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  • Title: Promotion of vesicular stomatitis virus fusion by the endosome-specific phospholipid bis(monoacylglycero)phosphate (BMP).
    Author: Roth SL, Whittaker GR.
    Journal: FEBS Lett; 2011 Mar 23; 585(6):865-9. PubMed ID: 21333650.
    Abstract:
    Vesicular stomatitis virus (VSV) is a prototypic virus commonly used in studies of endocytosis and membrane trafficking. One proposed mechanism for VSV entry involves initial fusion with internal vesicles of multivesicular endosomes followed by back-fusion of these vesicles into the cytoplasm. One feature of endosomal internal vesicles is that they contain the lipid bis(monoacylglycero)phosphate (BMP). Here, we show that the presence of BMP significantly increases the rate of VSV G-mediated membrane fusion. The increased fusion was selective for VSV and was not evident for another enveloped virus, influenza virus. Our data provide a biological rationale for a two-step infection reaction during VSV entry, and suggest that BMP preferentially affects the ability of VSV G to mediate lipid mixing during membrane fusion.
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