DOI: 10.1101/gad.1536807. Functional cooperation between HP1 and DNMT1 mediates gene silencing

Functional cooperation between HP1 and DNMT1 mediates gene silencing

10.1101/gad.1536807

Crossref journal-article

Cold Spring Harbor Laboratory

Genes & Development (246)

Abstract

Mammalian euchromatic gene silencing results from the combined repressive effects of histone and DNA methyltransferases. Little is known of the mechanism by which these enzymes cooperate to induce silencing. Here we show that mammalian HP1 family members mediate communication between histone and DNA methyltransferases. In vitro, methylation of histone 3 Lys 9 by G9a creates a binding platform for HP1α, β, and γ. DNMT1 interacts with HP1 resulting in increased DNA methylation on DNA and chromatin templates in vitro. The functional and physical interaction can be recapitulated in vivo. Binding of GAL4-HP1 to a reporter construct is sufficient to induce repression and DNA methylation in DNMT1 wild-type but not DNMT1-null cells. Additionally, silencing of the Survivin gene coincides with recruitment of G9a and HP1 in DNMT1 wild-type but not null cells. We conclude that direct interactions between HP1 and DNMT1 mediate silencing of euchromatic genes.

Bibliography

Smallwood, A., EstÃ¨ve, P.-O., Pradhan, S., & Carey, M. (2007). Functional cooperation between HP1 and DNMT1 mediates gene silencing. Genes & Development, 21(10), 1169â1178.

Authors 4

Andrea Smallwood (first)
Pierre-Olivier Estève (additional)
Sriharsa Pradhan (additional)
Michael Carey (additional)

References 62 Referenced 283

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Dates

Type	When
Created	18 years, 3 months ago (April 30, 2007, 8:51 p.m.)
Deposited	3 years, 9 months ago (Nov. 16, 2021, 12:06 p.m.)
Indexed	1 day, 13 hours ago (Aug. 21, 2025, 1:27 p.m.)
Issued	18 years, 3 months ago (April 30, 2007)
Published	18 years, 3 months ago (April 30, 2007)
Published Online	18 years, 3 months ago (April 30, 2007)
Published Print	18 years, 3 months ago (May 15, 2007)

Funders 0

None

BibTeX

@article{Smallwood_2007, title={Functional cooperation between HP1 and DNMT1 mediates gene silencing}, volume={21}, ISSN={1549-5477}, url={http://dx.doi.org/10.1101/gad.1536807}, DOI={10.1101/gad.1536807}, number={10}, journal={Genes & Development}, publisher={Cold Spring Harbor Laboratory}, author={Smallwood, Andrea and Estève, Pierre-Olivier and Pradhan, Sriharsa and Carey, Michael}, year={2007}, month=apr, pages={1169–1178} }

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