QIP, a Protein That Converts Duplex siRNA Into Single Strands, Is Required for Meiotic Silencing by Unpaired DNA

QIP, a Protein That Converts Duplex siRNA Into Single Strands, Is Required for Meiotic Silencing by Unpaired DNA
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QIP 是一种将双链 siRNA 转化为单链的蛋白质,是未配对 DNA 减数分裂沉默所必需的

DOI:
10.1534/genetics.110.118273
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发表时间:
2010
期刊:
影响因子:
3.3
通讯作者:
P. Shiu
P. Shiu
中科院分区:
生物学2区
文献类型:
--
作者:
Hua Xiao;William G. Alexander;T. Hammond;Erin C. Boone;Tony D. Perdue;P. Pukkila;P. Shiu

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RNA干扰(RNAi)是通过产生小分子RNA来调控真核生物基因表达的一种技术。存在两个RNAi系统来控制粗糙脉孢菌中的重复自私元件。抑制作用针对营养生长期间的转基因,而不配对DNA(MSUD)的减数分裂沉默作用则使减数分裂期间的不配对基因沉默。这两种机制需要共同的RNAi蛋白,如RNA指导的RNA聚合酶,Dicers和Argonaute slicers。我们之前已经证明,虽然Quelling依赖于DCL-1和DCL-2的冗余dicer活性,但MSUD仅需要DCL-1。在这里,我们表明,QDE-2相互作用蛋白(QIP),一种外切核酸酶,是重要的生产单链siRNA在镇压,也需要MSUD。QIP对性发育至关重要,并显示与核周区域的其他MSUD蛋白共定位。
RNA interference (RNAi) depends on the production of small RNA to regulate gene expression in eukaryotes. Two RNAi systems exist to control repetitive selfish elements in Neurospora crassa. Quelling targets transgenes during vegetative growth, whereas meiotic silencing by unpaired DNA (MSUD) silences unpaired genes during meiosis. The two mechanisms require common RNAi proteins, such as RNA-directed RNA polymerases, Dicers, and Argonaute slicers. We have previously demonstrated that, while Quelling depends on the redundant dicer activity of DCL-1 and DCL-2, only DCL-1 is required for MSUD. Here, we show that QDE-2-interacting protein (QIP), an exonuclease that is important for the production of single-stranded siRNA during Quelling, is also required for MSUD. QIP is crucial for sexual development and is shown to colocalize with other MSUD proteins in the perinuclear region.
DOI: 10.1016/j.chembiol.2004.06.006
发表时间: 2004-08-01
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作者:
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减数分裂沉默需要一种类似阿尔古特的蛋白质。
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