5jb2: Difference between revisions
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==Crystal structure of chicken LGP2 with 5'ppp 10-mer dsRNA and ADP-AlF4-Mg2+ at 2.2 A resolution.== | |||
<StructureSection load='5jb2' size='340' side='right' caption='[[5jb2]], [[Resolution|resolution]] 2.20Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5jb2]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JB2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5JB2 FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=ALF:TETRAFLUOROALUMINATE+ION'>ALF</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | |||
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene></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=5jb2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5jb2 OCA], [http://pdbe.org/5jb2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5jb2 RCSB], [http://www.ebi.ac.uk/pdbsum/5jb2 PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
RIG-I and MDA5 sense virus-derived short 5'ppp blunt-ended or long dsRNA, respectively, causing interferon production. Non-signaling LGP2 appears to positively and negatively regulate MDA5 and RIG-I signaling, respectively. Co-crystal structures of chicken (ch) LGP2 with dsRNA display a fully or semi-closed conformation depending on the presence or absence of nucleotide. LGP2 caps blunt, 3' or 5' overhang dsRNA ends with 1 bp longer overall footprint than RIG-I. Structures of 1:1 and 2:1 complexes of chMDA5 with short dsRNA reveal head-to-head packing rather than the polar head-to-tail orientation described for long filaments. chLGP2 and chMDA5 make filaments with a similar axial repeat, although less co-operatively for chLGP2. Overall, LGP2 resembles a chimera combining a MDA5-like helicase domain and RIG-I like CTD supporting both stem and end binding. Functionally, RNA binding is required for LGP2-mediated enhancement of MDA5 activation. We propose that LGP2 end-binding may promote nucleation of MDA5 oligomerization on dsRNA. | |||
Structural Analysis of dsRNA Binding to Anti-viral Pattern Recognition Receptors LGP2 and MDA5.,Uchikawa E, Lethier M, Malet H, Brunel J, Gerlier D, Cusack S Mol Cell. 2016 May 19;62(4):586-602. doi: 10.1016/j.molcel.2016.04.021. PMID:27203181<ref>PMID:27203181</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 5jb2" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Cusack, S]] | [[Category: Cusack, S]] | ||
[[Category: Uchikawa, E]] | [[Category: Uchikawa, E]] | ||
[[Category: Dsrna dependent atpase]] | |||
[[Category: Immune system]] | |||
[[Category: Innate immune pattern recognition receptor]] | |||
[[Category: Rig-i like helicase]] | |||
[[Category: Zinc-containing ctd domain]] | |||
Revision as of 15:44, 1 June 2016
Crystal structure of chicken LGP2 with 5'ppp 10-mer dsRNA and ADP-AlF4-Mg2+ at 2.2 A resolution.
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