Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
SFTSV NSs protein is a tick antiviral RNAi response suppressor. |
| Συγγραφείς: |
Fares, Mazigh, McFarlane, Melanie, Parry, Rhys H., Arif, Rozeena, Clarke, Andrew T., Kamel, Wael, Davies, Kelsey, Datta-Savage, Riona, Schwarz-Linek, Ulrich, Bell-Sakyi, Lesley, Petit, Marine J., Schnettler, Esther, Castello, Alfredo, Kohl, Alain, Brennan, Benjamin |
| Πηγή: |
Proceedings of the National Academy of Sciences of the United States of America; 5/19/2026, Vol. 123 Issue 20, p1-12, 40p |
| Θεματικοί όροι: |
RNA interference, Viral proteins, Small interfering RNA, Virus diseases, Viral replication, Arthropod vectors |
| Περίληψη: |
Severe fever with thrombocytopenia syndrome virus (SFTSV) is an emerging tick-borne phenuivirus causing high mortality in humans. While the nonstructural protein NSs is dispensable for replication in interferon-deficient mammalian cells, we demonstrate that NSs is essential for viral replication in tick cells. SFTSV infection triggers canonical Dicer-2-mediated antiviral RNA interference (RNAi) in tick cells, producing virus-derived small interfering RNAs (siRNAs) that target viral transcripts for degradation. We show that NSs functions as a viral suppressor of RNAi by selectively engaging and depleting single-stranded RNAs derived from 22-nucleotide siRNAs, likely limiting their incorporation into RNA-induced silencing complexes (RISC). Complementation with a heterologous RNAi suppressor (p19 protein) partially rescues replication of NSs-deficient virus, validating the RNAi-suppressive function of NSs. These findings reveal that successful tick-borne viral replication requires host-specific immune evasion strategies and establish NSs-mediated RNAi suppression as essential for SFTSV persistence in arthropod vectors. [ABSTRACT FROM AUTHOR] |
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| Βάση Δεδομένων: |
Complementary Index |