1dg2: Difference between revisions
No edit summary |
No edit summary |
||
(10 intermediate revisions by the same user not shown) | |||
Line 1: | Line 1: | ||
< | ==SOLUTION CONFORMATION OF A-CONOTOXIN AUIB== | ||
<StructureSection load='1dg2' size='340' side='right'caption='[[1dg2]]' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1dg2]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Conus_aulicus Conus aulicus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DG2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DG2 FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 20 models</td></tr> | |||
-- | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NH2:AMINO+GROUP'>NH2</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=1dg2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dg2 OCA], [https://pdbe.org/1dg2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dg2 RCSB], [https://www.ebi.ac.uk/pdbsum/1dg2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dg2 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/CA1B_CONAL CA1B_CONAL] Alpha-conotoxins act on postsynaptic membranes, they bind to the nicotinic acetylcholine receptors (nAChR) and thus inhibit them. This toxin blocks mammalian nAChR alpha-3/beta-4 subunits.<ref>PMID:9786965</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The neuronal nicotinic acetylcholine receptors constitute a highly diverse group, with subtypes consisting of pentameric combinations of alpha and beta subunits. alpha-Conotoxins are a homologous series of small peptides that antagonize these receptors. We present the three-dimensional solution structure of alpha-conotoxin AuIB, the first 15-residue alpha-conotoxin known to selectively block the alpha(3)beta(4) nicotinic acetylcholine receptor subtype. The pairwise backbone and heavy-atom root mean square deviation for an ensemble of 20 structures are 0.269 and 0.720 A, respectively. The overall fold of alpha-conotoxin AuIB closely resembles that of the alpha4/7 subfamily alpha-conotoxins. However, the absence of Tyr(15), normally present in other alpha4/7 members, results in tight bending of the backbone at the C terminus and effectively renders Asp(14) to assume the spatial location of Tyr(15) present in other neuronal alpha4/7 alpha-conotoxins. Structural comparison of alpha-conotoxin AuIB with the alpha(3)beta(2) subtype-specific alpha-conotoxin MII shows different electrostatic surface charge distributions, which may be important in differential receptor subtype recognition. | |||
Nuclear magnetic resonance solution conformation of alpha-conotoxin AuIB, an alpha(3)beta(4) subtype-selective neuronal nicotinic acetylcholine receptor antagonist.,Cho JH, Mok KH, Olivera BM, McIntosh JM, Park KH, Han KH J Biol Chem. 2000 Mar 24;275(12):8680-5. PMID:10722709<ref>PMID:10722709</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1dg2" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
== | |||
== | |||
[[Category: Conus aulicus]] | [[Category: Conus aulicus]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Cho | [[Category: Cho J-H]] | ||
[[Category: Han | [[Category: Han K-H]] | ||
[[Category: McIntosh | [[Category: McIntosh JM]] | ||
[[Category: Mok | [[Category: Mok KH]] | ||
[[Category: Olivera | [[Category: Olivera BM]] | ||
[[Category: Park | [[Category: Park K-H]] | ||