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PMID:11119620

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Citation

Bohl, J, Hull, B and Vande Pol, SB (2001) Cooperative transformation and coexpression of bovine papillomavirus type 1 E5 and E7 proteins. J. Virol. 75:513-21

Abstract

Productively infected bovine fibropapillomas were examined for bovine papillomavirus type 1 (BPV-1) E7 localization. BPV-1 E7 was observed in the cytoplasm of basal and lower spinous epithelial cells, coexpressed in the cytoplasm of basal cells with the E5 oncoprotein. E7 was also observed in nucleoli throughout the basal and spinous layers but not in the granular cell layer. Ectopic expression of E7 in cultured epithelial cells gave rise to localization similar to that seen in productive fibropapillomas, with cytoplasmic and nucleolar expression observed. Consistent with the coexpression of E7 and E5 in basal keratinocytes, BPV-1 E7 cooperated with E5 as well as E6 in an anchorage independence transformation assay. While E5 is expressed in both basal and superficial differentiating keratinocytes, BPV-1 E7 is only observed in basal and lower spinous epithelial cells. Therefore, BPV-1 E7 may serve to modulate the cellular response of basal epithelial cells to E5 expression.

Links

PubMed PMC113944 Online version:10.1128/JVI.75.1.513-521.2001

Keywords

Animals; Cattle; Cell Transformation, Neoplastic; Immunohistochemistry; Mice; Oncogene Proteins, Viral/analysis; Oncogene Proteins, Viral/physiology; Papilloma/chemistry; Papilloma/virology; Rabbits; Transfection

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

BPV1:VE7

involved_in

GO:0019087: transformation of host cell by virus

ECO:0000314: direct assay evidence used in manual assertion

P

Seeded From UniProt

complete

BPV1:VE7

GO:0019087: transformation of host cell by virus

ECO:0000314:

P

Evidenced through western blot, shown in figure 1

complete
CACAO 6571

BPV1:VE5

involved_in

GO:0019087: transformation of host cell by virus

ECO:0000314: direct assay evidence used in manual assertion

P

Seeded From UniProt

complete

BPV1:VE5

GO:0019087: transformation of host cell by virus

ECO:0000314:

P

Figure 6 shows co-transforming actions of both E7, E6, and E5

complete
CACAO 6588


See also

References

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