2gu0

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[[Image:2gu0.gif|left|200px]]
 
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==Crystal Structure of Human Rotavirus NSP2 (Group C / Bristol Strain)==
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The line below this paragraph, containing "STRUCTURE_2gu0", creates the "Structure Box" on the page.
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<StructureSection load='2gu0' size='340' side='right'caption='[[2gu0]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[2gu0]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_rotavirus_C Human rotavirus C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GU0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2GU0 FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2gu0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2gu0 OCA], [https://pdbe.org/2gu0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2gu0 RCSB], [https://www.ebi.ac.uk/pdbsum/2gu0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2gu0 ProSAT]</span></td></tr>
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{{STRUCTURE_2gu0| PDB=2gu0 | SCENE= }}
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/NSP2_ROTHC NSP2_ROTHC] Involved in genome replication and packaging. Plays a crucial role, together with NSP5, in the formation of virus factories (viroplasms) which are large inclusions in the cytoplasm where replication intermediates are assembled and RNA replication takes place. Displays ssRNA binding, NTPase, RNA triphosphatase (RTPase) and ATP-independent helix-unwinding activity activities. The unwiding activity may prepare and organize plus-strand RNAs for packaging and replication by removing interfering secondary structures. Unlike typical helicases, NSP2 requires neither a divalent cation nor a nucleotide energy source for helix destabilization. The RTPase activity may account for the absence of the 5'-terminal gamma-phosphate on the minus-strands of dsRNA genome segments (By similarity).
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gu/2gu0_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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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=2gu0 ConSurf].
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<div style="clear:both"></div>
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'''Crystal Structure of Human Rotavirus NSP2 (Group C / Bristol Strain)'''
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==See Also==
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*[[Nonstructural protein 3D structures|Nonstructural protein 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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Viral inclusion bodies, or viroplasms, that form in rotavirus-infected cells direct replication and packaging of the segmented double-stranded RNA (dsRNA) genome. NSP2, one of two rotavirus proteins needed for viroplasm assembly, possesses NTPase, RNA-binding, and helix-unwinding activities. NSP2 of the rotavirus group causing endemic infantile diarrhea (group A) was shown to self-assemble into large doughnut-shaped octamers with circumferential grooves and deep clefts containing nucleotide-binding histidine triad (HIT)-like motifs. Here, we demonstrate that NSP2 of group C rotavirus, a group that fails to reassort with group A viruses, retains the unique architecture of the group A octamer but differs in surface charge distribution. By using an NSP2-dependent complementation system, we show that the HIT-dependent NTPase activity of NSP2 is necessary for dsRNA synthesis, but not for viroplasm formation. The complementation system also showed that despite the retention of the octamer structure and the HIT-like fold, group C NSP2 failed to rescue replication and viroplasm formation in NSP2-deficient cells infected with group A rotavirus. The distinct differences in the surface charges on the Bristol and SA11 NSP2 octamers suggest that charge complementarity of the viroplasm-forming proteins guides the specificity of viroplasm formation and, possibly, reassortment restriction between rotavirus groups.
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[[Category: Human rotavirus C]]
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[[Category: Large Structures]]
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==About this Structure==
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[[Category: Jiang X]]
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2GU0 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Human_rotavirus_(group_c/strain_bristol) Human rotavirus (group c/strain bristol)]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GU0 OCA].
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[[Category: Prasad BVV]]
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==Reference==
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Structure-function analysis of rotavirus NSP2 octamer by using a novel complementation system., Taraporewala ZF, Jiang X, Vasquez-Del Carpio R, Jayaram H, Prasad BV, Patton JT, J Virol. 2006 Aug;80(16):7984-94. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16873255 16873255]
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[[Category: Single protein]]
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[[Category: Jiang, X.]]
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[[Category: Prasad, B V.V.]]
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[[Category: Bristol]]
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[[Category: Hit motif]]
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[[Category: Nsp2]]
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[[Category: Rotavirus]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 05:32:12 2008''
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Current revision

Crystal Structure of Human Rotavirus NSP2 (Group C / Bristol Strain)

PDB ID 2gu0

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