3lsx

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{{STRUCTURE_3lsx| PDB=3lsx | SCENE= }}
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==Piracetam bound to the ligand binding domain of GluA3==
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===Piracetam bound to the ligand binding domain of GluA3===
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<StructureSection load='3lsx' size='340' side='right' caption='[[3lsx]], [[Resolution|resolution]] 2.01&Aring;' scene=''>
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{{ABSTRACT_PUBMED_20163115}}
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3lsx]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3LSX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3LSX FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GLU:GLUTAMIC+ACID'>GLU</scene>, <scene name='pdbligand=PZI:2-(2-OXOPYRROLIDIN-1-YL)ACETAMIDE'>PZI</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3lsf|3lsf]], [[3lsl|3lsl]], [[3lsw|3lsw]]</td></tr>
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<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=3lsx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3lsx OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3lsx RCSB], [http://www.ebi.ac.uk/pdbsum/3lsx PDBsum]</span></td></tr>
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</table>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Glutamate receptors are the most prevalent excitatory neurotransmitter receptors in the vertebrate central nervous system and are important potential drug targets for cognitive enhancement and the treatment of schizophrenia. Allosteric modulators of AMPA receptors promote dimerization by binding to a dimer interface and reducing desensitization and deactivation. The pyrrolidine allosteric modulators, piracetam and aniracetam, were among the first of this class of drugs to be discovered. We have determined the structure of the ligand binding domain of the AMPA receptor subtypes GluA2 and GluA3 with piracetam and a corresponding structure of GluA3 with aniracetam. Both drugs bind to GluA2 and GluA3 in a very similar manner, suggesting little subunit specificity. However, the binding sites for piracetam and aniracetam differ considerably. Aniracetam binds to a symmetrical site at the center of the dimer interface. Piracetam binds to multiple sites along the dimer interface with low occupation, one of which is a unique binding site for potential allosteric modulators. This new site may be of importance in the design of new allosteric regulators.
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==Function==
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Piracetam defines a new binding site for allosteric modulators of alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid (AMPA) receptors.,Ahmed AH, Oswald RE J Med Chem. 2010 Mar 11;53(5):2197-203. PMID:20163115<ref>PMID:20163115</ref>
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[[http://www.uniprot.org/uniprot/GRIA3_RAT GRIA3_RAT]] Receptor for glutamate that functions as ligand-gated ion channel in the central nervous system and plays an important role in excitatory synaptic transmission. L-glutamate acts as an excitatory neurotransmitter at many synapses in the central nervous system. Binding of the excitatory neurotransmitter L-glutamate induces a conformation change, leading to the opening of the cation channel, and thereby converts the chemical signal to an electrical impulse. The receptor then desensitizes rapidly and enters a transient inactive state, characterized by the presence of bound agonist. In the presence of CACNG4 or CACNG7 or CACNG8, shows resensitization which is characterized by a delayed accumulation of current flux upon continued application of glutamate (By similarity).
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[3lsx]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3LSX OCA].
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</div>
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:020163115</ref><references group="xtra"/><references/>
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__TOC__
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</StructureSection>
[[Category: Rattus norvegicus]]
[[Category: Rattus norvegicus]]
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[[Category: Ahmed, A H.]]
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[[Category: Ahmed, A H]]
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[[Category: Oswald, R E.]]
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[[Category: Oswald, R E]]
[[Category: Allosteric modulator]]
[[Category: Allosteric modulator]]
[[Category: Ampa receptor]]
[[Category: Ampa receptor]]

Revision as of 14:48, 18 December 2014

Piracetam bound to the ligand binding domain of GluA3

3lsx, resolution 2.01Å

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