View source for 4bbc


==THE STRUCTURE OF VACCINIA VIRUS N1 R71Y MUTANT==
<StructureSection load='4bbc' size='340' side='right'caption='[[4bbc]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4bbc]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Vaccinia_virus_Western_Reserve Vaccinia virus Western Reserve]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4BBC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4BBC 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]] 3.1&#8491;</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=4bbc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4bbc OCA], [https://pdbe.org/4bbc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4bbc RCSB], [https://www.ebi.ac.uk/pdbsum/4bbc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4bbc ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/N1_VACCC N1_VACCC] Bcl-2-like protein which contributes to virulence by preventing host NF-kappa-B activation in response to pro-inflammatory stimuli such as TNF-alpha or IL1B.
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== Publication Abstract from PubMed ==
Vaccinia virus (VACV) protein N1 is an intracellular virulence factor and belongs to a family of VACV B-cell lymphoma (Bcl)-2-like proteins whose members inhibit apoptosis or activation of pro-inflammatory transcription factors, such as interferon (IFN) regulatory factor-3 (IRF-3) and nuclear factor-kappaB (NF-kappaB). Unusually, N1 inhibits both apoptosis and NF-kappaB activation. To understand how N1 exerts these different functions, we have mutated residues in the Bcl-2-like surface groove and at the interface used to form N1 homodimers. Mutagenesis of the surface groove abolished only the N1 anti-apoptotic activity and protein crystallography showed these mutants differed from wild-type N1 only at the site of mutation. Conversely, mutagenesis of the dimer interface converted N1 to a monomer and affected only inhibition of NF-kappaB activation. Collectively, these data show that N1 inhibits pro-inflammatory and pro-apoptotic signalling using independent surfaces of the protein. To determine the relative contribution of each activity to virus virulence, mutant N1 alleles were introduced into a VACV strain lacking N1 and the virulence of these viruses was analysed after intradermal and intranasal inoculation in mice. In both models, VACV containing a mutant N1 unable to inhibit apoptosis had similar virulence to wild-type virus, whereas VACV containing a mutant N1 impaired for NF-kappaB inhibition induced an attenuated infection similar to that of the N1-deleted virus. This indicates that anti-apoptotic activity of N1 does not drive virulence in these in vivo models, and highlights the importance of pro-inflammatory signalling in the immune response against viral infections.

Inhibition of apoptosis and NF-kappaB activation by vaccinia protein N1 occur via distinct binding surfaces and make different contributions to virulence.,Maluquer de Motes C, Cooray S, Ren H, Almeida GM, McGourty K, Bahar MW, Stuart DI, Grimes JM, Graham SC, Smith GL PLoS Pathog. 2011 Dec;7(12):e1002430. Epub 2011 Dec 15. PMID:22194685<ref>PMID:22194685</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 4bbc" style="background-color:#fffaf0;"></div>

==See Also==
*[[B-cell lymphoma proteins 3D structures|B-cell lymphoma proteins 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Vaccinia virus Western Reserve]]
[[Category: Bahar MW]]
[[Category: Cooray S]]
[[Category: Graham SC]]
[[Category: Grimes JM]]
[[Category: Maluquer de Motes C]]
[[Category: McGourty K]]
[[Category: Ren H]]
[[Category: Smith GL]]
[[Category: Stuart DI]]