Cited by 422Epigenetics and DNA MethylationGenomics and Chromatin DynamicsCancer-related gene regulation

CpG methylation inhibits proenkephalin gene expression and binding of the transcription factor AP-2

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Comb, Michael, Goodman, Howard M.·1990·Nucleic Acids Research

Abstract

DNA methylation at HpaII (CmCGG) sites inhibits expression of a human proenkephalin-CAT fusion gene when it is transiently expressed in CV-1 cells or stably expressed in C6-glioma cells. The inhibitory effects of HpaII methylation have been mapped to a site within the human proenkephalin promoter located at position -72 relative to the start site of transcription. This region spans a cAMP and phorbol ester inducible enhancer and methylation at this position inhibits both basal transcription and transcription induced by either cAMP or TPA. The HpaII site is located within an element which binds the transcription factor AP-2. In vitro methylation at this HpaII site inhibits the binding of AP-2. These results suggest that CpG methylation inhibits proenkephalin gene expression by directly interfering with the binding of a positively acting transcription factor previously shown to be essential for maximal basal, cAMP, and TPA inducible transcription.

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  • Manipulation of the methylation status of DNA sequences results in differential binding of transcription factors, including E2F, AP2α, MYC and MYN.

    “The manipulation of the methylation status of DNA sequences has been shown (mostly in in vitro studies) to result in the differential binding of TFs, including E2F, AP2α, MYC and MYN88–95.”

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  1. Razin,A., Szyf,T., Kafri,M., Roll,H., Giloh,S., Scarpa,D., Carotti,?. and Cantoni,G. (1986) Proc. Natl. Acad. Sci. USA 83, 2827-2831.
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Authors
Comb, M., & Goodman, H. M.
Affiliations
Harvard University (US)
Corresponding author
Comb, Michael
Venue
Nucleic Acids Research
Published
1990
Volume
18
Issue
13
Pages
3975-3982
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W1978172569
Cited by
422
References
40
Citations by year
2026: 2 · 2025: 3 · 2024: 9 · 2023: 7 · 2022: 9 · 2021: 7 · 2020: 8 · 2019: 9 · 2018: 12 · 2017: 7 · 2016: 11 · 2015: 18 · 2014: 22 · 2013: 16 · 2012: 32
FWCI
4.42
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01da005706-10)
  • National Institute on Drug Abuse (R01-DA05706-01)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer-related gene regulation
Keywords
CpG methylation, DNA methylation, proenkephalin, gene expression regulation, AP2 transcription factor, promoter, enhancers, phorbol ester, transcriptional repression, HpaII restriction sites, C6 glioma cells
MeSH terms
Base Sequence, Cloning, Molecular, Cytosine, DNA, DNA-Binding Proteins, Enkephalins, Gene Expression Regulation, Humans, Methylation, Molecular Sequence Data, Promoter Regions, Genetic, Protein Precursors, Transcription Factors, Transcription, Genetic, Tumor Cells, Cultured, Restriction Mapping, Dinucleoside Phosphates, Deoxyribonucleases, Type II Site-Specific, Deoxyribonuclease HpaII, 5-Methylcytosine, Transcription Factor AP-2

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