Kang, H., Yang, Y., Liu, Y. et al. Coupling of polymerase-nucleoprotein-RNA in an influenza virus mini ribonucleoprotein complex. Nat Commun 16, 9741 (2025)
Influenza virus ribonucleoprotein complexes (RNPs), composed of the polymerase complex (FluPol), nucleoprotein (NP), and RNA, are essential for replication and transcription. We report atomic-resolution cryo-EM structures of mini-vRNPs in two states: FluPol located inside (State-In) or at the outer rim (State-Out) of the NP-RNA ring. In both states, the 5´ and 3´ termini of vRNA are bound to FluPol as previously reported. One NP (NP-0) contacts PA/PB1 of FluPol and binds the distal double-stranded vRNA promoter, with its D72-K90 loop inserting into the RNA fork; separated strands occupy NP-0 RNA-binding grooves. Grooves from other NPs form a continuous RNA-protective path, consistent with negative-strand RNA virus mechanisms. In State-In, interfaces for FluPol dimerization or Pol II interaction are blocked, but fully exposed in State-Out. These structures reveal detailed FluPol-NP-RNA coupling and suggest a conformational shift in RNPs during the viral life cycle.
See Also:
Latest articles in those days:
- T cell help is a limiting factor for rare anti-influenza memory B cells to reenter germinal centers and generate potent broadly neutralizing antibodies 1 days ago
- Wild birds drive the introduction, maintenance, and spread of H5N1 clade 2.3.4.4b high pathogenicity avian influenza viruses in Spain, 2021-2022 1 days ago
- [preprint]FluNexus: a versatile web platform for antigenic prediction and visualization of influenza A viruses 1 days ago
- Salpingitis and multiorgan lesions caused by highly pathogenic avian influenza A(H5N1) virus in a cat associated with consumption of recalled raw milk in California 1 days ago
- Detection of highly pathogenic avian influenza A(H5N1) virus 2.3.4.4b in alpacas 1 days ago
[Go Top] [Close Window]


