Cited by 133Cervical Cancer and HPV ResearchGenomics and Chromatin DynamicsCancer-related Molecular Pathways

Cutaneous papillomavirus E6 oncoproteins associate with MAML1 to repress transactivation and NOTCH signaling

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Brimer, N, Lyons, C, Wallberg, A E, Vande Pol, S B·2012·Oncogene

Abstract

Papillomavirus E6 oncoproteins associate with LXXLL motifs on target cellular proteins to alter their function. Using a proteomic approach, we found the E6 oncoproteins of cutaneous papillomaviruses Bovine Papillomavirus Type 1 (BPV-1) E6 and human papillomavirus (HPV) types 1 and 8 (1E6 and 8E6) associated with the MAML1 transcriptional co-activator. All three E6 proteins bind to an acidic LXXLL motif at the carboxy-terminus of MAML1 and repress transactivation by MAML1. MAML1 is best known as the co-activator and effector of NOTCH-induced transcription, and BPV-1 E6 represses synthetic NOTCH-responsive promoters, endogenous NOTCH-responsive promoters, and is found in a complex with MAML1 in stably transformed cells. BPV-1-induced papillomas show characteristics of repressed NOTCH signal transduction, including suprabasal expression of integrins, talin and basal type keratins, and delayed expression of the NOTCH-dependent HES1 transcription factor. These observations give rise to a model whereby papillomavirus oncoproteins, including BPV-1 E6, and the cancer-associated HPV-8 E6 repress NOTCH-induced transcription, thereby delaying keratinocyte differentiation.

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Authors
Brimer, N., Lyons, C., Wallberg, A. E., & Vande Pol, S. B.
Affiliations
  • University of Virginia (US)
  • Karolinska Institutet (SE)
Venue
Oncogene
Published
2012-01-16
Volume
31
Issue
43
Pages
4639-4646
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W1985884010
Cited by
133
References
77
Citations by year
2026: 1 · 2025: 2 · 2024: 7 · 2023: 13 · 2022: 10 · 2021: 7 · 2020: 9 · 2019: 8 · 2018: 12 · 2017: 11 · 2016: 10 · 2015: 13 · 2014: 9 · 2013: 14 · 2012: 7
FWCI
10.26
Type
journal article
Language
en
Open access
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (CA120352, CA08093, R01CA120352, R01CA134737)
Topics
  • Health Sciences › Medicine › Epidemiology › Cervical Cancer and HPV Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
MAML1, Notch signaling, LXXLL motif, transcriptional repression, bovine papillomavirus type 1, human papillomavirus type 1, Hes1, keratinocyte differentiation, integrins, talin, papilloma formation
MeSH terms
DNA-Binding Proteins, Humans, Promoter Regions, Genetic, Skin, Transcription Factors, Viral Proteins, Signal Transduction, Transcriptional Activation, Papillomaviridae, Receptors, Notch

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