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J. Virol., Oct 1997, 7996-8000, Vol 71, No. 10
D Odell, E Wanas, J Yan and HP Ghosh
Chimeric proteins in which the transmembrane anchoring sequence (TM) or
both the TM and the cytoplasmic tail (CT) of vesicular stomatitis virus
glycoprotein G were replaced with corresponding domains of viral or
cellular integral membrane proteins were used to examine the influence of
these domains on acidic-pH-induced membrane fusion by G protein. The TM and
CT of G were also replaced with the lipid anchor
glycosylphosphatidylinositol. Hybrids containing foreign TM or TM and CT
sequences were fusogenic at acidic pH but
glycosylphosphatidylinositol-anchored G was nonfusogenic at acidic pH. The
results suggest that the fusogenic activity of G protein requires membrane
anchoring by a hydrophobic peptide sequence and the specific amino acid
sequence of the TM has no influence on fusogenic activity.
Copyright © 1997, American Society for Microbiology
Influence of membrane anchoring and cytoplasmic domains on the fusogenic activity of vesicular stomatitis virus glycoprotein G
Department of Biochemistry, McMaster University, Hamilton, Ontario, Canada.
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