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Role of Histone H3 Lysine 27 Methylation in X Inactivation

Plath, Kathrin, Fang, Jia, Mlynarczyk-Evans, Susanna K., Cao, Ru, Worringer, Kathleen A., Wang, Hengbin, de la Cruz, Cecile C., Otte, Arie P., Panning, Barbara, Zhang, Yi·2003·Science

Abstract

The Polycomb group (PcG) protein Eed is implicated in regulation of imprinted X-chromosome inactivation in extraembryonic cells but not of random X inactivation in embryonic cells. The Drosophila homolog of the Eed-Ezh2 PcG protein complex achieves gene silencing through methylation of histone H3 on lysine 27 (H3-K27), which suggests a role for H3-K27 methylation in imprinted X inactivation. Here we demonstrate that transient recruitment of the Eed-Ezh2 complex to the inactive X chromosome (Xi) occurs during initiation of X inactivation in both extraembryonic and embryonic cells and is accompanied by H3-K27 methylation. Recruitment of the complex and methylation on the Xi depend on Xist RNA but are independent of its silencing function. Together, our results suggest a role for Eed-Ezh2–mediated H3-K27 methylation during initiation of both imprinted and random X inactivation and demonstrate that H3-K27 methylation is not sufficient for silencing of the Xi.

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Metadata

Authors
Plath, K., Fang, J., Mlynarczyk-Evans, S. K., Cao, R., Worringer, K. A., Wang, H., de la Cruz, C. C., Otte, A. P., Panning, B., & Zhang, Y.
Venue
Science
Published
2003-04-04
Volume
300
Issue
5616
Pages
131-135
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2103419911
Cited by
1,195
References
3
FWCI
23.16
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Role of Histone H3 Lysine 27 Methylation in X Inactivation. https://app.cochat.ai/papers/10.1126/science.1084274
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Plath, K., Fang, J., Mlynarczyk-Evans, S. K., Cao, R., Worringer, K. A., Wang, H., de la Cruz, C. C., Otte, A. P., Panning, B., & Zhang, Y. (2003). Role of Histone H3 Lysine 27 Methylation in X Inactivation. Science. https://doi.org/10.1126/science.1084274

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