View source for 1n26


==Crystal Structure of the extra-cellular domains of Human Interleukin-6 Receptor alpha chain==
<StructureSection load='1n26' size='340' side='right'caption='[[1n26]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1n26]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N26 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1N26 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=CYS:CYSTEINE'>CYS</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=NDG:2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE'>NDG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=1n26 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n26 OCA], [https://pdbe.org/1n26 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1n26 RCSB], [https://www.ebi.ac.uk/pdbsum/1n26 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1n26 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/IL6RA_HUMAN IL6RA_HUMAN] Part of the receptor for interleukin 6. Binds to IL6 with low affinity, but does not transduce a signal. Signal activation necessitate an association with IL6ST. Activation may lead to the regulation of the immune response, acute-phase reactions and hematopoiesis.<ref>PMID:11017875</ref> <ref>PMID:16270750</ref>   Low concentration of a soluble form of IL6 receptor acts as an agonist of IL6 activity.<ref>PMID:11017875</ref> <ref>PMID:16270750</ref> 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/n2/1n26_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1n26 ConSurf].
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== Publication Abstract from PubMed ==
Dysregulated production of IL-6 and its receptor (IL-6R) are implicated in the pathogenesis of multiple myeloma, autoimmune diseases and prostate cancer. The IL-6R complex comprises two molecules each of IL-6, IL-6R, and the signaling molecule, gp130. Here, we report the x-ray structure (2.4 A) of the IL-6R ectodomains. The N-terminal strand of the Ig-like domain (D(1)) is disulfide-bonded to domain D(2), and domains D(2) and D(3), the cytokine-binding domain, are structurally similar to known cytokine-binding domains. The head-to-tail packing of two closely associated IL-6R molecules observed in the crystal may be representative of the configuration of the physiological dimer of IL-6R and provides new insight into the architecture of the IL-6R complex.

Structure of the extracellular domains of the human interleukin-6 receptor alpha -chain.,Varghese JN, Moritz RL, Lou MZ, Van Donkelaar A, Ji H, Ivancic N, Branson KM, Hall NE, Simpson RJ Proc Natl Acad Sci U S A. 2002 Dec 10;99(25):15959-64. Epub 2002 Dec 2. PMID:12461182<ref>PMID:12461182</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1n26" style="background-color:#fffaf0;"></div>

==See Also==
*[[Interleukin receptor 3D structures|Interleukin receptor 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Branson KM]]
[[Category: Hall NE]]
[[Category: Ivancic N]]
[[Category: Ji H]]
[[Category: Lou M-Z]]
[[Category: Moritz RL]]
[[Category: Simpson RJ]]
[[Category: Varghese JN]]
[[Category: Van Donkelaar A]]