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. 1991 Mar;65(3):1202–1207. doi: 10.1128/jvi.65.3.1202-1207.1991

Pseudotype formation of murine leukemia virus with the G protein of vesicular stomatitis virus.

N Emi 1, T Friedmann 1, J K Yee 1
PMCID: PMC239887  PMID: 1847450

Abstract

Mixed infection of a cell by vesicular stomatitis virus (VSV) and retroviruses results in the production of progeny virions bearing the genome of one virus encapsidated by the envelope proteins of the other. The mechanism for the phenomenon of pseudotype formation is not clear, although specific recognition of a viral envelope protein by the nucleocapsid of an unrelated virus is presumably involved. In this study, we used Moloney murine leukemia virus (MoMLV)-based retroviral vectors encoding the gene for neomycin phosphotransferase to investigate the interaction between the VSV G protein and the retroviral nucleocapsid during the formation of MoMLV(VSV) pseudotypes. Our results show that VSV G protein can be incorporated into the virions of retrovirus in the absence of other VSV-encoded proteins or of retroviral envelope protein. Infection of hamster cells by MoMLV(VSV) pseudotypes gave rise to neomycin phosphotransferase-resistant colonies, and addition of anti-VSV serum to the virus preparations completely abolished the infectivity of MoMLV(VSV) pseudotypes. It should be possible to use existing mutants of VSV G protein in the system described here to identify the signals that are important for the formation of MoMLV(VSV) pseudotypes.

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Selected References

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