The structural basis of translational control by eIF2 phosphorylation
The structural basis of translational control by eIF2 phosphorylation
复制标题
eIF2磷酸化控制翻译的结构基础
DOI:
10.1101/501411
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Adomavicius T
中科院分区:
文献类型:
--
作者:
Adomavicius T
Protein synthesis in eukaryotes is controlled by signals and stresses via a common pathway, called the integrated stress response (ISR). Phosphorylation of the translation initiation factor eIF2 alpha at a conserved serine residue mediates translational control at the ISR core. To provide insight into the mechanism of translational control we have determined the structures of eIF2 both in phosphorylated and unphosphorylated forms bound with its nucleotide exchange factor eIF2B by electron cryomicroscopy. The structures reveal that eIF2 undergoes large rearrangements to promote binding of eIF2α to the regulatory core of eIF2B comprised of the eIF2B alpha, beta and delta subunits. Only minor differences are observed between eIF2 and eIF2αP binding to eIF2B, suggesting that the higher affinity of eIF2αP for eIF2B drives translational control. We present a model for controlled nucleotide exchange and initiator tRNA binding to the eIF2/eIF2B complex.
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DOI:
10.1073/pnas.90.15.7215
发表时间:
1993
影响因子:
11.1
作者:
C. R. Vázquez de Aldana;T. Dever;A. Hinnebusch
通讯作者:
A. Hinnebusch
影响因子:
--
作者:
E. Krissinel
通讯作者:
E. Krissinel
影响因子:
5.6
作者:
Dhaliwal, S;Hoffman, DW
通讯作者:
Hoffman, DW
影响因子:
4.8
作者:
Williams, DD;Price, NT;Proud, CG
通讯作者:
Proud, CG
影响因子:
16
作者:
Llácer JL;Hussain T;Marler L;Aitken CE;Thakur A;Lorsch JR;Hinnebusch AG;Ramakrishnan V
通讯作者:
Ramakrishnan V