A resolution reveals a synergistic, three-point anchorage consistent with the picomolar dissociation constant, of the complex. Loop II of fasciculin contains a cluster of hydrophobic, residues that interact with the peripheral anionic site of the enzyme and, sterically occlude substrate access to the catalytic site. Loop I fits in, a crevice near the lip of the gorge to maximize the surface area of, contact of loop II at the gorge entry. The fasciculin core surrounds a, protruding loop on the enzyme surface and stabilizes the whole assembly., Upon binding of fasciculin, subtle structural rearrangements of AChE occur, that could explain the observed residual catalytic activity of the, fasciculin-enzyme complex.
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<StructureSection load='1mah' size='340' side='right'caption='[[1mah]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1mah]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Dendroaspis_angusticeps Dendroaspis angusticeps] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MAH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MAH FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.2&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1mah FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mah OCA], [https://pdbe.org/1mah PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mah RCSB], [https://www.ebi.ac.uk/pdbsum/1mah PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mah ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ACES_MOUSE ACES_MOUSE] Terminates signal transduction at the neuromuscular junction by rapid hydrolysis of the acetylcholine released into the synaptic cleft.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ma/1mah_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1mah ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The crystal structure of the snake toxin fasciculin, bound to mouse acetylcholinesterase (mAChE), at 3.2 A resolution reveals a synergistic three-point anchorage consistent with the picomolar dissociation constant of the complex. Loop II of fasciculin contains a cluster of hydrophobic residues that interact with the peripheral anionic site of the enzyme and sterically occlude substrate access to the catalytic site. Loop I fits in a crevice near the lip of the gorge to maximize the surface area of contact of loop II at the gorge entry. The fasciculin core surrounds a protruding loop on the enzyme surface and stabilizes the whole assembly. Upon binding of fasciculin, subtle structural rearrangements of AChE occur that could explain the observed residual catalytic activity of the fasciculin-enzyme complex.
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==About this Structure==
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Acetylcholinesterase inhibition by fasciculin: crystal structure of the complex.,Bourne Y, Taylor P, Marchot P Cell. 1995 Nov 3;83(3):503-12. PMID:8521480<ref>PMID:8521480</ref>
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1MAH is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Dendroaspis_angusticeps Dendroaspis angusticeps] and [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus] with NAG as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Acetylcholinesterase Acetylcholinesterase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.1.7 3.1.1.7] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1MAH OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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Acetylcholinesterase inhibition by fasciculin: crystal structure of the complex., Bourne Y, Taylor P, Marchot P, Cell. 1995 Nov 3;83(3):503-12. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=8521480 8521480]
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</div>
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[[Category: Acetylcholinesterase]]
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<div class="pdbe-citations 1mah" style="background-color:#fffaf0;"></div>
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==See Also==
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*[[Acetylcholinesterase 3D structures|Acetylcholinesterase 3D structures]]
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*[[Fasciculin|Fasciculin]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Dendroaspis angusticeps]]
[[Category: Dendroaspis angusticeps]]
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[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Mus musculus]]
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[[Category: Protein complex]]
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[[Category: Bourne Y]]
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[[Category: Bourne, Y.]]
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[[Category: Marchot P]]
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[[Category: Marchot, P.]]
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[[Category: Taylor P]]
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[[Category: Taylor, P.]]
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[[Category: NAG]]
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[[Category: hydrolase]]
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[[Category: serine esterase]]
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[[Category: synapse]]
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[[Category: toxin]]
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[[Category: venom]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 21:16:38 2007''
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Current revision

FASCICULIN2-MOUSE ACETYLCHOLINESTERASE COMPLEX

PDB ID 1mah

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