2ihx: Difference between revisions
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New page: left|200px<br /><applet load="2ihx" size="350" color="white" frame="true" align="right" spinBox="true" caption="2ihx" /> '''Solution Structure of the Rous Sarcoma Virus... |
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== | ==Solution Structure of the Rous Sarcoma Virus Nucleocapsid Protein:uPsi RNA Packaging Signal Complex== | ||
The 5'-untranslated region (5'-UTR) of retroviral genomes contains | <StructureSection load='2ihx' size='340' side='right'caption='[[2ihx]]' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2ihx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Rous_sarcoma_virus Rous sarcoma virus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IHX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2IHX FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</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=2ihx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ihx OCA], [https://pdbe.org/2ihx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ihx RCSB], [https://www.ebi.ac.uk/pdbsum/2ihx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ihx ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/GAG_RSVP GAG_RSVP] Capsid protein p27 forms the spherical core of the virus that encapsulates the genomic RNA-nucleocapsid complex (By similarity). The aspartyl protease mediates proteolytic cleavages of Gag and Gag-Pol polyproteins during or shortly after the release of the virion from the plasma membrane. Cleavages take place as an ordered, step-wise cascade to yield mature proteins. This process is called maturation. Displays maximal activity during the budding process just prior to particle release from the cell (By similarity). | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ih/2ihx_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</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=2ihx ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The 5'-untranslated region (5'-UTR) of retroviral genomes contains elements required for genome packaging during virus assembly. For many retroviruses, the packaging elements reside in non-contiguous segments that span most or all of the 5'-UTR. The Rous sarcoma virus (RSV) is an exception, in that its genome can be packaged efficiently by a relatively short, 82 nt segment of the 5'-UTR called muPsi. The RSV 5'-UTR also contains three translational start codons (AUG-1, AUG-2 and AUG-3) that have been controvertibly implicated in translation initiation and genome packaging, one of which (AUG-3) resides within the muPsi sequence. We demonstrated recently that muPsi is capable of binding to the cognate RSV nucleocapsid protein (NC) with high affinity (dissociation constant K(d) approximately 2 nM), and that residues of AUG-3 are essential for tight binding. We now report the solution structure of the NC:muPsi complex, determined using NMR data obtained for samples containing ((13)C,(15)N)-labeled NC and (2)H-enriched, nucleotide-specifically protonated RNAs. Upon NC binding, muPsi adopts a stable secondary structure that consists of three stem loops (SL-A, SL-B and SL-C) and an 8 bp stem (O3). Binding is mediated by the two zinc knuckle domains of NC. The N-terminal knuckle interacts with a conserved U(217)GCG tetraloop (a member of the UNCG family; N=A,U,G or C), and the C-terminal zinc knuckle binds to residues that flank SL-A, including residues of AUG-3. Mutations of critical nucleotides in these sequences compromise or abolish viral infectivity. Our studies reveal novel structural features important for NC:RNA binding, and support the hypothesis that AUG-3 is conserved for genome packaging rather than translational control. | |||
Solution structure of the Rous sarcoma virus nucleocapsid protein: muPsi RNA packaging signal complex.,Zhou J, Bean RL, Vogt VM, Summers M J Mol Biol. 2007 Jan 12;365(2):453-67. Epub 2006 Oct 10. PMID:17070546<ref>PMID:17070546</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2ihx" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Rous sarcoma virus]] | [[Category: Rous sarcoma virus]] | ||
[[Category: Summers M]] | |||
[[Category: Summers | [[Category: Zhou J]] | ||
[[Category: Zhou | |||
