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Filamentous Influenza Virus Enters Cells via Macropinocytosis

Rossman, Jeremy S., Leser, George P., Lamb, Robert A. (2012) Filamentous Influenza Virus Enters Cells via Macropinocytosis. Journal of Virology, 86 (20). pp. 10950-10960. ISSN 0022-538X. (doi:10.1128/JVI.05992-11) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:31570)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
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-?m) 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
DOI/Identification number: 10.1128/JVI.05992-11
Subjects: Q Science
Divisions: Divisions > Division of Natural Sciences > Biosciences
Depositing User: Jeremy Rossman
Date Deposited: 11 Oct 2012 15:27 UTC
Last Modified: 24 May 2023 09:04 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/31570 (The current URI for this page, for reference purposes)

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