Splicing and transcription touch base: co-transcriptional spliceosome assembly and function.

Splicing and transcription touch base: co-transcriptional spliceosome assembly and function.
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DOI:
10.1038/nrm.2017.63
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发表时间:
2017-10
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
通讯作者:
Neugebauer KM
Neugebauer KM
中科院分区:
其他
文献类型:
--
作者:
Herzel L;Ottoz DSM;Alpert T;Neugebauer KM

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几个大分子机器协作产生真核生物信使RNA。RNA聚合酶II(Pol II)沿着长度高达数百万个碱基对的基因移位沿着,并产生DNA模板的柔性RNA拷贝。这种新生的RNA含有内含子,内含子被剪接体去除,剪接体是一种兆道尔顿的核糖核蛋白复合物,将内含子的远端定位在其催化中心。新出现的证据表明,催化spliceosome物理上接近Pol II在体内意味着转录和剪接发生在类似的时间尺度上,转录和剪接机制可能受到空间限制。在这篇综述中,我们讨论了剪接体组装,转录延伸和其他共转录事件,使时间协调的共转录剪接方面。
Several macromolecular machines collaborate to produce eukaryotic messenger RNA. RNA polymerase II (Pol II) translocates along genes that are up to millions of base pairs in length and generates a flexible RNA copy of the DNA template. This nascent RNA harbours introns that are removed by the spliceosome, which is a megadalton ribonucleoprotein complex that positions the distant ends of the intron into its catalytic centre. Emerging evidence that the catalytic spliceosome is physically close to Pol II in vivo implies that transcription and splicing occur on similar timescales and that the transcription and splicing machineries may be spatially constrained. In this Review, we discuss aspects of spliceosome assembly, transcription elongation and other co-transcriptional events that allow the temporal coordination of co-transcriptional splicing.
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