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. 1993 Nov;67(11):6499–6506. doi: 10.1128/jvi.67.11.6499-6506.1993

Incorporation of human immunodeficiency virus type 1 Gag proteins into murine leukemia virus virions.

C A Deminie 1, M Emerman 1
PMCID: PMC238086  PMID: 8411353

Abstract

The retroviral Gag polyprotein is necessary and sufficient for assembly and budding of viral particles. However, the exact inter- and intramolecular interactions of the Gag polyproteins during this process are not known. To locate functional domains within Gag, we generated chimeric proviruses between human immunodeficiency virus type 1 (HIV-1) and murine leukemia virus (MuLV). In these chimeric proviruses, the matrix or capsid proteins of MuLV were precisely replaced with the matrix or capsid proteins of HIV-1. Although the chimeric proviruses were unable to efficiently assemble into mature viral particles by themselves, coexpression of wild-type MuLV Gag rescued the HIV proteins into virions. The specificity of the rescue of HIV proteins into MuLV virions shows that specific interactions involving homologous matrix or capsid regions of Gag are necessary for retroviral particle formation.

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Selected References

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