Native mass spectrometry reveals the initial binding events of HIV-1 rev to RRE stem II RNA

Eva-Maria Schneeberger, Matthias Halper, Michael Palasser, Sarah Viola Heel, Jovana Vušurović, Raphael Plangger, Michael Juen, Christoph Kreutz and Kathrin Breuker ()
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Eva-Maria Schneeberger: University of Innsbruck
Matthias Halper: University of Innsbruck
Michael Palasser: University of Innsbruck
Sarah Viola Heel: University of Innsbruck
Jovana Vušurović: University of Innsbruck
Raphael Plangger: University of Innsbruck
Michael Juen: University of Innsbruck
Christoph Kreutz: University of Innsbruck
Kathrin Breuker: University of Innsbruck

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Nuclear export complexes composed of rev response element (RRE) ribonucleic acid (RNA) and multiple molecules of rev protein are promising targets for the development of therapeutic strategies against human immunodeficiency virus type 1 (HIV-1), but their assembly remains poorly understood. Using native mass spectrometry, we show here that rev initially binds to the upper stem of RRE IIB, from where it is relayed to binding sites that allow for rev dimerization. The newly discovered binding region implies initial rev recognition by nucleotides that are not part of the internal loop of RRE stem IIB RNA, which was previously identified as the preferred binding region. Our study highlights the unique capability of native mass spectrometry to separately study the binding interfaces of RNA/protein complexes of different stoichiometry, and provides a detailed understanding of the mechanism of RRE/rev association with implications for the rational design of potential drugs against HIV-1 infection.

Date: 2020
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DOI: 10.1038/s41467-020-19144-7

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