View source for 2n99


==Solution structure of the SLURP-2, a secreted isoform of Lynx1==
<StructureSection load='2n99' size='340' side='right'caption='[[2n99]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2n99]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2N99 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2N99 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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2n99 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2n99 OCA], [https://pdbe.org/2n99 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2n99 RCSB], [https://www.ebi.ac.uk/pdbsum/2n99 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2n99 ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
Human-secreted Ly-6/uPAR-related protein-2 (SLURP-2) regulates the growth and differentiation of epithelial cells. Previously, the auto/paracrine activity of SLURP-2 was considered to be mediated via its interaction with the alpha3beta2 subtype of the nicotinic acetylcholine receptors (nAChRs). Here, we describe the structure and pharmacology of a recombinant analogue of SLURP-2. Nuclear magnetic resonance spectroscopy revealed a 'three-finger' fold of SLURP-2 with a conserved beta-structural core and three protruding loops. Affinity purification using cortical extracts revealed that SLURP-2 could interact with the alpha3, alpha4, alpha5, alpha7, beta2, and beta4 nAChR subunits, revealing its broader pharmacological profile. SLURP-2 inhibits acetylcholine-evoked currents at alpha4beta2 and alpha3beta2-nAChRs (IC50 ~0.17 and &gt;3 muM, respectively) expressed in Xenopus oocytes. In contrast, at alpha7-nAChRs, SLURP-2 significantly enhances acetylcholine-evoked currents at concentrations &lt;1 muM but induces inhibition at higher concentrations. SLURP-2 allosterically interacts with human M1 and M3 muscarinic acetylcholine receptors (mAChRs) that are overexpressed in CHO cells. SLURP-2 was found to promote the proliferation of human oral keratinocytes via interactions with alpha3beta2-nAChRs, while it inhibited cell growth via alpha7-nAChRs. SLURP-2/mAChRs interactions are also probably involved in the control of keratinocyte growth. Computer modeling revealed possible SLURP-2 binding to the 'classical' orthosteric agonist/antagonist binding sites at alpha7 and alpha3beta2-nAChRs.

Secreted Isoform of Human Lynx1 (SLURP-2): Spatial Structure and Pharmacology of Interactions with Different Types of Acetylcholine Receptors.,Lyukmanova EN, Shulepko MA, Shenkarev ZO, Bychkov ML, Paramonov AS, Chugunov AO, Kulbatskii DS, Arvaniti M, Dolejsi E, Schaer T, Arseniev AS, Efremov RG, Thomsen MS, Dolezal V, Bertrand D, Dolgikh DA, Kirpichnikov MP Sci Rep. 2016 Aug 3;6:30698. doi: 10.1038/srep30698. PMID:27485575<ref>PMID:27485575</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Arseniev AS]]
[[Category: Lyukmanova EN]]
[[Category: Paramonov AS]]
[[Category: Shenkarev ZO]]