Excision of 5-hydroxymethylcytosine by DEMETER family DNA glycosylases.
Excision of 5-hydroxymethylcytosine by DEMETER family DNA glycosylases.
复制标题
DOI:
10.1016/j.bbrc.2014.03.060
复制
发表时间:
2014-04-18
影响因子:
3.1
通讯作者:
Huh, Jin Hoe
中科院分区:
文献类型:
--
作者:
Jang, Hosung;Shin, Hosub;Eichman, Brandt F.;Huh, Jin Hoe
In plants and animals, 5-methylcytosine (5mC) serves as an epigenetic mark to repress gene expression, playing critical roles for cellular differentiation and transposon silencing. Mammals also have 5-hydroxymethylcytosine (5hmC), resulting from hydroxylation of 5mC by TET family-enzymes. 5hmC is abundant in mouse Purkinje neurons and embryonic stem cells, and regarded as an important intermediate for active DNA demethylation in mammals. However, the presence of 5hmC in plants has not been clearly demonstrated. In Arabidopsis, the DEMETER (DME) family DNA glycosylases efficiently remove 5mC, which results in DNA demethylation and transcriptional activation of target genes. Here we show that DME and ROS1 have a significant 5hmC excision activity in vitro, although we detected no 5hmC in Arabidopsis, suggesting that it is very unlikely for plants to utilize 5hmC as a DNA demethylation intermediate. Our results indicate that both plants and animals have 5mC in common but DNA demethylation systems have independently evolved with distinct mechanisms.
登录
查看更多内容
影响因子:
46.9
作者:
通讯作者:
--
影响因子:
64.5
作者:
Bhutani N;Burns DM;Blau HM
通讯作者:
Blau HM
影响因子:
16
作者:
Xu Y;Wu F;Tan L;Kong L;Xiong L;Deng J;Barbera AJ;Zheng L;Zhang H;Huang S;Min J;Nicholson T;Chen T;Xu G;Shi Y;Zhang K;Shi YG
通讯作者:
Shi YG
影响因子:
14.9
作者:
Ponferrada-Marín MI;Roldán-Arjona T;Ariza RR
通讯作者:
Ariza RR
DOI:
10.1126/science.1191078
发表时间:
2010-10-29
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Bonasio R;Tu S;Reinberg D
通讯作者:
Reinberg D