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- W2000991672 abstract "ABSTRACT Human papillomavirus type 16 (HPV16) and other high-risk HPVs are etiologically linked to the development of cervical carcinomas and contribute to a number of other tumors of the anogenital tract, as well as oral cancers. The high-risk HPV E6 and E7 oncoproteins are consistently expressed in cervical cancer cells and are necessary for the induction and maintenance of the transformed phenotype. An important aspect of HPV16 E7's oncogenic activities is destabilization of the retinoblastoma tumor suppressor (pRB) through a ubiquitin/proteasome-dependent mechanism, although the exact molecular mechanism is unknown. Here, we report that HPV16 E7 is associated with an enzymatically active cullin 2 ubiquitin ligase complex and that the HPV16 E7/pRB complex contains cullin 2. Depletion of cullin 2 by RNA interference causes increased steady-state levels and stability of pRB in HPV16 E7-expressing cells, and ectopic expression of HPV16 E7 and the cullin 2 complex leads to pRB ubiquitination in vivo. Hence, we propose that the HPV16 E7-associated cullin 2 ubiquitin ligase complex contributes to aberrant degradation of the pRB tumor suppressor in HPV16 E7-expressing cells." @default.
- W2000991672 created "2016-06-24" @default.
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- W2000991672 date "2007-09-15" @default.
- W2000991672 modified "2023-10-17" @default.
- W2000991672 title "Human Papillomavirus Type 16 E7 Oncoprotein Associates with the Cullin 2 Ubiquitin Ligase Complex, Which Contributes to Degradation of the Retinoblastoma Tumor Suppressor" @default.
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- W2000991672 doi "https://doi.org/10.1128/jvi.00881-07" @default.
- W2000991672 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2045412" @default.
- W2000991672 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17609271" @default.
- W2000991672 hasPublicationYear "2007" @default.
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