LTR-Retrotransposon Control by tRNA-Derived Small RNAs.
LTR-Retrotransposon Control by tRNA-Derived Small RNAs.
复制标题
DOI:
10.1016/j.cell.2017.06.013
复制
发表时间:
2017-06-29
期刊:
影响因子:
64.5
通讯作者:
Martienssen R
中科院分区:
文献类型:
--
作者:
Schorn AJ;Gutbrod MJ;LeBlanc C;Martienssen R
Transposon reactivation is an inherent danger in cells that lose epigenetic silencing during developmental reprogramming. In the mouse, LTR-retrotransposons, or endogenous retroviruses (ERV), account for most novel insertions and are expressed in the absence of histone H3 Lysine 9 trimethylation in preimplantation stem cells. We found abundant, 18 nt tRNA-derived small RNA (tRF) in these cells, and ubiquitously expressed 22 nt tRFs, that include the 3′ terminal CCA of mature tRNAs, and target the tRNA primer binding site (PBS) essential for ERV reverse transcription. We show that the two most active ERV families, IAP and MusD/ETn, are major targets and are strongly inhibited by tRFs in retrotransposition assays. 22 nt tRFs post-transcriptionally silence coding-competent ERVs, while 18 nt tRFs specifically interfere with reverse transcription and retrotransposon mobility. The PBS offers a unique target to specifically inhibit LTR-retrotransposons and tRF-targeting is a potentially highly conserved mechanism of small RNA-mediated transposon control. 3′ tRNA fragments limit the mobility of transposable elements in mouse ES cells
登录
查看更多内容
影响因子:
5.8
作者:
Barnett, Derek W.;Garrison, Erik K.;Marth, Gabor T.
通讯作者:
Marth, Gabor T.
影响因子:
3.7
作者:
Hemberger, Myriam
通讯作者:
Hemberger, Myriam
影响因子:
30.8
作者:
Kunarso, Galih;Chia, Na-Yu;Bourque, Guillaume
通讯作者:
Bourque, Guillaume
影响因子:
16.8
作者:
Fadloun, Anas;Le Gras, Stephanie;Torres-Padilla, Maria-Elena
通讯作者:
Torres-Padilla, Maria-Elena
DOI:
10.3390/life5041638
发表时间:
2015-11-27
期刊:
Life (Basel, Switzerland)
影响因子:
--
作者:
Keam SP;Hutvagner G
通讯作者:
Hutvagner G