Chromatin-bound nuclear pore components regulate gene expression in higher eukaryotes.

Chromatin-bound nuclear pore components regulate gene expression in higher eukaryotes.
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DOI:
10.1016/j.cell.2009.12.054
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发表时间:
2010-02-05
期刊:
影响因子:
64.5
通讯作者:
Hetzer MW
Hetzer MW
中科院分区:
生物学1区
文献类型:
--
作者:
Capelson M;Liang Y;Schulte R;Mair W;Wagner U;Hetzer MW

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核孔复合体最近被证明在基因激活中发挥作用,但其在后生动物转录中的潜在参与仍不清楚。在这里,我们表明,核孔蛋白Sec 13,Nup 98和Nup 88,以及一组FG-重复核孔蛋白,绑定到果蝇基因组在功能上不同的位点,往往不代表NE接触网站。虽然Nup 88定位于沉默位点,Sec 13,Nup 98和FG重复核孔蛋白的子集结合到经历转录诱导的发育调节基因。引人注目的是,RNAi介导的核内Sec 13和Nup 98的敲低特异性地抑制其靶基因的转录,并防止热休克后转录的有效再激活,这表明NPC组分在调节多细胞生物体的复杂基因表达程序中起重要作用。
Nuclear pore complexes have recently been shown to play roles in gene activation, however their potential involvement in metazoan transcription remains unclear. Here we show that the nucleoporins Sec13, Nup98 and Nup88, as well as a group of FG-repeat nucleoporins, bind to the Drosophila genome at functionally distinct loci that often do not represent NE contact sites. While Nup88 localizes to silent loci, Sec13, Nup98 and a subset of FG-repeat nucleoporins bind to developmentally regulated genes undergoing transcription induction. Strikingly, RNAi-mediated knockdown of intranuclear Sec13 and Nup98 specifically inhibits transcription of their target genes and prevents efficient reactivation of transcription after heat shock, suggesting an essential role of NPC components in regulating complex gene expression programs of multicellular organisms.
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