View source for 6tt0


==Crystal structure of a potent and reversible dual binding site Acetylcholinesterase chiral inhibitor==
<StructureSection load='6tt0' size='340' side='right'caption='[[6tt0]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6tt0]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Tetronarce_californica Tetronarce californica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6TT0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6TT0 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]] 2.8000302&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=N9T:(1~{R},3~{S})-~{N}-(6,7-dimethoxy-2-oxidanylidene-chromen-3-yl)-3-[(phenylmethyl)amino]cyclohexane-1-carboxamide'>N9T</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'>[https://proteopedia.org/fgij/fg.htm?mol=6tt0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6tt0 OCA], [https://pdbe.org/6tt0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6tt0 RCSB], [https://www.ebi.ac.uk/pdbsum/6tt0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6tt0 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ACES_TETCF ACES_TETCF] 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.
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== Publication Abstract from PubMed ==
Acetylcholinesterase (AChE) inhibitors (AChEIs) still remain the leading therapeutic options for the symptomatic treatment of cognitive deficits associated with mild-to-moderate Alzheimer's disease. The search for new AChEIs benefits from well-established knowledge of the molecular interactions of selective AChEIs, such as donepezil and related dual binding site inhibitors. Starting from a previously disclosed coumarin-based inhibitor (+/-)-cis-1, active as racemate in the nanomolar range toward AChE, we proceeded on a double track by (i) achieving chiral resolution of the enantiomers of 1 by HPLC and (ii) preparing two close achiral analogues of 1, i.e., compounds 4 and 6. An eudismic ratio as high as 20 was observed for the (-) enantiomer of cis-1. The X-ray crystal structure of the complex between the (-)-cis-1 eutomer (coded as MC1420) and T. californica AChE was determined at 2.8 A, and docking calculation results suggested that the eutomer in (1R,3S) absolute configuration should be energetically more favored in binding the enzyme than the eutomer in (1S,3R) configuration. The achiral analogues 4 and 6 were less effective in inhibiting AChE compared to (+/-)-cis-1, but interestingly butylamide 4 emerged as a potent inhibitor of butyrylcholinesterase (BChE).

Chiral Separation, X-ray Structure, and Biological Evaluation of a Potent and Reversible Dual Binding Site AChE Inhibitor.,Catto M, Pisani L, de la Mora E, Belviso BD, Mangiatordi GF, Pinto A, Palma A, Denora N, Caliandro R, Colletier JP, Silman I, Nicolotti O, Altomare CD ACS Med Chem Lett. 2020 Feb 7;11(5):869-876. doi: 10.1021/acsmedchemlett.9b00656., eCollection 2020 May 14. PMID:32435398<ref>PMID:32435398</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 6tt0" style="background-color:#fffaf0;"></div>

==See Also==
*[[Acetylcholinesterase 3D structures|Acetylcholinesterase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Tetronarce californica]]
[[Category: Belviso BD]]
[[Category: Caliandro R]]
[[Category: Catto M]]
[[Category: Colletier JP]]
[[Category: Mangiatordi GF]]
[[Category: De la Mora E]]