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An in vitro network of intermolecular interactions between viral RNA segments of an avian H5N2 influenza A virus: comparison with a human H3N2 virus.

Identifieur interne : 000132 ( France/Analysis ); précédent : 000131; suivant : 000133

An in vitro network of intermolecular interactions between viral RNA segments of an avian H5N2 influenza A virus: comparison with a human H3N2 virus.

Auteurs : Cyrille Gavazzi [France] ; Catherine Isel [France] ; Emilie Fournier [France] ; Vincent Moules [France] ; Annie Cavalier [France] ; Daniel Thomas [France] ; Bruno Lina [France] ; Roland Marquet [France]

Source :

RBID : Hal:inserm-00870461

Abstract

The genome of influenza A viruses (IAV) is split into eight viral RNAs (vRNAs) that are encapsidated as viral ribonucleoproteins. The existence of a segment-specific packaging mechanism is well established, but the molecular basis of this mechanism remains to be deciphered. Selective packaging could be mediated by direct interaction between the vRNA packaging regions, but such interactions have never been demonstrated in virions. Recently, we showed that the eight vRNAs of a human H3N2 IAV form a single interaction network in vitro that involves regions of the vRNAs known to contain packaging signals in the case of H1N1 IAV strains. Here, we show that the eight vRNAs of an avian H5N2 IAV also form a single network of interactions in vitro, but, interestingly, the interactions and the regions of the vRNAs they involve differ from those described for the human H3N2 virus. We identified the vRNA sequences involved in five of these interactions at the nucleotide level, and in two cases, we validated the existence of the interaction using compensatory mutations in the interacting sequences. Electron tomography also revealed significant differences in the interactions taking place between viral ribonucleoproteins in H5N2 and H3N2 virions, despite their canonical '7 + 1' arrangement.


Url:
DOI: 10.1093/nar/gks1181


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Hal:inserm-00870461

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<title xml:lang="en">An in vitro network of intermolecular interactions between viral RNA segments of an avian H5N2 influenza A virus: comparison with a human H3N2 virus.</title>
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<name sortKey="Isel, Catherine" sort="Isel, Catherine" uniqKey="Isel C" first="Catherine" last="Isel">Catherine Isel</name>
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<name sortKey="Lina, Bruno" sort="Lina, Bruno" uniqKey="Lina B" first="Bruno" last="Lina">Bruno Lina</name>
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<name sortKey="Marquet, Roland" sort="Marquet, Roland" uniqKey="Marquet R" first="Roland" last="Marquet">Roland Marquet</name>
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<idno type="DOI">10.1093/nar/gks1181</idno>
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<title level="j">Nucleic Acids Research</title>
<idno type="ISSN">0305-1048</idno>
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<date type="datePub">2013-01</date>
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<p>The genome of influenza A viruses (IAV) is split into eight viral RNAs (vRNAs) that are encapsidated as viral ribonucleoproteins. The existence of a segment-specific packaging mechanism is well established, but the molecular basis of this mechanism remains to be deciphered. Selective packaging could be mediated by direct interaction between the vRNA packaging regions, but such interactions have never been demonstrated in virions. Recently, we showed that the eight vRNAs of a human H3N2 IAV form a single interaction network in vitro that involves regions of the vRNAs known to contain packaging signals in the case of H1N1 IAV strains. Here, we show that the eight vRNAs of an avian H5N2 IAV also form a single network of interactions in vitro, but, interestingly, the interactions and the regions of the vRNAs they involve differ from those described for the human H3N2 virus. We identified the vRNA sequences involved in five of these interactions at the nucleotide level, and in two cases, we validated the existence of the interaction using compensatory mutations in the interacting sequences. Electron tomography also revealed significant differences in the interactions taking place between viral ribonucleoproteins in H5N2 and H3N2 virions, despite their canonical '7 + 1' arrangement.</p>
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<name sortKey="Lina, Bruno" sort="Lina, Bruno" uniqKey="Lina B" first="Bruno" last="Lina">Bruno Lina</name>
<name sortKey="Marquet, Roland" sort="Marquet, Roland" uniqKey="Marquet R" first="Roland" last="Marquet">Roland Marquet</name>
<name sortKey="Moules, Vincent" sort="Moules, Vincent" uniqKey="Moules V" first="Vincent" last="Moules">Vincent Moules</name>
<name sortKey="Thomas, Daniel" sort="Thomas, Daniel" uniqKey="Thomas D" first="Daniel" last="Thomas">Daniel Thomas</name>
</country>
</tree>
</affiliations>
</record>

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