7suo

Crystal Structure of the G3BP1 NTF2-like domain bound to the IDR1 of SARS-CoV-2 nucleocapsid protein

spinqualitylabelsall models 7suo, resolution 2.35Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7suo is a 4 chain structure with sequence from Homo sapiens and Severe acute respiratory syndrome coronavirus 2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.35Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function 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. 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 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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