==Complex of TcAChE with galanthamine derivative==

<StructureSection load='1w6r' size='340' side='right'caption='[[1w6r]], [[Resolution|resolution]] 2.05&Aring;' scene=''>

<table><tr><td colspan='2'>[[1w6r]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Torpedo_californica Torpedo californica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1W6R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1W6R FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GNT:(-)-GALANTHAMINE'>GNT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></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=1w6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1w6r OCA], [http://pdbe.org/1w6r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1w6r RCSB], [http://www.ebi.ac.uk/pdbsum/1w6r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1w6r ProSAT]</span></td></tr>

== Function ==

[[http://www.uniprot.org/uniprot/ACES_TORCA ACES_TORCA]] Terminates signal transduction at the neuromuscular junction by rapid hydrolysis of the acetylcholine released into the synaptic cleft. May be involved in cell-cell interactions.

<div style="background-color:#fffaf0;">

== Publication Abstract from PubMed ==

Bifunctional derivatives of the alkaloid galanthamine, designed to interact with both the active site of the enzyme acetylcholinesterase (AChE) and its peripheral cation binding site, have been assayed with Torpedo californica AChE (TcAChE), and the three-dimensional structures of their complexes with the enzyme have been solved by X-ray crystallography. Differences were noted between the IC(50) values obtained for TcAChE and those for Electrophorus electricus AChE. These differences are ascribed to sequence differences in one or two residues lining the active-site gorge of the enzyme. The binding of one of the inhibitors disrupts the native conformation of one wall of the gorge, formed by the loop Trp279-Phe290. It is proposed that flexibility of this loop may permit the binding of inhibitors such as galanthamine, which are too bulky to penetrate the narrow neck of the gorge formed by Tyr121 and Phe330 as seen in the crystal structure.

The complex of a bivalent derivative of galanthamine with torpedo acetylcholinesterase displays drastic deformation of the active-site gorge: implications for structure-based drug design.,Greenblatt HM, Guillou C, Guenard D, Argaman A, Botti S, Badet B, Thal C, Silman I, Sussman JL J Am Chem Soc. 2004 Dec 1;126(47):15405-11. PMID:15563167<ref>PMID:15563167</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

</div>

<div class="pdbe-citations 1w6r" style="background-color:#fffaf0;"></div>

==See Also==

*[[AChE inhibitors and substrates|AChE inhibitors and substrates]]

*[[Acetylcholinesterase 3D structures|Acetylcholinesterase 3D structures]]

*[[Complex of TcAChE with bis-acting galanthamine derivative|Complex of TcAChE with bis-acting galanthamine derivative]]

== References ==

<references/>

[[Category: Acetylcholinesterase]]

[[Category: Torpedo californica]]

[[Category: Gpi-anchor]]

[[Category: Synapse]]