Cited by 1,021Epigenetics and DNA MethylationPluripotent Stem Cells ResearchGenomics and Chromatin Dynamics

EZH1 mediates methylation on histone H3 lysine 27 and complements EZH2 in maintaining stem cell identity and executing pluripotency

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Shen, Xiaohua, Liu, Yingchun, Hsu, Yu-Jung, Fujiwara, Yuko, Kim, Jonghwan, Mao, Xiaohong, Yuan, Guo-Cheng, Orkin, Stuart H.·2008·Molecular Cell

Abstract

Trimethylation on H3K27 (H3K27me3) mediated by Polycomb repressive complex 2 (PRC2) has been linked to embryonic stem cell (ESC) identity and pluripotency. EZH2, the catalytic subunit of PRC2, has been reported as the sole histone methyltransferase that methylates H3K27 and mediates transcriptional silencing. Analysis of Ezh2(-/-) ESCs suggests existence of an additional enzyme(s) catalyzing H3K27 methylation. We have identified EZH1, a homolog of EZH2 that is physically present in a noncanonical PRC2 complex, as an H3K27 methyltransferase in vivo and in vitro. EZH1 colocalizes with the H3K27me3 mark on chromatin and preferentially preserves this mark on development-related genes in Ezh2(-/-) ESCs. Depletion of Ezh1 in cells lacking Ezh2 abolishes residual methylation on H3K27 and derepresses H3K27me3 target genes, demonstrating a role of EZH1 in safeguarding ESC identity. Ezh1 partially complements Ezh2 in executing pluripotency during ESC differentiation, suggesting that cell-fate transitions require epigenetic specificity.

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  1. Johnson WE, Li W, Meyer CA, Gottardo R, Carroll JS, Brown M, Liu XS. Model-based analysis of tilingarrays for ChIP-chip. Proceedings of the National Academy of Sciences of the United States of America 2006;103:12457-12462. [PubMed: 16895995]

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Authors
Shen, X., Liu, Y., Hsu, Y.-J., Fujiwara, Y., Kim, J., Mao, X., Yuan, G.-C., & Orkin, S. H.
Affiliations
  • Harvard University (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Orkin, Stuart H.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2008-11
Volume
32
Issue
4
Pages
491-502
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2116318886
Cited by
1,021
References
47
Citations by year
2026: 26 · 2025: 56 · 2024: 44 · 2023: 41 · 2022: 54 · 2021: 81 · 2020: 51 · 2019: 70 · 2018: 59 · 2017: 72 · 2016: 52 · 2015: 68 · 2014: 72 · 2013: 68 · 2012: 62
FWCI
19.58
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • Dana-Farber Cancer Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
EZH1, EZH2, H3K27me3, polycomb repressive complex 2, pluripotency, histone methyltransferase, epigenetic regulation, cell fate transitions, transcriptional silencing
MeSH terms
Enhancer of Zeste Homolog 2 Protein, Animals, Cell Differentiation, Cell Line, DNA-Binding Proteins, Genes, Regulator, Histones, Lysine, Methylation, Models, Biological, Histone-Lysine N-Methyltransferase, Stem Cells, Transcription Factors, Mice, Polycomb Repressive Complex 2

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