View source for 3sq9


==Crystal Structures of the Ligand Binding Domain of a Pentameric Alpha7 Nicotinic Receptor Chimera==
<StructureSection load='3sq9' size='340' side='right'caption='[[3sq9]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3sq9]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Lymnaea_stagnalis Lymnaea stagnalis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SQ9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3SQ9 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]] 3.1&#8491;</td></tr>
<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>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3sq9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sq9 OCA], [https://pdbe.org/3sq9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3sq9 RCSB], [https://www.ebi.ac.uk/pdbsum/3sq9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3sq9 ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The alpha(7) acetylcholine receptor (AChR) mediates pre- and postsynaptic neurotransmission in the central nervous system and is a potential therapeutic target in neurodegenerative, neuropsychiatric and inflammatory disorders. We determined the crystal structure of the extracellular domain of a receptor chimera constructed from the human alpha(7) AChR and Lymnaea stagnalis acetylcholine binding protein (AChBP), which shares 64% sequence identity and 71% similarity with native alpha(7). We also determined the structure with bound epibatidine, a potent AChR agonist. Comparison of the structures revealed molecular rearrangements and interactions that mediate agonist recognition and early steps in signal transduction in alpha(7) AChRs. The structures further revealed a ring of negative charge within the central vestibule, poised to contribute to cation selectivity. Structure-guided mutational studies disclosed distinctive contributions to agonist recognition and signal transduction in alpha(7) AChRs. The structures provide a realistic template for structure-aided drug design and for defining structure-function relationships of alpha(7) AChRs.

Ligand-binding domain of an alpha7-nicotinic receptor chimera and its complex with agonist.,Li SX, Huang S, Bren N, Noridomi K, Dellisanti CD, Sine SM, Chen L Nat Neurosci. 2011 Sep 11;14(10):1253-9. doi: 10.1038/nn.2908. PMID:21909087<ref>PMID:21909087</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3sq9" style="background-color:#fffaf0;"></div>

==See Also==
*[[Acetylcholine binding protein 3D structures|Acetylcholine binding protein 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Lymnaea stagnalis]]
[[Category: Bren N]]
[[Category: Chen L]]
[[Category: Dellisanti C]]
[[Category: Huang S]]
[[Category: Li S-X]]
[[Category: Noridomi K]]
[[Category: Sine S]]