TREX exposes the RNA-binding domain of Nxf1 to enable mRNA export.

TREX exposes the RNA-binding domain of Nxf1 to enable mRNA export.
复制标题

DOI:
10.1038/ncomms2005
复制
发表时间:
2012
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

后生动物 TREX 复合物在核 RNA 加工过程中被招募到 mRNA 中,并发挥将 mRNA 输出到细胞质的作用。 Nxf1 是一种 mRNA 输出受体,它结合加工后的 mRNA 并将其转运通过核孔复合体。目前TREX和Nxf1之间的关系尚不清楚。在这里,我们证明 Nxf1 利用分子内相互作用来抑制其自身的 RNA 结合活性。当 TREX 亚基 Aly 和 Thoc5 与 Nxf1 接触时,Nxf1 被驱动进入开放构象,暴露其 RNA 结合域,从而允许 RNA 结合。此外,Aly 和 Thoc5 的联合敲低大大减少了体内 Nxf1 与 mRNA 结合的量,并导致严重的 mRNA 输出阻断。总之,我们的数据表明 TREX 通过将 Nxf1 驱动成能够结合 mRNA 的构象来提供 mRNA 输出的许可。
The metazoan TREX complex is recruited to mRNA during nuclear RNA processing and functions in exporting mRNA to the cytoplasm. Nxf1 is an mRNA export receptor, which binds processed mRNA and transports it through the nuclear pore complex. At present, the relationship between TREX and Nxf1 is not understood. Here we show that Nxf1 uses an intramolecular interaction to inhibit its own RNA binding activity. When the TREX subunits Aly and Thoc5 make contact with Nxf1, Nxf1 is driven into an open conformation, exposing its RNA binding domain, allowing RNA binding. Moreover, the combined knockdown of Aly and Thoc5 drastically reduces the amount of Nxf1 bound to mRNA in vivo and also causes a severe mRNA export block. Together, our data indicate that TREX provides a license for mRNA export by driving Nxf1 into a conformation capable of binding mRNA.
DOI: 10.1016/j.molcel.2008.12.007
发表时间: 2009-01-30
期刊: MOLECULAR CELL
影响因子: 16
作者:
Johnson, Sara Ann;Cubberley, Gabrielle;Bentley, David L.
通讯作者: Bentley, David L.
DOI: 10.1093/emboj/18.7.1953
发表时间: 1999-04-01
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Braun, IC;Rohrbach, E;Izaurralde, E
通讯作者: Izaurralde, E
DOI: 10.1073/pnas.042698599
发表时间: 2002-02-19
影响因子: 11.1
作者:
Ho, DN;Coburn, GA;Georgiadis, MM
通讯作者: Georgiadis, MM
DOI: 10.1093/emboj/18.9.2593
发表时间: 1999-05-04
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Katahira, J;Strässer, K;Hurt, E
通讯作者: Hurt, E
DOI: 10.1016/j.cell.2006.10.044
发表时间: 2006-12-29
期刊: CELL
影响因子: 64.5
作者:
Cheng, Hong;Dufu, Kobina;Reed, Robin
通讯作者: Reed, Robin