eIF2B: recent structural and functional insights into a key regulator of translation.

eIF2B: recent structural and functional insights into a key regulator of translation.
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eIF2B:最近对翻译关键调节因子的结构和功能见解。

DOI:
10.1042/bst20150164
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发表时间:
2015
影响因子:
3.9
通讯作者:
Wortham NC
Wortham NC
中科院分区:
生物学3区
文献类型:
--
作者:
Wortham NC

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真核生物翻译起始因子(EIF)eIF2B是mRNA翻译的关键调节因子,是负责异源三聚体G蛋白eIF2循环的鸟嘌呤核苷酸交换因子(Egf),而eIF2是翻译起始所必需的。对于全球环境基金来说,eIF2B不同寻常的是,它是一种多亚基蛋白质,由五个不同的亚基组成,称为α到ε,按大小顺序排列。EIF2B在细胞内受到严格的监管,还可能发挥额外的功能。在这里,我们回顾了对哺乳动物eIF2B复合体的亚基组织的最新见解,这些见解来自对该复合体的结构研究和对eIF2B突变的研究,这些突变导致神经紊乱的白质消失白质脑病(VWM)。我们还将讨论来自酵母的最新数据,展示eIF2B复合体关键字对翻译调控的新功能。
The eukaryotic translation initiation factor (eIF) eIF2B is a key regulator of mRNA translation, being the guanine nt exchange factor (GEF) responsible for the recycling of the heterotrimeric G-protein, eIF2, which is required to allow translation initiation to occur. Unusually for a GEF, eIF2B is a multi-subunit protein, comprising five different subunits termed α through ε in order of increasing size. eIF2B is subject to tight regulation in the cell and may also serve additional functions. Here we review recent insights into the subunit organization of the mammalian eIF2B complex, gained both from structural studies of the complex and from studies of mutations of eIF2B that result in the neurological disorder leukoencephalopathy with vanishing white matter (VWM). We will also discuss recent data from yeast demonstrating a novel function of the eIF2B complex key for translational regulation.
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eIF2B,真核起始因子 2 的鸟嘌呤核苷酸交换因子。来自哺乳动物和酵母的 eIF2B 的 α、β 和 δ 亚基之间的序列保守性。
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