6wzq: Difference between revisions

<table><tr><td colspan='2'>[[6wzq]] is a 4 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=6WZQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6WZQ FirstGlance]. <br>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[6wxo|6wxo]]</div></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=6wzq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6wzq OCA], [https://pdbe.org/6wzq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6wzq RCSB], [https://www.ebi.ac.uk/pdbsum/6wzq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6wzq ProSAT]</span></td></tr>

[[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.  

The COVID-2019 pandemic is the most severe acute public health threat of the twenty-first century. To properly address this crisis with both robust testing and novel treatments, we require a deep understanding of the life cycle of the causative agent, the SARS-CoV-2 coronavirus. Here, we examine the architecture and self-assembly properties of the SARS-CoV-2 nucleocapsid protein, which packages viral RNA into new virions. We determined a 1.4 A resolution crystal structure of this protein's N2b domain, revealing a compact, intertwined dimer similar to that of related coronaviruses including SARS-CoV. While the N2b domain forms a dimer in solution, addition of the C-terminal spacer B/N3 domain mediates formation of a homotetramer. Using hydrogen-deuterium exchange mass spectrometry, we find evidence that at least part of this putatively disordered domain is structured, potentially forming an alpha-helix that self-associates and cooperates with the N2b domain to mediate tetramer formation. Finally, we map the locations of amino acid substitutions in the N protein from over 38,000 SARS-CoV-2 genome sequences. We find that these substitutions are strongly clustered in the protein's N2a linker domain, and that substitutions within the N1b and N2b domains cluster away from their functional RNA binding and dimerization interfaces. Overall, this work reveals the architecture and self-assembly properties of a key protein in the SARS-CoV-2 life cycle, with implications for both drug design and antibody-based testing.

Architecture and self-assembly of the SARS-CoV-2 nucleocapsid protein.,Ye Q, West AMV, Silletti S, Corbett KD Protein Sci. 2020 Sep;29(9):1890-1901. doi: 10.1002/pro.3909. Epub 2020 Aug 6. PMID:32654247<ref>PMID:32654247</ref>