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Chimeric influenza virus hemagglutinin containing either the NH2 terminus or the COOH terminus of G protein of vesicular stomatitis virus is defective in transport to the cell surface.

Chimeric cDNA clones of influenza virus hemagglutinin (HA) were constructed in which the DNA encoding either the NH2 terminus or the COOH terminus of HA was replaced with that of a vesicular stomatitis virus G protein. The chimeric cDNAs (GHA or HAG) were expressed in CV1 cells using the simian virus 40 late replacement promoter. Both chimeric proteins are synthesized, glycosylated, and transported to the rough endoplasmic reticulum. These results show that the NH2-terminal sequences of vesicular stomatitis virus G protein can provide a signal function for translocation and the COOH-terminal sequences can provide the anchor function for the influenza virus HA, when substituted for similar sequences. However, the chimeric glycoproteins were not transported to the Golgi complex or the plasma membrane. The implication of these results in translocation, sorting, and transport processes is discussed.