The spliceosome: a flexible, reversible macromolecular machine.

The spliceosome: a flexible, reversible macromolecular machine.
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DOI:
10.1016/j.tibs.2012.02.009
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发表时间:
2012-05
影响因子:
13.8
通讯作者:
Moore, Melissa J.
Moore, Melissa J.
中科院分区:
生物学1区
文献类型:
--
作者:
Hoskins, Aaron A.;Moore, Melissa J.

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剪接体是真核细胞中最复杂的大分子机器,拥有超过100个单独的RNA和蛋白质部分以及高度动态的组装和拆卸途径。这种复杂性使得剪接的动力学和力学分析变得非常具有挑战性。然而,最近的技术进步正在为更详细地理解这一过程提供工具。从对剪接的全基因组分析和体内正交剪接体的创建,到活性剪接体的纯化和体外单分子的观察,这些新的实验方法对这台非凡机器的内部工作原理产生了重要的见解。这些实验正在改写教科书,呈现出一幅新的图景:一个动态的、可塑的机器,受到其前mrna底物身份的严重影响。
With more than a hundred individual RNA and protein parts and a highly dynamic assembly and disassembly pathway, the spliceosome is arguably the most complicated macromolecular machine in the eukaryotic cell. This complexity has made kinetic and mechanistic analysis of splicing incredibly challenging. Yet recent technological advances are now providing tools for understanding this process in much greater detail. Ranging from genome-wide analyses of splicing and creation of an orthogonal spliceosome in vivo, to purification of active spliceosomes and observation of single molecules in vitro, such new experimental approaches are yielding significant insight into the inner workings of this remarkable machine. These experiments are rewriting the textbooks, with a new picture emerging of a dynamic, malleable machine heavily influenced by the identity of its pre-mRNA substrate.
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