Publikation: The HPV-16 E6 and E6-AP complex functions as a ubiquitin-protein ligase in the ubiquitination of p53
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The ubiquitin-dependent proteolytic pathway plays a major role in selective protein degradation. Ubiquitination of proteins requires the sequential action of the ubiquitin-activating enzyme (E1), ubiquitin-conjugating enzymes (E2), and in some cases ubiquitin-protein ligases (E3s). The oncogenic human papillomavirus (HPV) types 16 and 18 utilize this cellular proteolytic system to target the tumor suppressor protein p53. The HPV E6 oncoprotein binds to a cellular protein of 100 kd, termed E6-associated protein (E6-AP). The E6-E6-AP complex specifically interacts with p53, resulting in the rapid ubiquitin-dependent degradation of p53. Here we report the purification and identification of the factors necessary for the E6-E6-AP-mediated ubiquitination of p53. The ubiquitination of p53 requires the E1 enzyme and a novel E2 in mammalian cells, while E3 activity is conferred by the E6-E6-AP complex. Furthermore, E6-AP appears to have ubiquitin-protein ligase activity in the absence of E6.
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SCHEFFNER, Martin, Jon M. HUIBREGTSE, Richard D. VIERSTRA, Peter M. HOWLEY, 1993. The HPV-16 E6 and E6-AP complex functions as a ubiquitin-protein ligase in the ubiquitination of p53. In: Cell. 1993, 75(3), pp. 495-505. ISSN 0092-8674. eISSN 1097-4172. Available under: doi: 10.1016/0092-8674(93)90384-3BibTex
@article{Scheffner1993HPV16-42704, year={1993}, doi={10.1016/0092-8674(93)90384-3}, title={The HPV-16 E6 and E6-AP complex functions as a ubiquitin-protein ligase in the ubiquitination of p53}, number={3}, volume={75}, issn={0092-8674}, journal={Cell}, pages={495--505}, author={Scheffner, Martin and Huibregtse, Jon M. and Vierstra, Richard D. and Howley, Peter M.} }
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