How HPV 5 and 8 E6 Proteins Affect p300 and Cell Signaling
Author Information
Author(s): Howie Heather L., Koop Jennifer I., Weese Joleen, Robinson Kristin, Wipf Greg, Kim Leslie, Galloway Denise A.
Primary Institution: Fred Hutchinson Cancer Research Center
Hypothesis
The E6 proteins from beta-HPVs interact with p300 and affect its stability and function.
Conclusion
The E6 proteins from beta-HPVs 5 and 8 lead to the degradation of p300, which in turn affects the expression of key differentiation markers in keratinocytes.
Supporting Evidence
- HPV E6 proteins from types 5 and 8 strongly interact with p300.
- This interaction leads to p300 degradation in a proteasomal-dependent manner.
- Lower levels of p300 affect the expression of differentiation markers K1, K10, and involucrin.
- E6 proteins compete with AKT for binding to p300, preventing its stabilization.
- Knockdown of E6 expression reverses the degradation of p300.
Takeaway
The proteins from certain types of HPV can make a helper protein in our cells break down, which can stop skin cells from working properly.
Methodology
The study used GST-pulldown assays and immunoblotting to analyze protein interactions and degradation.
Limitations
The study primarily focuses on in vitro experiments, which may not fully replicate in vivo conditions.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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