CapSeq and CIP-TAP identify Pol II start sites and reveal capped small RNAs as C. elegans piRNA precursors.
CapSeq and CIP-TAP identify Pol II start sites and reveal capped small RNAs as C. elegans piRNA precursors.
复制标题
DOI:
10.1016/j.cell.2012.11.023
复制
发表时间:
2012-12-21
期刊:
影响因子:
64.5
通讯作者:
Mello CC
中科院分区:
文献类型:
--
作者:
Gu W;Lee HC;Chaves D;Youngman EM;Pazour GJ;Conte D Jr;Mello CC
Piwi-interacting (pi) RNAs are germline-expressed small RNAs linked to epigenetic programming. C. elegans piRNAs are thought to be transcribed as independent gene-like loci. To test this idea and to identify potential Transcription Start (TS) sites for piRNA precursors, we developed CapSeq, an efficient enzymatic method for 5′-anchored RNA profiling. Using CapSeq we identify candidate TS sites, defined by 70–90 nt sequence tags, for over 50% of annotated Pol II loci. Surprisingly, however, these CapSeq tags failed to identify the overwhelming majority of piRNA loci. Instead, we show that the likely piRNA precursors are ~26 nt capped-small (cs) RNAs that initiate precisely 2 nt upstream of mature piRNAs, and that piRNA processing or stability requires a U at the csRNA +3 position. Finally, we identify a heretofore-unrecognized class of piRNAs processed from csRNAs that are expressed at promoters genome wide, nearly doubling the number of piRNAs available for genome surveillance.
登录
查看更多内容
影响因子:
64.5
作者:
Ashe A;Sapetschnig A;Weick EM;Mitchell J;Bagijn MP;Cording AC;Doebley AL;Goldstein LD;Lehrbach NJ;Le Pen J;Pintacuda G;Sakaguchi A;Sarkies P;Ahmed S;Miska EA
通讯作者:
Miska EA
影响因子:
64.5
作者:
Halic M;Moazed D
通讯作者:
Moazed D
影响因子:
9.8
作者:
Félix MA;Ashe A;Piffaretti J;Wu G;Nuez I;Bélicard T;Jiang Y;Zhao G;Franz CJ;Goldstein LD;Sanroman M;Miska EA;Wang D
通讯作者:
Wang D
影响因子:
7
作者:
Allen, Mary Ann;Hillier, LaDeana W.;Blumenthal, Thomas
通讯作者:
Blumenthal, Thomas
影响因子:
44.1
作者:
Beyret, Ergin;Liu, Na;Lin, Haifan
通讯作者:
Lin, Haifan