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Suv39h-dependent H3K9me3 marks intact retrotransposons and silences LINE elements in mouse embryonic stem cells.

Abstract：

:Heterochromatin is required to restrict aberrant expression of retrotransposons, but it remains poorly defined due to the underlying repeat-rich sequences. We dissected Suv39h-dependent histone H3 lysine 9 trimethylation (H3K9me3) by genome-wide ChIP sequencing in mouse embryonic stem cells (ESCs). Refined bioinformatic analyses of repeat subfamilies indicated selective accumulation of Suv39h-dependent H3K9me3 at interspersed repetitive elements that cover ∼5% of the ESC epigenome. The majority of the ∼8,150 intact long interspersed nuclear elements (LINEs) and endogenous retroviruses (ERVs), but only a minor fraction of the >1.8 million degenerate and truncated LINEs/ERVs, are enriched for Suv39h-dependent H3K9me3. Transcriptional repression of intact LINEs and ERVs is differentially regulated by Suv39h and other chromatin modifiers in ESCs but governed by DNA methylation in committed cells. These data provide a function for Suv39h-dependent H3K9me3 chromatin to specifically repress intact LINE elements in the ESC epigenome.

journal_name

Mol Cell

journal_title

Molecular cell

authors

Bulut-Karslioglu A,De La Rosa-Velázquez IA,Ramirez F,Barenboim M,Onishi-Seebacher M,Arand J,Galán C,Winter GE,Engist B,Gerle B,O'Sullivan RJ,Martens JH,Walter J,Manke T,Lachner M,Jenuwein T

doi

10.1016/j.molcel.2014.05.029

subject

Has Abstract

pub_date

2014-07-17 00:00:00

pages

277-90

issue

2

eissn

1097-2765

issn

1097-4164

pii

S1097-2765(14)00453-5

journal_volume

55

pub_type

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