View source for 4nty


==Cesium sites in the crystal structure of acid-sensing ion channel in complex with snake toxin==
<StructureSection load='4nty' size='340' side='right'caption='[[4nty]], [[Resolution|resolution]] 2.65&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4nty]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Chick Chick] and [http://en.wikipedia.org/wiki/Mictn Mictn]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4NTY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4NTY FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CS:CESIUM+ION'>CS</scene>, <scene name='pdbligand=PE4:2-{2-[2-(2-{2-[2-(2-ETHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL'>PE4</scene></td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3hgc|3hgc]], [[2qts|2qts]], [[4ntw|4ntw]], [[4ntx|4ntx]], [[4nyk|4nyk]], [[4fz0|4fz0]]</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ASIC1, ACCN2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9031 CHICK])</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=4nty FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4nty OCA], [http://pdbe.org/4nty PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4nty RCSB], [http://www.ebi.ac.uk/pdbsum/4nty PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4nty ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/ASIC1_CHICK ASIC1_CHICK]] Cation channel with high affinity for sodium, which is gated by extracellular protons and inhibited by the diuretic amiloride (By similarity).<ref>PMID:16002453</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Acid-sensing ion channels (ASICs) detect extracellular protons produced during inflammation or ischemic injury and belong to the superfamily of degenerin/epithelial sodium channels. Here, we determine the cocrystal structure of chicken ASIC1a with MitTx, a pain-inducing toxin from the Texas coral snake, to define the structure of the open state of ASIC1a. In the MitTx-bound open state and in the previously determined low-pH desensitized state, TM2 is a discontinuous alpha helix in which the Gly-Ala-Ser selectivity filter adopts an extended, belt-like conformation, swapping the cytoplasmic one-third of TM2 with an adjacent subunit. Gly 443 residues of the selectivity filter provide a ring of three carbonyl oxygen atoms with a radius of approximately 3.6 A, presenting an energetic barrier for hydrated ions. The ASIC1a-MitTx complex illuminates the mechanism of MitTx action, defines the structure of the selectivity filter of voltage-independent, sodium-selective ion channels, and captures the open state of an ASIC.

X-ray structure of Acid-sensing ion channel 1-snake toxin complex reveals open state of a na(+)-selective channel.,Baconguis I, Bohlen CJ, Goehring A, Julius D, Gouaux E Cell. 2014 Feb 13;156(4):717-29. doi: 10.1016/j.cell.2014.01.011. Epub 2014 Feb, 6. PMID:24507937<ref>PMID:24507937</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4nty" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ion channels 3D structures|Ion channels 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Chick]]
[[Category: Large Structures]]
[[Category: Mictn]]
[[Category: Baconguis, I]]
[[Category: Bohlen, C J]]
[[Category: Goehring, A]]
[[Category: Gouaux, E]]
[[Category: Julius, D]]
[[Category: Ion channel]]
[[Category: Kunitz]]
[[Category: Membrane]]
[[Category: Nociception]]
[[Category: Phospholipase a2-like]]
[[Category: Transport protein-toxin complex]]