View source for 7lhd


==The complete model of phage Qbeta virion==
<StructureSection load='7lhd' size='340' side='right'caption='[[7lhd]], [[Resolution|resolution]] 4.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7lhd]] is a 182 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_virus_Qbeta Escherichia virus Qbeta]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7LHD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7LHD 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]] 4.6&#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=7lhd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7lhd OCA], [https://pdbe.org/7lhd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7lhd RCSB], [https://www.ebi.ac.uk/pdbsum/7lhd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7lhd ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MATA2_BPQBE MATA2_BPQBE] Induces host cell lysis (PubMed:11892805). Inhibits host MurA activity thereby blocking the synthesis of murein precursors necessary for the host cell wall biosynthesis (PubMed:11423662). May be responsible for the attachment to the host pilus. Makes extensive contacts with the viral genome (PubMed:28111107).<ref>PMID:11423662</ref> <ref>PMID:11892805</ref> <ref>PMID:23329676</ref> <ref>PMID:28111107</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The coat proteins (CPs) of single-stranded RNA bacteriophages (ssRNA phages) directly assemble around the genomic RNA (gRNA) to form a near-icosahedral capsid with a single maturation protein (Mat) that binds the gRNA and interacts with the retractile pilus during infection of the host. Understanding the assembly of ssRNA phages is essential for their use in biotechnology, such as RNA protection and delivery. Here, we present the complete gRNA model of the ssRNA phage Qbeta, revealing that the 3' untranslated region binds to the Mat and the 4127 nucleotides fold domain-by-domain, and is connected through long-range RNA-RNA interactions, such as kissing loops. Thirty-three operator-like RNA stem-loops are located and primarily interact with the asymmetric A/B CP-dimers, suggesting a pathway for the assembly of the virions. Additionally, we have discovered various forms of the virus-like particles (VLPs), including the canonical T = 3 icosahedral, larger T = 4 icosahedral, prolate, oblate forms, and a small prolate form elongated along the 3-fold axis. These particles are all produced during a normal infection, as well as when overexpressing the CPs. When overexpressing the shorter RNA fragments encoding only the CPs, we observed an increased percentage of the smaller VLPs, which may be sufficient to encapsidate a shorter RNA.

Structural Assembly of Qbeta Virion and Its Diverse Forms of Virus-like Particles.,Chang JY, Gorzelnik KV, Thongchol J, Zhang J Viruses. 2022 Jan 24;14(2). pii: v14020225. doi: 10.3390/v14020225. PMID:35215818<ref>PMID:35215818</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7lhd" style="background-color:#fffaf0;"></div>

==See Also==
*[[Virus coat proteins 3D structures|Virus coat proteins 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia virus Qbeta]]
[[Category: Large Structures]]
[[Category: Chang JY]]
[[Category: Zhang J]]