Filamentous Influenza Virus Enters Cells via Macropinocytosis

Rossman, J. S. and Leser, G. P. and Lamb, R. A. (2012) Filamentous Influenza Virus Enters Cells via Macropinocytosis. Journal of Virology, 86 (20). pp. 10950-10960. ISSN 0022-538X. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1128/JVI.05992-11

Abstract

Influenza virus is pleiomorphic, producing both spherical (100-nm-diameter) and filamentous (100-nm by 20-μm) virions. While the spherical virions are known to enter host cells through exploitation of clathrin-mediated endocytosis, the entry pathway for filamentous virions has not been determined, though the existence of an alternative, non-clathrin-, non-caveolin-mediated entry pathway for influenza virus has been known for many years. In this study, we confirm recent results showing that influenza virus utilizes macropinocytosis as an alternate entry pathway. Furthermore, we find that filamentous influenza viruses use macropinocytosis as the primary entry mechanism. Virions enter cells as intact filaments within macropinosomes and are trafficked to the acidic late-endosomal compartment. Low pH triggers a conformational change in the M2 ion channel protein, altering membrane curvature and leading to a fragmentation of the filamentous virions. This fragmentation may enable more-efficient fusion between the viral and endosomal membranes.

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: Jeremy Rossman
Date Deposited: 11 Oct 2012 15:27
Last Modified: 12 Jun 2013 09:04
Resource URI: http://kar.kent.ac.uk/id/eprint/31570 (The current URI for this page, for reference purposes)
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