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MeCP2 Represses Enhancers through Chromosome Topology-Associated DNA Methylation.

Abstract：

:The genomes of mammalian neurons contain uniquely high levels of non-CG DNA methylation that can be bound by the Rett syndrome protein, MeCP2, to regulate gene expression. How patterns of non-CG methylation are established in neurons and the mechanism by which this methylation works with MeCP2 to control gene expression is unclear. Here, we find that genes repressed by MeCP2 are often located within megabase-scale regions of high non-CG methylation that correspond with topologically associating domains of chromatin folding. MeCP2 represses enhancers found in these domains that are enriched for non-CG and CG methylation, with the strongest repression occurring for enhancers located within MeCP2-repressed genes. These alterations in enhancer activity provide a mechanism for how MeCP2 disruption in disease can lead to widespread changes in gene expression. Hence, we find that DNA topology can shape non-CG DNA methylation across the genome to dictate MeCP2-mediated enhancer regulation in the brain.

journal_name

Mol Cell

journal_title

Molecular cell

authors

Clemens AW,Wu DY,Moore JR,Christian DL,Zhao G,Gabel HW

doi

10.1016/j.molcel.2019.10.033

subject

Has Abstract

pub_date

2020-01-16 00:00:00

pages

279-293.e8

issue

2

eissn

1097-2765

issn

1097-4164

pii

S1097-2765(19)30811-1

journal_volume

77

pub_type

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