A pair of RNA-binding proteins controls networks of splicing events contributing to specialization of neural cell types.

A pair of RNA-binding proteins controls networks of splicing events contributing to specialization of neural cell types.
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一对RNA结合蛋白控制剪接事件网络,有助于神经细胞类型的专业化。

DOI:
10.1016/j.molcel.2014.05.004
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发表时间:
2014-06-19
期刊:
影响因子:
16
通讯作者:
Calarco, John A.
Calarco, John A.
中科院分区:
生物学1区
文献类型:
--
作者:
Norris, Adam D.;Gao, Shangbang;Norris, Megan L.;Ray, Debashish;Ramani, Arun K.;Fraser, Andrew G.;Morris, Quaid;Hughes, Timothy R.;Zhen, Mei;Calarco, John A.

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选择性剪接对神经系统的发育和功能很重要,但人们对不同类型神经元之间选择性剪接的差异知之甚少。此外,控制细胞类型特异性剪接的因素以及这些替代异构体的生理作用尚不清楚。通过监测秀丽线虫在单细胞分辨率下的选择性剪接,我们证明了不同神经元中的剪接模式通常是不同的和高度调控的。我们发现了两个保守的RNA结合蛋白,UNC-75/CELF和EXC-7/HU/ELAV,它们调节GABA能和胆碱能神经元中剪接事件的重叠网络。我们使用UNC-75外显子网络来发现突触传递的调节因子,并确定UNC-/Synaxin亚型的独特作用,这是突触小泡融合所需的蛋白质。我们的结果表明,不同神经元中选择性剪接的组合调控为后生动物神经系统的专门化提供了一种机制。
Alternative splicing is important for the development and function of the nervous system, but little is known about the differences in alternative splicing between distinct types of neurons. Furthermore, the factors that control cell-type-specific splicing and the physiological roles of these alternative isoforms are unclear. By monitoring alternative splicing at single cell resolution in Caenorhabditis elegans, we demonstrate that splicing patterns in different neurons are often distinct and highly regulated. We identify two conserved RNA binding proteins, UNC-75/CELF and EXC-7/Hu/ELAV, which regulate overlapping networks of splicing events in GABAergic and cholinergic neurons. We use the UNC-75 exon network to discover regulators of synaptic transmission and to identify unique roles for isoforms of UNC-64/Syntaxin, a protein required for synaptic vesicle fusion. Our results indicate that combinatorial regulation of alternative splicing in distinct neurons provides a mechanism to specialize metazoan nervous systems.
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