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Curvature Sensing by a Viral Scission Protein
Univ Kent, Sch Biosci, Canterbury CT2 7NJ, Kent, England..
Stockholm Univ, Dept Biochem & Biophys, Ctr Biomembrane Res, SE-10691 Stockholm, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular Systems Biology. Stockholm Univ, Dept Biochem & Biophys, Ctr Biomembrane Res, SE-10691 Stockholm, Sweden..
Univ Kent, Sch Biosci, Canterbury CT2 7NJ, Kent, England..
2016 (English)In: Biochemistry, ISSN 0006-2960, E-ISSN 1520-4995, Vol. 55, no 25, 3493-3496 p.Article in journal (Refereed) PublishedText
Abstract [en]

Membrane scission is the final step in all budding processes wherein a membrane neck is sufficiently constricted so as to allow for fission and the release of the budded particle. For influenza viruses, membrane scission is mediated by an amphipathic helix (AH) domain in the viral M2 protein. While it is known that the M2AH alters membrane curvature, it is not known how the protein is localized to the center neck of budding virions where it would be able to cause membrane scission. Here, we use molecular dynamics simulations on buckled lipid bilayers to show that the M2AH senses membrane curvature and preferentially localizes to regions of high membrane curvature, comparable to that seen at the center neck of budding influenza viruses. These results were then validated using in vitro binding assays to show that the M2AH senses membrane curvature by detecting lipid packing defects in the membrane. Our results show that the M2AH senses membrane curvature and suggest that the AH domain may localize the protein at the viral neck where it can then mediate membrane scission and the release of budding viruses.

Place, publisher, year, edition, pages
2016. Vol. 55, no 25, 3493-3496 p.
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:uu:diva-300063DOI: 10.1021/acs.biochem.6b00539ISI: 000378973500001PubMedID: 27299375OAI: oai:DiVA.org:uu-300063DiVA: diva2:950759
Funder
EU, FP7, Seventh Framework Programme, FP7-PEOPLE-2012-CIG: 333955Wenner-Gren FoundationsSwedish Foundation for Strategic Research
Available from: 2016-08-02 Created: 2016-08-02 Last updated: 2016-08-02Bibliographically approved

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