Article ; Online: Interaction between host G3BP and viral nucleocapsid protein regulates SARS-CoV-2 replication and pathogenicity.
2024 Volume 43, Issue 3, Page(s) 113965
Abstract: G3BP1/2 are paralogous proteins that promote stress granule formation in response to cellular stresses, including viral infection. The nucleocapsid (N) protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) inhibits stress granule ... ...
Abstract | G3BP1/2 are paralogous proteins that promote stress granule formation in response to cellular stresses, including viral infection. The nucleocapsid (N) protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) inhibits stress granule assembly and interacts with G3BP1/2 via an ITFG motif, including residue F17, in the N protein. Prior studies examining the impact of the G3PB1-N interaction on SARS-CoV-2 replication have produced inconsistent findings, and the role of this interaction in pathogenesis is unknown. Here, we use structural and biochemical analyses to define the residues required for G3BP1-N interaction and structure-guided mutagenesis to selectively disrupt this interaction. We find that N-F17A mutation causes highly specific loss of interaction with G3BP1/2. SARS-CoV-2 N-F17A fails to inhibit stress granule assembly in cells, has decreased viral replication, and causes decreased pathology in vivo. Further mechanistic studies indicate that the N-F17-mediated G3BP1-N interaction promotes infection by limiting sequestration of viral genomic RNA (gRNA) into stress granules. |
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MeSH term(s) | Humans ; SARS-CoV-2/genetics ; DNA Helicases/metabolism ; RNA Helicases/metabolism ; RNA Recognition Motif Proteins/metabolism ; Poly-ADP-Ribose Binding Proteins/metabolism ; Virulence ; COVID-19 ; RNA, Guide, CRISPR-Cas Systems ; Nucleocapsid Proteins ; Virus Replication ; RNA, Viral/genetics |
Chemical Substances | DNA Helicases (EC 3.6.4.-) ; RNA Helicases (EC 3.6.4.13) ; RNA Recognition Motif Proteins ; Poly-ADP-Ribose Binding Proteins ; RNA, Guide, CRISPR-Cas Systems ; Nucleocapsid Proteins ; RNA, Viral ; G3BP1 protein, human (EC 3.6.4.12) |
Language | English |
Publishing date | 2024-03-15 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 2649101-1 |
ISSN | 2211-1247 ; 2211-1247 |
ISSN (online) | 2211-1247 |
ISSN | 2211-1247 |
DOI | 10.1016/j.celrep.2024.113965 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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