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Fusion of reconstituted influenza virus envelopes with liposomes mediated by streptavidin/biotin interactions

Fusion of reconstituted influenza virus envelopes with liposomes mediated by streptavidin/biotin interactions

Febs Letters 390(3): 315-318

Reconstituted influenza virus envelopes (virosomes) containing the viral hemagglutinin (HA) represent in efficient fusogenic cellular delivery system. By interaction of HA with its natural receptors, sialylated lipids (gangliosides) or proteins, virosomes bind to cells and, following endocytic uptake, deliver their contents to the cytosol through fusion from within acidic endosomes. Here, we show that binding to sialic acid is not necessary for fusion. In the presence of streptavidin, virosomes containing a biotinylated lipid fused with liposomes lacking sialic acid if these liposomes also had a biotinylated lipid in their membranes. Moreover, fusion characteristics corresponded well with fusion of virosomes with ganglioside-containing liposomes.

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Accession: 008714031

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PMID: 8706885

DOI: 10.1016/0014-5793(96)00682-5

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