Oligoadenylate synthetase 1 displays dual antiviral mechanisms in driving translational shutdown and protecting interferon production.
Immunity
; 57(3): 446-461.e7, 2024 Mar 12.
Article
in En
| MEDLINE
| ID: mdl-38423012
ABSTRACT
In response to viral infection, how cells balance translational shutdown to limit viral replication and the induction of antiviral components like interferons (IFNs) is not well understood. Moreover, how distinct isoforms of IFN-induced oligoadenylate synthetase 1 (OAS1) contribute to this antiviral response also requires further elucidation. Here, we show that human, but not mouse, OAS1 inhibits SARS-CoV-2 replication through its canonical enzyme activity via RNase L. In contrast, both mouse and human OAS1 protect against West Nile virus infection by a mechanism distinct from canonical RNase L activation. OAS1 binds AU-rich elements (AREs) of specific mRNAs, including IFNß. This binding leads to the sequestration of IFNß mRNA to the endomembrane regions, resulting in prolonged half-life and continued translation. Thus, OAS1 is an ARE-binding protein with two mechanisms of antiviral activity driving inhibition of translation but also a broader, non-canonical function of protecting IFN expression from translational shutdown.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Oligoribonucleotides
/
West Nile Fever
/
2',5'-Oligoadenylate Synthetase
/
Virus Diseases
/
Interferons
Limits:
Animals
/
Humans
Language:
En
Journal:
Immunity
Journal subject:
ALERGIA E IMUNOLOGIA
Year:
2024
Document type:
Article
Affiliation country:
Estados Unidos
Country of publication:
Estados Unidos