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. 1981 Apr;38(1):125–135. doi: 10.1128/jvi.38.1.125-135.1981

Structure of the provirus within NIH 3T3 cells transfected with Harvey sarcoma virus DNA.

M P Goldfarb, R A Weinberg
PMCID: PMC171132  PMID: 7241646

Abstract

NIH 3T3 cells transformed with unintegrated Harvey sarcoma virus (HSV) linear DNA generally acquired a complete HSV provirus. Infection of these transformed cells with Moloney murine leukemia helper virus was followed by release of infectious particles. The HSV provirus within these transfected cells was convalently joined to nonviral DNA sequences and was termed "cell-linked" HSV DNA. The association of this cell-virus DNA sequence with the chromosomal DNA of a transfected cell was unclear. NIH 3T3 cells could also become transformed by transfection with this cell-linked HSV DNA. In this case, the recipient cells generally acquired a donor DNA fragment containing both the HSV provirus and its flanking nonviral sequences. After cells acquired either unintegrated or cell-linked HSV DNA, the newly established provirus and flanking cellular sequences underwent amplifications to between 5 and 100 copies per diploid cell. NIH 3T3 cells transfected with HSV DNA may acquire deleted proviral DNA lacking at least 1.3 kilobase pairs from the right end of full-length HSV 6-kilobase-pair DNA (corresponding to the 3'-proximal portion of wild-type HSV RNA). Cells bearing such deleted HSV genomes were transformed, indicating that the viral transformation gene lies in the middle or 5'-proximal portion of the HSV RNA genome. However, when these cells were infected with Moloney murine leukemia helper virus, only low levels of biologically active sarcoma virus particles were released. Therefore, the 3' end of full-length HSV RNA was required for efficient transmission of the viral genome.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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