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==1.45 Angstrom Resolution Crystal Structure of C-terminal Dimerization Domain of Nucleocapsid Phosphoprotein from SARS-CoV-2==
<StructureSection load='6yun' size='340' side='right'caption='[[6yun]], [[Resolution|resolution]] 1.44&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6yun]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/2019-ncov 2019-ncov]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6YUN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6YUN FirstGlance]. <br>
</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=6yun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6yun OCA], [https://pdbe.org/6yun PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6yun RCSB], [https://www.ebi.ac.uk/pdbsum/6yun PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6yun ProSAT]</span></td></tr>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/NCAP_SARS2 NCAP_SARS2]] Packages the positive strand viral genome RNA into a helical ribonucleocapsid (RNP) and plays a fundamental role during virion assembly through its interactions with the viral genome and membrane protein M. Plays an important role in enhancing the efficiency of subgenomic viral RNA transcription as well as viral replication. 
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== Publication Abstract from PubMed ==
Unprecedented by number of casualties and socio-economic burden occurring worldwide, the coronavirus disease 2019 (Covid-19) pandemic caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the worst health crisis of this century. In order to develop adequate countermeasures against Covid-19, identification and structural characterization of suitable antiviral targets within the SARS-CoV-2 protein repertoire is urgently needed. The nucleocapsid phosphoprotein (N) is a multifunctional and highly immunogenic determinant of virulence and pathogenicity, whose main functions consist in oligomerizing and packaging the single-stranded RNA (ssRNA) viral genome. Here we report the structural and biophysical characterization of the SARS-CoV-2 N C-terminal domain (CTD), on which both N homo-oligomerization and ssRNA binding depend. Crystal structures solved at 1.44 A and 1.36 A resolution describe a rhombus-shape N CTD dimer, which stably exists in solution as validated by size-exclusion chromatography coupled to multi-angle light scattering and analytical ultracentrifugation. Differential scanning fluorimetry revealed moderate thermal stability and a tendency towards conformational change. Microscale thermophoresis demonstrated binding to a 7-bp SARS-CoV-2 genomic ssRNA fragment at micromolar affinity. Furthermore, a low-resolution preliminary model of the full-length SARS-CoV N in complex with ssRNA, obtained by cryo-electron microscopy, provides an initial understanding of self-associating and RNA binding functions exerted by the SARS-CoV-2 N.

High-resolution structure and biophysical characterization of the nucleocapsid phosphoprotein dimerization domain from the Covid-19 severe acute respiratory syndrome coronavirus 2.,Zinzula L, Basquin J, Bohn S, Beck F, Klumpe S, Pfeifer G, Nagy I, Bracher A, Hartl FU, Baumeister W Biochem Biophys Res Commun. 2020 Oct 3. pii: S0006-291X(20)31884-2. doi:, 10.1016/j.bbrc.2020.09.131. PMID:33039147<ref>PMID:33039147</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 6yun" style="background-color:#fffaf0;"></div>

==See Also==
*[[Nucleoprotein 3D structures|Nucleoprotein 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: 2019-ncov]]
[[Category: Large Structures]]
[[Category: Basquin, J]]
[[Category: Bracher, A]]
[[Category: Nagy, I]]
[[Category: Zinzula, L]]
[[Category: Sars-cov-2 covid-19 nucleocapsid phosphoprotein]]
[[Category: Viral protein]]