Association of the human papillomavirus type 16 E7 oncoprotein with the 600-kDa retinoblastoma protein-associated factor, p600.

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Huh KW, DeMasi J, Ogawa H, Nakatani Y, Howley PM, Munger K

Association of the human papillomavirus type 16 E7 oncoprotein with the 600-kDa retinoblastoma protein-associated factor, p600.

Proc Natl Acad Sci U S A. 2005 Aug 9;102(32):11492-7. Epub 2005 Aug 1.

PubMed ID

16061792 [ View in PubMed

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Abstract

The human papillomavirus type 16 (HPV-16) E7 gene encodes a multifunctional oncoprotein that can subvert multiple cellular regulatory pathways. The best-known cellular targets of the HPV-16 E7 oncoprotein are the retinoblastoma tumor suppressor protein pRB and the related pocket proteins p107 and p130. However, there is ample evidence that E7 has additional cellular targets that contribute to its transforming potential. We isolated HPV-16 E7 associated cellular protein complexes by tandem affinity purification and mass spectrometry and identified the 600-kDa retinoblastoma protein associated factor, p600, as a cellular target of E7. Association of E7 with p600 is independent of the pocket proteins and is mediated through the N terminal E7 domain, which is related to conserved region 1 of the adenovirus E1A protein and importantly contributes to cellular transformation independent of pRB binding. Depletion of p600 protein levels by RNA interference substantially decreased anchorage-independent growth in HPV-positive and -negative human cancer cells. Therefore, p600 is a cellular target of E7 that regulates cellular pathways that contribute to anchorage-independent growth and cellular transformation.

DrugBank Data that Cites this Article

Drug Targets

Drug	Target	Kind	Organism	Pharmacological Action	Actions
Verpasep caltespen	E3 ubiquitin-protein ligase UBR4	Protein	Humans	Unknown	Not Available	Details

Polypeptides

Name	UniProt ID
E3 ubiquitin-protein ligase UBR4	Q5T4S7	Details