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A Comparative Approach to Characterize the Landscape of Host-Pathogen Protein-Protein Interactions
Published on: July 18, 2013
USP11 stabilizes HPV-16E7 and further modulates the E7 biological activity
Ching-Hui Lin1, Hung-Shu Chang, Winston C Y Yu
1National Health Research Institutes, 35 Keyan Rd., Zhunan Town, Miaoli County 350, Taiwan.
The Journal of Biological Chemistry
|April 15, 2008
Summary
The ubiquitin-specific protease 11 (USP11) protein stabilizes the human papillomavirus 16 E7 (HPV-16E7) oncoprotein by reducing its ubiquitination and degradation. This interaction is crucial for E7
Area of Science:
- Molecular Biology
- Virology
- Biochemistry
Background:
- Human papillomavirus type 16 E7 (HPV-16E7) is a key oncoprotein in cervical cancer development.
- Protein stability is essential for the functional activity of oncoproteins like HPV-16E7.
Purpose of the Study:
- To investigate the interaction between USP11 and HPV-16E7.
- To determine the role of USP11 in regulating HPV-16E7 stability and function.
Main Methods:
- Yeast two-hybrid system to identify protein interactions.
- Analysis of HPV-16E7 ubiquitination and degradation levels.
- Assessment of USP11's catalytic activity on E7 stability.
Main Results:
- USP11 specifically interacts with and forms a complex with HPV-16E7.
- USP11 significantly increases HPV-16E7 levels by reducing its ubiquitination and degradation.
- A catalytically inactive USP11 mutant failed to protect E7 from degradation.
- USP11 influences E7's role in modulating cell growth.
Conclusions:
- USP11 deubiquitinates HPV-16E7, enhancing its stability.
- USP11 regulates HPV-16E7 protein levels, impacting its oncogenic functions.
- USP11 is a critical factor in HPV-16E7-mediated cell transformation.
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