View source for 3tgx


==IL-21:IL21R complex==
<StructureSection load='3tgx' size='340' side='right'caption='[[3tgx]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3tgx]] is a 16 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=3TGX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3TGX 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]] 2.8&#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=FUC:ALPHA-L-FUCOSE'>FUC</scene>, <scene name='pdbligand=FUL:BETA-L-FUCOSE'>FUL</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</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=3tgx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3tgx OCA], [https://pdbe.org/3tgx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3tgx RCSB], [https://www.ebi.ac.uk/pdbsum/3tgx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3tgx ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/IL21R_HUMAN IL21R_HUMAN] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Interleukin (IL) 21 is a class I cytokine, which exerts pleiotropic effects on both innate and adaptive immune responses. It signals through a heterodimeric receptor complex consisting of the IL-21 receptor (IL-21R) and the common gamma chain (gC). A hallmark of the class I cytokine receptors is the class I cytokine receptor signature motif (WSXWS). The exact role of this motif has not been determined yet, however, it has been implicated in diverse functions including ligand binding, receptor internalization, proper folding, and export as well as signal transduction. Furthermore, the WXXW is known to be a consensus sequence for C-mannosylation. Here we present the crystal structure of IL-21 bound to IL-21R and reveal that the WSXWS motif of IL-21R is C-mannosylated on the first tryptophan. We furthermore demonstrate that a sugar chain bridge the two fibronectin domains which constitute the extracellular domain of IL-21R and anchors at the WSXWS motif through an extensive hydrogen bonding network, including the mannosylation. The glycan thus transforms the V-shaped receptor into a A-frame. This finding offers a novel structural explanation of the role of the class I cytokine signature motif.

The crystal structure of the interleukin 21 receptor bound to interleukin 21 reveals that a sugar chain interacting with the WSXWS motif is an integral part of the interleukin 21 receptor.,Hamming OJ, Kang L, Svensson A, Karlsen JL, Rahbek-Nielsen H, Paludan SR, Hjorth SA, Bondensgaard K, Hartmann R J Biol Chem. 2012 Jan 10. PMID:22235133<ref>PMID:22235133</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3tgx" style="background-color:#fffaf0;"></div>

==See Also==
*[[Interleukin 3D structures|Interleukin 3D structures]]
*[[Interleukin receptor 3D structures|Interleukin receptor 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Bondensgaard K]]
[[Category: Hamming OJ]]
[[Category: Hartmann R]]
[[Category: Hjort SA]]
[[Category: Kang L]]
[[Category: Karlsen JL]]
[[Category: Paludan SR]]
[[Category: Rahbek-Nielsen H]]
[[Category: Svenson A]]