A transcriptome-wide RNAi screen in the Drosophila ovary reveals factors of the germline piRNA pathway.
A transcriptome-wide RNAi screen in the Drosophila ovary reveals factors of the germline piRNA pathway.
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DOI:
10.1016/j.molcel.2013.04.007
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发表时间:
2013-06-06
期刊:
影响因子:
16
通讯作者:
Hannon, Gregory J.
中科院分区:
文献类型:
--
作者:
Czech, Benjamin;Preall, Jonathan B.;McGinn, Jon;Hannon, Gregory J.
The Drosophila piRNA pathway provides an RNA-based immune system that defends the germline genome against selfish genetic elements. Two inter-related branches of the piRNA system exist: somatic cells that support oogenesis only employ Piwi, whereas germ cells utilize a more elaborated pathway centered on the three gonad-specific Argonaute proteins Piwi, Aubergine, and Argonaute3. While several key factors of each branch have been identified, our current knowledge is insufficient to explain the complex workings of the piRNA machinery. Here, we report a reverse genetic screen spanning the ovarian transcriptome in an attempt to uncover the full repertoire of genes required for piRNA-mediated transposon silencing in the female germline. Our screen reveals new key factors of piRNA-mediated transposon silencing, including the novel piRNA biogenesis factors, CG2183 (GASZ) and Deadlock. Last, our data uncovers a previously unanticipated set of factors preferentially required for repression of different transposons types.
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通讯作者:
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通讯作者:
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