Structure of the 80S ribosome–Xrn1 nuclease complex
Structure of the 80S ribosome–Xrn1 nuclease complex
复制标题
80S 核糖体âXrn1 核酸酶复合物的结构
DOI:
10.1038/s41594-019-0202-5
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发表时间:
2019
影响因子:
16.8
通讯作者:
Beckmann
中科院分区:
文献类型:
--
作者:
Tesina;Heckel;Fromont-Racine;Buschauer;Beatrix;Berninghausen;Jacquier;Becker;Beckmann
Messenger RNA (mRNA) homeostasis represents an essential part of gene expression, in which the generation of mRNA by RNA polymerase is counter-balanced by its degradation by nucleases. The conserved 5′-to-3′ exoribonuclease Xrn1 has a crucial role in eukaryotic mRNA homeostasis by degrading decapped or cleaved mRNAs post-translationally and, more surprisingly, also co-translationally. Here we report that active Xrn1 can directly and specifically interact with the translation machinery. A cryo-electron microscopy structure of a programmedSaccharomyces cerevisiae80S ribosome–Xrn1 nuclease complex reveals how the conserved core of Xrn1 enables binding at the mRNA exit site of the ribosome. This interface provides a conduit for channelling of the mRNA from the ribosomal decoding site directly into the active center of the nuclease, thus separating mRNA decoding from degradation by only 17 ± 1 nucleotides. These findings explain how rapid 5′-to-3′ mRNA degradation is coupled efficiently to its final round of mRNA translation.
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影响因子:
16
作者:
Jinek M;Coyle SM;Doudna JA
通讯作者:
Doudna JA
影响因子:
64.5
作者:
Pelechano V;Wei W;Steinmetz LM
通讯作者:
Steinmetz LM
影响因子:
11.4
作者:
Roy, Bijoyita;Jacobson, Allan
通讯作者:
Jacobson, Allan
DOI:
10.1016/j.bbagrm.2013.03.005
发表时间:
2013-06
影响因子:
4.7
作者:
Nagarajan, Vinay K.;Jones, Christopher I.;Newbury, Sarah F.;Green, Pamela J.
通讯作者:
Green, Pamela J.
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
Ken Ikeuchi;P. Tesina;Y. Matsuo;Takato Sugiyama;Jingdong Cheng;Y. Saeki;Keiji Tanaka;T. Becker;R. Beckmann;T. Inada
通讯作者:
T. Inada