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==Crystal Structure of the G3BP1 NTF2-like domain bound to the IDR1 of SARS-CoV-2 nucleocapsid protein==
<StructureSection load='7suo' size='340' side='right'caption='[[7suo]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7suo]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndrome_coronavirus_2 Severe acute respiratory syndrome coronavirus 2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7SUO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7SUO FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.35&#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=7suo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7suo OCA], [https://pdbe.org/7suo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7suo RCSB], [https://www.ebi.ac.uk/pdbsum/7suo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7suo ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/G3BP1_HUMAN G3BP1_HUMAN] May be a regulated effector of stress granule assembly. Phosphorylation-dependent sequence-specific endoribonuclease in vitro. Cleaves exclusively between cytosine and adenine and cleaves MYC mRNA preferentially at the 3'-UTR. ATP- and magnesium-dependent helicase. Unwinds preferentially partial DNA and RNA duplexes having a 17 bp annealed portion and either a hanging 3' tail or hanging tails at both 5'- and 3'-ends. Unwinds DNA/DNA, RNA/DNA, and RNA/RNA substrates with comparable efficiency. Acts unidirectionally by moving in the 5' to 3' direction along the bound single-stranded DNA.<ref>PMID:9889278</ref> <ref>PMID:11604510</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Stress granule (SG) formation mediated by Ras GTPase-activating protein-binding protein 1 (G3BP1) constitutes a key obstacle for viral replication, which makes G3BP1 a frequent target for viruses. For instance, the SARS-CoV-2 nucleocapsid (N) protein interacts with G3BP1 directly to suppress SG assembly and promote viral production. However, the molecular basis for the SARS-CoV-2 N - G3BP1 interaction remains elusive. Here we report biochemical and structural analyses of the SARS-CoV-2 N - G3BP1 interaction, revealing differential contributions of various regions of SARS-CoV-2 N to G3BP1 binding. The crystal structure of the NTF2-like domain of G3BP1 (G3BP1(NTF2)) in complex with a peptide derived from SARS-CoV-2 N (residues 1-25, N(1-25)) reveals that SARS-CoV-2 N(1-25) occupies a conserved surface groove of G3BP1(NTF2) via surface complementarity. We show that a phi-x-F (phi, hydrophobic residue) motif constitutes the primary determinant for G3BP1(NTF2)-targeting proteins, while the flanking sequence underpins diverse secondary interactions. We demonstrate that mutation of key interaction residues of the SARS-CoV-2 N(1-25) - G3BP1(NTF2) complex leads to disruption of the SARS-CoV-2 N - G3BP1 interaction in vitro. Together, these results provide a molecular basis of the strain-specific interaction between SARS-CoV-2 N and G3BP1, which has important implications for the development of novel therapeutic strategies against SARS-CoV-2 infection.

SARS-CoV-2 Nucleocapsid Protein Targets a Conserved Surface Groove of the NTF2-like Domain of G3BP1.,Biswal M, Lu J, Song J J Mol Biol. 2022 May 15;434(9):167516. doi: 10.1016/j.jmb.2022.167516. Epub 2022 , Feb 28. PMID:35240128<ref>PMID:35240128</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 7suo" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Severe acute respiratory syndrome coronavirus 2]]
[[Category: Biswal M]]
[[Category: Lu J]]
[[Category: Song J]]