The Drosophila HP1 homolog Rhino is required for transposon silencing and piRNA production by dual-strand clusters.
The Drosophila HP1 homolog Rhino is required for transposon silencing and piRNA production by dual-strand clusters.
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果蝇HP1同源性犀牛是通过双链簇产生的转座子沉默和PIRNA所必需的。
DOI:
10.1016/j.cell.2009.07.014
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发表时间:
2009-09-18
期刊:
影响因子:
64.5
通讯作者:
Theurkauf WE
中科院分区:
文献类型:
--
作者:
Klattenhoff C;Xi H;Li C;Lee S;Xu J;Khurana JS;Zhang F;Schultz N;Koppetsch BS;Nowosielska A;Seitz H;Zamore PD;Weng Z;Theurkauf WE
piRNAs silence transposons and maintain genome integrity during germ-line development. In Drosophila, transposon-rich heterochromatic clusters encode piRNAs either on both genomic strands (dual-strand clusters) or predominantly one genomic strand (uni-strand clusters). Primary piRNAs derived from these clusters are proposed to drive a ping-pong amplification cycle catalyzed by proteins that localize to the perinuclear nuage. We show that the HP1 homologue Rhino is required for nuage organization, transposon silencing, and ping-pong amplification of piRNAs. rhi mutations virtually eliminate piRNAs from the dual-strand clusters and block production of putative precursor RNAs from both strands of the major 42AB dual-strand cluster, but do not block production of transcripts or piRNAs from the uni-strand clusters. Furthermore, Rhino protein associates with the 42AB dual-strand cluster, but does not bind to uni-strand cluster 2 or flamenco. Rhino thus appears to promote transcription of dual-strand clusters, leading to production of piRNAs that drive the ping-pong amplification cycle.
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DOI:
10.1073/pnas.0805943105
发表时间:
2008-09-30
影响因子:
11.1
作者:
Chambeyron, Severine;Popkova, Anna;Bucheton, Alain
通讯作者:
Bucheton, Alain
影响因子:
64.5
作者:
Cha, BJ;Koppetsch, BS;Theurkauf, WE
通讯作者:
Theurkauf, WE
影响因子:
9.2
作者:
Chen, Yu;Pane, Attilio;Schupbach, Trudi
通讯作者:
Schupbach, Trudi
影响因子:
1.6
作者:
BELMONT, AS;BRAUNFELD, MB;AGARD, DA
通讯作者:
AGARD, DA
影响因子:
11.8
作者:
Klattenhoff, Carla;Bratu, Diana P.;Theurkauf, William E.
通讯作者:
Theurkauf, William E.