Destabilization of the RB tumor suppressor protein and stabilization of p53 contribute to HPV type 16 E7-induced apoptosis.

Abstract:

:Cells that express the human papillomavirus (HPV) type 16 E7 oncoprotein are predisposed to undergo apoptosis. Transgenic mice that have E7 expression targeted to either the retinal photoreceptor cells or the lens cells exhibit signs of apoptosis in cells attempting to undergo differentiation. We established a cell culture system to study this process and have determined the domains of E7 that are required for predisposing cells to undergo apoptosis in response to growth arrest signals. Regions within the core pRB binding site of E7 were necessary but not sufficient for inducing apoptosis. Residues within the adenovirus conserved region 1 homology domain and the consensus casein kinase II phosphorylation site are also important for this effect on cell viability. Our data also demonstrate that the ability of E7 to induce destabilization of pRB and stabilization of p53 coincides with E7-mediated transformation and apoptosis.

journal_name

Virology

journal_title

Virology

authors

Jones DL,Thompson DA,Münger K

doi

10.1006/viro.1997.8851

subject

Has Abstract

pub_date

1997-12-08 00:00:00

pages

97-107

issue

1

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(97)98851-6

journal_volume

239

pub_type

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