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Identification of the non-structural influenza A viral protein NS1A as a bona fide target of the Small Ubiquitin-like MOdifier by the use of dicistronic expression constructs



Identification of the non-structural influenza A viral protein NS1A as a bona fide target of the Small Ubiquitin-like MOdifier by the use of dicistronic expression constructs



Journal of Virological Methods 163(2): 498-504



The cellular SUMOylation system affects the function of numerous viral proteins. Hence, the identification of novel viral targets for the Small Ubiquitin-like MOdifier (SUMO) is key to our understanding of virus-host interactions. The data obtained in this study demonstrate that the non-structural influenza A viral protein NS1A is an authentic SUMO target through the use of a dicistronic expression plasmid containing SUMO (the modifier) and Ubc9 (the SUMO-conjugating enzyme) separated by an Internal Ribosomal Entry Site (IRES). This dual expression plasmid produces a robust increase in cellular SUMOylation, therefore facilitating the characterization of cellular and viral SUMO targets. The identification of NS1A as a bona fide SUMO target suggests, for the first time, a role for SUMOylation during influenza virus infection.

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Accession: 053672437

Download citation: RISBibTeXText

PMID: 19917317

DOI: 10.1016/j.jviromet.2009.11.010


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