Key result
NS RNA mutations G123A and A132G alter early NS1 protein expression during influenza infection.
Why the study?
RNA secondary structure regions in the influenza virus NS segment are predicted to vary in thermodynamic stability, but their role in NS1 protein expression remained to be defined.
Mutations affecting RNA secondary structure in the NS segment of influenza virus influence NS1 protein expression during early infection.
RNA secondary structures play a key role in splicing, gene expression, microRNA biogenesis, RNA editing, and other biological processes. The importance of RNA structures has been demonstrated in the life cycle of RNA-containing viruses, including the influenza virus. At least two regions of conserved secondary structure in NS segment (+) RNA are predicted to vary among influenza virus strains with respect to thermodynamic stability; both fall in the NS1 open reading frame. The NS1 protein is involved in multiple virus-host interaction processes, and its main function is to inhibit the cellular immune response to viral infection. Using a reverse genetics approach, four influenza virus strains were constructed featuring mutations that have different effects on RNA secondary structure. Growth curve experiments and ELISA data show that, at least in the first viral replication cycle, mutations G123A and A132G affecting RNA structure in the (82-148) NS RNA region influence NS1 protein expression.
No takes yet. Share an insight, caveat, or question.
Baranovskaya et al. (2019) studied Influenza A virus infection. Mutations affecting NS RNA secondary structure (G123A and A132G) vs. Original RNA secondary structure was evaluated on NS1 protein expression and viral growth kinetics. Mutations G123A and A132G affecting RNA secondary structure in the 82-148 NS RNA region significantly influence NS1 protein expression during the early stages of influenza virus infection.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: