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Large histone H3 lysine 9 dimethylated chromatin blocks distinguish differentiated from embryonic stem cells

Open access
Wen, Bo, Wu, Hao, Shinkai, Yoichi, Irizarry, Rafael A, Feinberg, Andrew P·2009·Nature Genetics

Abstract

Higher eukaryotes must adapt a totipotent genome to specialized cell types with stable but limited functions. One potential mechanism for lineage restriction is changes in chromatin, and differentiation-related chromatin changes have been observed for individual genes. We have taken a genome-wide view of histone H3 lysine 9 dimethylation (H3K9Me2) and find that differentiated tissues show surprisingly large K9-modified regions (up to 4.9 Mb). These regions are highly conserved between human and mouse and are differentiation specific, covering only ∼4% of the genome in undifferentiated mouse embryonic stem (ES) cells, compared to 31% in differentiated ES cells, ∼46% in liver and ∼10% in brain. These modifications require histone methyltransferase G9a and are inversely related to expression of genes within the regions. We term these regions large organized chromatin K9 modifications (LOCKs). LOCKs are substantially lost in cancer cell lines, and they may provide a cell type–heritable mechanism for phenotypic plasticity in development and disease.

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Metadata

Authors
Wen, B., Wu, H., Shinkai, Y., Irizarry, R. A., & Feinberg, A. P.
Venue
Nature Genetics
Published
2009-01-18
Volume
41
Issue
2
Pages
246-250
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W2091884937
Cited by
614
References
5
FWCI
18.12
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Large histone H3 lysine 9 dimethylated chromatin blocks distinguish differentiated from embryonic stem cells. https://app.cochat.ai/papers/10.1038/ng.297
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Wen, B., Wu, H., Shinkai, Y., Irizarry, R. A., & Feinberg, A. P. (2009). Large histone H3 lysine 9 dimethylated chromatin blocks distinguish differentiated from embryonic stem cells. Nature Genetics. https://doi.org/10.1038/ng.297

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