Cited by 132Cervical Cancer and HPV ResearchDevelopmental Biology and Gene RegulationGenomics and Chromatin Dynamics

Cutaneous β-human papillomavirus E6 proteins bind Mastermind-like coactivators and repress Notch signaling

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Tan, Min Jie Alvin, White, Elizabeth A., Sowa, Mathew E., Harper, J. Wade, Aster, Jon C., Howley, Peter M.·2012·Proceedings of the National Academy of Sciences

Abstract

The Notch signaling pathway is a key determinant in keratinocyte differentiation and growth cycle arrest, and has been reported to have a tumor suppressor function in skin. The papillomavirus life cycle is intricately linked to the differentiation status of keratinocytes. Papillomaviruses are associated with benign proliferative epithelial lesions in their respective hosts. Although human papillomaviruses (HPVs) associated with genital tract lesions have been extensively studied, studies of the cutaneous HPVs are more limited. In particular, it is well established that the E6 proteins of high-risk HPVs of the α-genus such as HPV16 and HPV18 mediate the degradation of p53 by its association with the ubiquitin ligase E6AP. In contrast, less is known about the cellular activities of the cutaneous HPVs of the β-genus. By using an unbiased proteomic approach, we identify MAML1 and other members of the Notch transcription complex as high-confidence cellular interacting proteins of E6 proteins of the β-genus HPVs and of the bovine papillomavirus type 1 associated with cutaneous fibropapillomas. We show that bovine papillomavirus type 1 and β-HPV E6 repress Notch transcriptional activation, and that this repression is dependent on an interaction with MAML1. Finally, we show that the expression levels of endogenous Notch target genes are repressed by β-HPV E6 proteins. These findings elucidate a mechanism of viral antagonism of Notch signaling, and suggest that Notch signaling is an important epithelial cell pathway target for the β-HPVs.

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  1. Howley PM, Lowy DR (2007) Papillomaviruses. Fields Virology, eds Knipe D, Howley P (Lippincott Williams and Wilkins, Philadelphia), 5th Ed, pp 2299-2354.

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Authors
Tan, M. J. A., White, E. A., Sowa, M. E., Harper, J. W., Aster, J. C., & Howley, P. M.
Affiliations
  • Harvard University (US)
  • Departments of Microbiology and Immunobiology and
  • Brigham and Women's Hospital (US)
Corresponding author
Howley, Peter M.
Venue
Proceedings of the National Academy of Sciences
Published
2012-04-30
Volume
109
Issue
23
Pages
E1473-80
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2020553511
Cited by
132
References
51
Citations by year
2026: 2 · 2025: 4 · 2024: 7 · 2023: 9 · 2022: 6 · 2021: 8 · 2020: 13 · 2019: 10 · 2018: 7 · 2017: 17 · 2016: 9 · 2015: 10 · 2014: 13 · 2013: 11 · 2012: 6
FWCI
9.54
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Brigham and Women's Hospital
  • National Institutes of Health
  • National Cancer Institute (P01 CA 50661, RC1CA145188, P01CA050661)
  • National Institute of General Medical Sciences (R01GM054137)
  • National Institute of Allergy and Infectious Diseases (F32AI080075)
Topics
  • Health Sciences › Medicine › Epidemiology › Cervical Cancer and HPV Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
E6 oncoprotein, Notch signaling, MAML1, bovine papillomavirus type 1, keratinocyte differentiation, Notch target genes
MeSH terms
Animals, Cell Line, DNA-Binding Proteins, Humans, Luciferases, Oncogene Proteins, Viral, Plasmids, Transcription Factors, Transfection, Blotting, Western, Signal Transduction, Proteomics, Mice, Receptors, Notch, Betapapillomavirus, Real-Time Polymerase Chain Reaction

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