Cited by 4,673Epigenetics and DNA MethylationGenomics and Chromatin DynamicsGenetic Syndromes and Imprinting

Human DNA methylomes at base resolution show widespread epigenomic differences

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Lister, Ryan, Pelizzola, Mattia, Dowen, Robert H., Hawkins, R. David, Hon, Gary, Tonti-Filippini, Julian, Nery, Joseph R., Lee, Leonard +10 more·2009·Nature

Abstract

DNA cytosine methylation is a central epigenetic modification that has essential roles in cellular processes including genome regulation, development and disease. Here we present the first genome-wide, single-base-resolution maps of methylated cytosines in a mammalian genome, from both human embryonic stem cells and fetal fibroblasts, along with comparative analysis of messenger RNA and small RNA components of the transcriptome, several histone modifications, and sites of DNA-protein interaction for several key regulatory factors. Widespread differences were identified in the composition and patterning of cytosine methylation between the two genomes. Nearly one-quarter of all methylation identified in embryonic stem cells was in a non-CG context, suggesting that embryonic stem cells may use different methylation mechanisms to affect gene regulation. Methylation in non-CG contexts showed enrichment in gene bodies and depletion in protein binding sites and enhancers. Non-CG methylation disappeared upon induced differentiation of the embryonic stem cells, and was restored in induced pluripotent stem cells. We identified hundreds of differentially methylated regions proximal to genes involved in pluripotency and differentiation, and widespread reduced methylation levels in fibroblasts associated with lower transcriptional activity. These reference epigenomes provide a foundation for future studies exploring this key epigenetic modification in human disease and development.

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  • In most somatic tissues, more than 80% of CpGs are methylated, except for CpG islands and other regulatory sequences that have reduced 5mC.

    “In most somatic tissues, the majority (>80%) of CpGs in the genome are methylated, with the exception of CGIs, and other gene regulatory sequences that show reduced 5mC levels (3).”
  • In PMD-associated tissues such as cultured fibroblasts, genes located in PMDs are both lowly expressed and methylated.

    “In PMD associated tissues such cultured fibroblasts, genes located in PMDs are both lowly expressed and methylated (3).”
  • Human embryonic stem cells and mammalian brain tissues contain abundant non-CG methylation (5mCH), although the underlying three-base sequence context differs.

    “Human embryonic stem cells (hESC) and mammalian brain tissues contain abundant non-CG methylation (5mCH, where H equals A, C or T) although the underlying three-base DNA sequence context (5mCAG vs. 5mCAC, respectively) is distinct (3, 13).”

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Authors
Lister, R., Pelizzola, M., Dowen, R. H., Hawkins, R. D., Hon, G., Tonti-Filippini, J., Nery, J. R., Lee, L., Ye, Z., Ngo, Q.-M., Edsall, L., Antosiewicz-Bourget, J., Stewart, R., Ruotti, V., Millar, A. H., Thomson, J. A., Ren, B., & Ecker, J. R.
Affiliations
  • Salk Institute for Biological Studies (US)
  • Ludwig Cancer Research (BE)
  • Morgridge Institute for Research (US)
  • The University of Western Australia (AU)
  • University of Wisconsin–Madison (US)
Corresponding author
Ecker, Joseph R.
Venue
Nature
Published
2009-10-14
Volume
462
Issue
7271
Pages
315-322
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2059099579
Cited by
4,673
References
50
Citations by year
2026: 132 · 2025: 178 · 2024: 214 · 2023: 207 · 2022: 237 · 2021: 251 · 2020: 232 · 2019: 256 · 2018: 273 · 2017: 282 · 2016: 304 · 2015: 356 · 2014: 350 · 2013: 374 · 2012: 373
FWCI
136.77
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion, other-oa)
  • RePEc: Research Papers in Economics (submittedVersion)
  • BOA (University of Milano-Bicocca) (submittedVersion)
Funders
  • California Institute for Regenerative Medicine
  • National Institutes of Health
  • Australian Research Council (DP0771156, CE0561495)
  • National Human Genome Research Institute (R01HG003523)
  • National Institute of Environmental Health Sciences (U01ES017166, U01 1U01ES017166-01)
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 › Genetics › Genetic Syndromes and Imprinting
Keywords
DNA methylation, methylome, cytosine methylation, non-CG methylation, human embryonic stem cells, fetal fibroblasts, differentially methylated regions, pluripotency, cell differentiation, induced pluripotent stem cells, histone modifications, protein-DNA interactions, gene expression regulation, epigenome, gene body methylation, enhancer methylation
MeSH terms
Cell Line, DNA, DNA-Binding Proteins, Humans, Cluster Analysis, Genome, DNA Methylation, Epigenesis, Genetic, Embryonic Stem Cells

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