ASH1 mRNP-core factors form stable complexes in absence of cargo RNA at physiological conditions

ASH1 mRNP-core factors form stable complexes in absence of cargo RNA at physiological conditions
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ASH1 mRNP 核心因子在生理条件下在缺乏货物 RNA 的情况下形成稳定的复合物

DOI:
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发表时间:
2015
期刊:
影响因子:
4.1
通讯作者:
D. Niessing
D. Niessing
中科院分区:
生物学3区
文献类型:
--
作者:
F. Edelmann;A. Niedner;D. Niessing

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发芽酵母有丝分裂过程中ASH1mRNA的不对称运输构成了信使核糖核酸定位研究最深入的例子之一。最近,有两项研究通过体外运动试验证明ASH1m RNA转运复合体可以完全由重组因子重组而成。然而,这两项研究在货物RNA本身是否需要颗粒组装从而激活定向运输的问题上得出了不同的结论。在这里,我们提供了直接证据,证明在生理条件下,甚至在高于细胞水平的离子强度下,稳定的复合体在没有RNA的情况下确实可以组装。这些结果直接证实了之前的观点,即ASH1的运输机制不是由货物RNA本身激活的,而是通过蛋白质-蛋白质相互作用激活的。
Asymmetric ASH1 mRNA transport during mitosis of budding yeast constitutes one of the best-studied examples of mRNA localization. Recently, 2 studies used in vitro motility assays to prove that motile ASH1 mRNA-transport complexes can be reconstituted entirely from recombinant factors. Both studies, however, differed in their conclusions on whether cargo RNA itself is required for particle assembly and thus activation of directional transport. Here we provide direct evidence that stable complexes do assemble in absence of RNA at physiologic conditions and even at ionic strengths above cellular levels. These results directly confirm the previous notion that the ASH1 transport machinery is not activated by the cargo RNA itself, but rather through protein-protein interactions.
DOI: 10.4161/rna.29946
发表时间: 2014
期刊: RNA biology
影响因子: 4.1
作者:
Niedner A;Edelmann FT;Niessing D
通讯作者: Niessing D
DOI: 10.1073/pnas.1315289111
发表时间: 2013-12-24
影响因子: 11.1
作者:
Niedner, Annika;Mueller, Marisa;Niessing, Dierk
通讯作者: Niessing, Dierk
DOI: 10.1016/s1097-2765(00)80143-4
发表时间: 1998-10-01
期刊: MOLECULAR CELL
影响因子: 16
作者:
Bertrand, E;Chartrand, P;Long, RM
通讯作者: Long, RM
DOI: 10.1083/jcb.201302095
发表时间: 2013-12-23
期刊: The Journal of cell biology
影响因子: --
作者:
Heym RG;Zimmermann D;Edelmann FT;Israel L;Ökten Z;Kovar DR;Niessing D
通讯作者: Niessing D