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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3iyk]] is a 9 chain structure with sequence from [https://en.wikipedia.org/wiki/Bluetongue_virus Bluetongue virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3IYK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3IYK FirstGlance]. <br>
<table><tr><td colspan='2'>[[3iyk]] is a 9 chain structure with sequence from [https://en.wikipedia.org/wiki/Bluetongue_virus Bluetongue virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3IYK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3IYK FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MNA:2-O-METHYL-5-N-ACETYL-ALPHA-D-+NEURAMINIC+ACID'>MNA</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 7&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MNA:2-O-METHYL-5-N-ACETYL-ALPHA-D-+NEURAMINIC+ACID'>MNA</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=3iyk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3iyk OCA], [https://pdbe.org/3iyk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3iyk RCSB], [https://www.ebi.ac.uk/pdbsum/3iyk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3iyk ProSAT]</span></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=3iyk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3iyk OCA], [https://pdbe.org/3iyk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3iyk RCSB], [https://www.ebi.ac.uk/pdbsum/3iyk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3iyk ProSAT]</span></td></tr>
</table>
</table>
== Function ==
[https://www.uniprot.org/uniprot/C5IWW1_9VIRU C5IWW1_9VIRU]
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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</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=3iyk ConSurf].
</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=3iyk ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Bluetongue virus (BTV) is transmitted by blood-feeding insects (Culicoides sp.) and causes hemorrhagic diseases in livestock. BTV is a nonenveloped, double-stranded RNA (dsRNA) virus with two capsids: a well-studied, stable core enclosing the dsRNA genome and a highly unstable, poorly studied coat responsible for host cell attachment and entry. Here, based on cryo-electron microscopy (cryoEM), we report a 7-A resolution structure of the infectious BTV virion, including the coat proteins. We show that unlike other dsRNA viruses, the VP2 attachment trimer has a triskelion shape composed of three tip domains branching from a central hub domain. We identify three putative sialic acid-binding pockets in the hub and present supporting biochemical data indicating sugar moiety binding is important for BTV infection. Despite being a nonenveloped virus, the putative VP5 membrane penetration trimer, located slightly inward of the VP2 attachment trimer, has a central coiled-coil alpha-helical bundle, similar to the fusion proteins of many enveloped viruses (e.g., HIV, herpesviruses, vesicular stomatitis virus, and influenza virus). Moreover, mapping of the amino acid sequence of VP5 to the secondary structural elements identified by cryoEM locates 15 amphipathic alpha-helical regions on the external surface of each VP5 trimer. The cryoEM density map also reveals few, weak interactions between the VP5 trimer and both the outer-coat VP2 trimer and the underlying core VP7 trimer, suggesting that the surface of VP5 could unfurl like an umbrella during penetration and shedding of the coat to release the transcriptionally active core particle.
Bluetongue virus coat protein VP2 contains sialic acid-binding domains, and VP5 resembles enveloped virus fusion proteins.,Zhang X, Boyce M, Bhattacharya B, Zhang X, Schein S, Roy P, Zhou ZH Proc Natl Acad Sci U S A. 2010 Mar 23. PMID:20332209<ref>PMID:20332209</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3iyk" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Virus coat proteins 3D structures|Virus coat proteins 3D structures]]
*[[Virus coat proteins 3D structures|Virus coat proteins 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</SX>
</SX>
[[Category: Bluetongue virus]]
[[Category: Bluetongue virus]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Bhattacharya, B]]
[[Category: Bhattacharya B]]
[[Category: Boyce, M]]
[[Category: Boyce M]]
[[Category: Roy, P]]
[[Category: Roy P]]
[[Category: Schein, S]]
[[Category: Schein S]]
[[Category: Zhang, X]]
[[Category: Zhang X]]
[[Category: Zhou, Z H]]
[[Category: Zhou ZH]]
[[Category: Icosahedral virus]]
[[Category: Virus]]
Retrieved from "https://proteopedia.org/3iyk"