Selective flexible packaging pathways of the segmented genome of influenza A virus

Ivan Haralampiev, Simon Prisner, Mor Nitzan, Matthias Schade, Fabian Jolmes, Max Schreiber, Maria Loidolt-Krüger, Kalle Jongen, Jasmine Chamiolo, Niklaas Nilson, Franziska Winter, Nir Friedman, Oliver Seitz, Thorsten Wolff, Andreas Herrmann*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

The genome of influenza A viruses (IAV) is encoded in eight distinct viral ribonucleoproteins (vRNPs) that consist of negative sense viral RNA (vRNA) covered by the IAV nucleoprotein. Previous studies strongly support a selective packaging model by which vRNP segments are bundling to an octameric complex, which is integrated into budding virions. However, the pathway(s) generating a complete genome bundle is not known. We here use a multiplexed FISH assay to monitor all eight vRNAs in parallel in human lung epithelial cells. Analysis of 3.9 × 105 spots of colocalizing vRNAs provides quantitative insights into segment composition of vRNP complexes and, thus, implications for bundling routes. The complexes rarely contain multiple copies of a specific segment. The data suggest a selective packaging mechanism with limited flexibility by which vRNPs assemble into a complete IAV genome. We surmise that this flexibility forms an essential basis for the development of reassortant viruses with pandemic potential.

Original languageAmerican English
Article number4355
JournalNature Communications
Volume11
Issue number1
DOIs
StatePublished - 1 Dec 2020

Bibliographical note

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© 2020, The Author(s).

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