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. 1984 Dec;81(24):7880–7884. doi: 10.1073/pnas.81.24.7880

Identification of a second transforming region in bovine papillomavirus DNA.

J T Schiller, W C Vass, D R Lowy
PMCID: PMC392256  PMID: 6096867

Abstract

Bovine papillomavirus type 1 (BPV-1) has been used as a model for studying papillomavirus genetics because BPV-1 virions or BPV-1 genomic viral DNA efficiently induce morphologic transformation of certain cultured cells. Previous studies of BPV-1-induced transformation have found that a cloned 5.4-kilobase (kb) fragment (69T) of the genome is transforming and that a 2.3-kb segment from the 3' end of this fragment is also transforming if activated by a retroviral regulatory element (the long terminal repeat). We now report that 69T contains another transforming segment near its 5' end that can also be activated by a long terminal repeat. Since this second segment does not overlap the 3' transforming segment, we conclude that BPV-1 encodes at least two genes that can independently transform cultured cells. Mutational analysis of the 5' transforming segment suggests that the transforming gene of this segment lies within the E6 open reading frame. The two transforming segments differ in their biological activity in that the E6-containing fragment can transform C127 mouse cells but not NIH3T3 mouse cells, whereas the 3' fragment can transform both cell lines.

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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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