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The fusogenic envelope glycoprotein G of the rhabdovirus vesicular stomatitis virus (VSV) induces membrane fusion at acidic pH. At acidic pH the G protein undergoes a major structural reorganization leading to the fusogenic conformation. However, unlike other viral fusion proteins, the low-pH-induced conformational change of VSV G is completely reversible. As well, the presence of an α-helical coiled-coil...
To elucidate the role of the fusion peptide in influenza hemagglutinin (HA)-mediated fusion, we compared pH-dependent conformational changes and fusion mediated by wild-type and a mutant HA in which Glu residues at positions 11 and 15 of the fusion peptide are substituted for valine. The pH dependence of conformational changes and kinetics of fusion with erythrocytes was the same for both forms of...
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