GADD45A does not promote DNA demethylation

被引：118

作者：

Jin, Seung-Gi ^{[1
]}

Guo, Cai ^{[1
]}

Pfeifer, Gerd P. ^{[1
]}

机构：

[1] Beckman Res Inst City Hope, Div Biol, Duarte, CA USA

来源：

PLOS GENETICS | 2008年 / 4卷 / 03期

关键词：

D O I：

10.1371/journal.pgen.1000013

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

Although DNA methylation patterns in somatic cells are thought to be relatively stable, they undergo dramatic changes during embryonic development, gametogenesis, and during malignant transformation. The enzymology of DNA methyltransferases is well understood, but the mechanism that removes methylated cytosines from DNA (active DNA demethylation) has remained enigmatic. Recently, a role of the growth arrest and DNA damage inducible protein GADD45A in DNA demethylation has been reported [1]. We have investigated the function of GADD45A in DNA demethylation in more detail using gene reactivation and DNA methylation assays. Contrary to the previous report, we were unable to substantiate a functional role of GADD45A in DNA demethylation. The mechanism of active DNA demethylation in mammalian cells remains unknown.

引用

页数：9

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