Torsin mediates primary envelopment of large ribonucleoprotein granules at the nuclear envelope.
Torsin mediates primary envelopment of large ribonucleoprotein granules at the nuclear envelope.
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Torsin介导了核包膜上大型核糖核蛋白颗粒的一级包膜。
DOI:
10.1016/j.celrep.2013.03.015
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发表时间:
2013-04-25
期刊:
影响因子:
8.8
通讯作者:
Budnik V
中科院分区:
文献类型:
--
作者:
Jokhi V;Ashley J;Nunnari J;Noma A;Ito N;Wakabayashi-Ito N;Moore MJ;Budnik V
A previously unrecognized mechanism by which large ribonucleoprotein (megaRNP) granules exit the nucleus is by budding through the nuclear envelope (NE). This mechanism is akin to the nuclear egress of Herpes-type viruses and is essential for proper synapse development. However, the molecular machinery required to remodel the NE during this process is unknown. Here we identify Torsin, a AAA-ATPase that in humans is linked to dystonia, as a major mediator of primary megaRNP envelopment during NE-budding. In torsin mutants, megaRNPs accumulate within the perinuclear space and the mRNAs contained within fail to reach synaptic sites, preventing normal synaptic protein synthesis, and thus proper synaptic bouton development. These studies begin to establish the cellular machinery underlying the exit of megaRNPs via budding, offer an explanation to the “nuclear blebbing” phenotype found in dystonia models and provide an important link between Torsin and synaptic phenotypes observed in dystonia.
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