Active DNA demethylation in plant companion cells reinforces transposon methylation in gametes.
Active DNA demethylation in plant companion cells reinforces transposon methylation in gametes.
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DOI:
10.1126/science.1224839
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发表时间:
2012-09-14
期刊:
影响因子:
--
通讯作者:
Zilberman D
中科院分区:
文献类型:
--
作者:
Ibarra CA;Feng X;Schoft VK;Hsieh TF;Uzawa R;Rodrigues JA;Zemach A;Chumak N;Machlicova A;Nishimura T;Rojas D;Fischer RL;Tamaru H;Zilberman D
The Arabidopsis thaliana central cell, the companion cell of the egg, undergoes DNA demethylation before fertilization, but the targeting preferences, mechanism, and biological significance of this process remain unclear. Here, we show that active DNA demethylation mediated by the DEMETER DNA glycosylase accounts for all of the demethylation in the central cell and preferentially targets small, AT-rich, and nucleosome-depleted euchromatic transposable elements. The vegetative cell, the companion cell of sperm, also undergoes DEMETER-dependent demethylation of similar sequences, and lack of DEMETER in vegetative cells causes reduced small RNA–directed DNA methylation of transposons in sperm. Our results demonstrate that demethylation in companion cells reinforces transposon methylation in plant gametes and likely contributes to stable silencing of transposable elements across generations.
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影响因子:
11.4
作者:
Roudier, Francois;Ahmed, Ikhlak;Berard, Caroline;Sarazin, Alexis;Mary-Huard, Tristan;Cortijo, Sandra;Bouyer, Daniel;Caillieux, Erwann;Duvernois-Berthet, Evelyne;Al-Shikhley, Liza;Giraut, Laurene;Despres, Barbara;Drevensek, Stephanie;Barneche, Fredy;Derozier, Sandra;Brunaud, Veronique;Aubourg, Sebastien;Schnittger, Arp;Bowler, Chris;Martin-Magniette, Marie-Laure;Robin, Stephane;Caboche, Michel;Colot, Vincent
通讯作者:
Colot, Vincent
影响因子:
9.5
作者:
Bauer MJ;Fischer RL
通讯作者:
Fischer RL
DOI:
10.1073/pnas.1019273108
发表时间:
2011-02-01
影响因子:
11.1
作者:
Hsieh, Tzung-Fu;Shin, Juhyun;Fischer, Robert L.
通讯作者:
Fischer, Robert L.
影响因子:
7.7
作者:
Schoft, Vera K.;Chumak, Nina;Tamaru, Hisashi
通讯作者:
Tamaru, Hisashi
DOI:
10.1038/nrg2719
发表时间:
2010-03
期刊:
Nature reviews. Genetics
影响因子:
--
作者:
通讯作者:
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