Smaug, a novel and conserved protein, contributes to repression of nanos mRNA translation in vitro.

Smaug, a novel and conserved protein, contributes to repression of nanos mRNA translation in vitro.
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Smaug 是一种新型保守蛋白,有助于抑制 nanos mRNA 的体外翻译。

DOI:
10.1017/s1355838299991392
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发表时间:
1999
期刊:
RNA (New York, N.Y.)
影响因子:
--
通讯作者:
Macdonald,PM
Macdonald,PM
中科院分区:
--
文献类型:
--
作者:
Smibert,CA;Lie,YS;Shillinglaw,W;Henzel,WJ;Macdonald,PM

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Nanos蛋白在果蝇胚胎的后部正确部署,在那里它指导着后面的发育,需要RNA定位和翻译控制的组合。这些控制确保只有后定位的Nanos mRNA被翻译,而非定位的Nanos mRNA被翻译抑制。在这里,我们描述了编码Smaug的基因的克隆,Smaug是一种RNA结合蛋白,它与Nanos mRNA中介导翻译抑制的序列SRE相互作用。利用体外翻译实验,我们证明在早期胚胎的提取物中存在SRE依赖的抑制。免疫耗竭提取物中的Smaug消除了抑制,这与Smaug参与的概念一致。Smaug是一个新的基因,哺乳动物中潜在的Smaug同源物的存在增加了Smaug代表一类新的保守翻译抑制因子的可能性。
Proper deployment of Nanos protein at the posterior of the Drosophila embryo, where it directs posterior development, requires a combination of RNA localization and translational controls. These controls ensure that only the posteriorly-localized nanos mRNA is translated, whereas unlocalized nanos mRNA is translationally repressed. Here we describe cloning of the gene encoding Smaug, an RNA-binding protein that interacts with the sequences, SREs, in the nanos mRNA that mediate translational repression. Using an in vitro translation assay, we demonstrate that SRE-dependent repression occurs in extracts from early stage embryos. Immunodepletion of Smaug from the extracts eliminates repression, consistent with the notion that Smaug is involved. Smaug is a novel gene and the existence of potential mammalian Smaug homologs raises the possibility that Smaug represents a new class of conserved translational repressor.
DOI: 10.1016/s0021-9258(18)61070-1
发表时间: 1987-07
期刊: The Journal of biological chemistry
影响因子: --
作者:
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