View source for 6rrs


==T=3 MS2 Virus-like particle==
<StructureSection load='6rrs' size='340' side='right'caption='[[6rrs]], [[Resolution|resolution]] 3.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6rrs]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_virus_MS2 Escherichia virus MS2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6RRS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6RRS FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.9&#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=6rrs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6rrs OCA], [https://pdbe.org/6rrs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6rrs RCSB], [https://www.ebi.ac.uk/pdbsum/6rrs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6rrs ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CAPSD_BPMS2 CAPSD_BPMS2] Self-assembles to form the T=3 icosahedral virus shell that protects the viral nucleic acid. Acts as a translational repressor by binding with high specificity to a single stem-loop structure in the genomic RNA that contains the initiation codon of the gene for the viral replicase. Involved in virus assembly through the interaction between a capsid protein dimer and the multiple packaging signals present in the RNA genome.<ref>PMID:16531233</ref> <ref>PMID:18662904</ref> <ref>PMID:26608810</ref> <ref>PMID:8254664</ref> <ref>PMID:9245600</ref> <ref>PMID:9469847</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Bacteriophage MS2 is a positive-sense, single-stranded RNA virus encapsulated in an asymmetric T = 3 pseudo-icosahedral capsid. It infects Escherichia coli through the F-pilus, in which it binds through a maturation protein incorporated into its capsid. Cryogenic electron microscopy has previously shown that its genome is highly ordered within virions, and that it regulates the assembly process of the capsid. In this study, we have assembled recombinant MS2 capsids with non-genomic RNA containing the capsid incorporation sequence, and investigated the structures formed, revealing that T = 3, T = 4 and mixed capsids between these two triangulation numbers are generated, and resolving structures of T = 3 and T = 4 capsids to 4 A and 6 A respectively. We conclude that the basic MS2 capsid can form a mix of T = 3 and T = 4 structures, supporting a role for the ordered genome in favouring the formation of functional T = 3 virions.

Bacteriophage MS2 displays unreported capsid variability assembling T = 4 and mixed capsids.,de Martin Garrido N, Crone MA, Ramlaul K, Simpson PA, Freemont PS, Aylett CHS Mol Microbiol. 2020 Jan;113(1):143-152. doi: 10.1111/mmi.14406. Epub 2019 Nov 5. PMID:31618483<ref>PMID:31618483</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6rrs" style="background-color:#fffaf0;"></div>

==See Also==
*[[Virus coat proteins 3D structures|Virus coat proteins 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia virus MS2]]
[[Category: Large Structures]]
[[Category: Aylett CHS]]
[[Category: Crone MA]]
[[Category: Freemont PS]]
[[Category: Ramlaul K]]
[[Category: Simpson PA]]
[[Category: De Martin Garrido N]]