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| | <StructureSection load='4ntx' size='340' side='right'caption='[[4ntx]], [[Resolution|resolution]] 2.27Å' scene=''> | | <StructureSection load='4ntx' size='340' side='right'caption='[[4ntx]], [[Resolution|resolution]] 2.27Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4ntx]] 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=4NTX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4NTX FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4ntx]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Gallus_gallus Gallus gallus] and [https://en.wikipedia.org/wiki/Micrurus_tener_tener Micrurus tener tener]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4NTX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4NTX FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AMR:3,5-DIAMINO-N-(AMINOIMINOMETHYL)-6-CHLOROPYRAZINECARBOXAMIDE'>AMR</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=P6G:HEXAETHYLENE+GLYCOL'>P6G</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AMR:3,5-DIAMINO-N-(AMINOIMINOMETHYL)-6-CHLOROPYRAZINECARBOXAMIDE'>AMR</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=P6G:HEXAETHYLENE+GLYCOL'>P6G</scene>, <scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4ntx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ntx OCA], [https://pdbe.org/4ntx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4ntx RCSB], [https://www.ebi.ac.uk/pdbsum/4ntx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4ntx ProSAT]</span></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3hgc|3hgc]], [[2qts|2qts]], [[4ntw|4ntw]], [[4nyk|4nyk]], [[4nty|4nty]], [[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=4ntx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ntx OCA], [http://pdbe.org/4ntx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4ntx RCSB], [http://www.ebi.ac.uk/pdbsum/4ntx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4ntx ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == 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> | + | [https://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;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | ==See Also== | | ==See Also== |
| | *[[Ion channels 3D structures|Ion channels 3D structures]] | | *[[Ion channels 3D structures|Ion channels 3D structures]] |
| | + | *[[Phospholipase A2 homolog|Phospholipase A2 homolog]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Chick]] | + | [[Category: Gallus gallus]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Mictn]] | + | [[Category: Micrurus tener tener]] |
| - | [[Category: Baconguis, I]] | + | [[Category: Baconguis I]] |
| - | [[Category: Bohlen, C J]] | + | [[Category: Bohlen CJ]] |
| - | [[Category: Goehring, A]] | + | [[Category: Goehring A]] |
| - | [[Category: Gouaux, E]] | + | [[Category: Gouaux E]] |
| - | [[Category: Julius, D]] | + | [[Category: Julius D]] |
| - | [[Category: Ion channel]]
| + | |
| - | [[Category: Kunitz]]
| + | |
| - | [[Category: Membrane]]
| + | |
| - | [[Category: Nociception]]
| + | |
| - | [[Category: Phospholipase a2-like]]
| + | |
| - | [[Category: Transport protein-toxin complex]]
| + | |
| Structural highlights
4ntx is a 3 chain structure with sequence from Gallus gallus and Micrurus tener tener. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | , , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
ASIC1_CHICK Cation channel with high affinity for sodium, which is gated by extracellular protons and inhibited by the diuretic amiloride (By similarity).[1]
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[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Coric T, Zheng D, Gerstein M, Canessa CM. Proton sensitivity of ASIC1 appeared with the rise of fishes by changes of residues in the region that follows TM1 in the ectodomain of the channel. J Physiol. 2005 Nov 1;568(Pt 3):725-35. Epub 2005 Jul 7. PMID:16002453 doi:http://dx.doi.org/jphysiol.2005.087734
- ↑ Baconguis I, Bohlen CJ, Goehring A, Julius D, Gouaux E. X-ray structure of Acid-sensing ion channel 1-snake toxin complex reveals open state of a na(+)-selective channel. Cell. 2014 Feb 13;156(4):717-29. doi: 10.1016/j.cell.2014.01.011. Epub 2014 Feb, 6. PMID:24507937 doi:http://dx.doi.org/10.1016/j.cell.2014.01.011
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