Cryo-EM structure of the human CST-Polα/primase complex in a recruitment state.

Cryo-EM structure of the human CST-Polα/primase complex in a recruitment state.
复制标题

DOI:
10.1038/s41594-022-00766-y
复制
发表时间:
2022-08
影响因子:
16.8
通讯作者:
de Lange, Titia
de Lange, Titia
中科院分区:
生物学1区
文献类型:
--
作者:
Cai, Sarah W.;Zinder, John C.;Svetlov, Vladimir;Bush, Martin W.;Nudler, Evgeny;Walz, Thomas;de Lange, Titia

文献摘要

参考文献

被引文献

相似文献

Cst-Polα/Primase复合体对于端粒的维持和在双链断裂时抵消切除的功能是必不可少的。我们报道了人cst-Polα/Primase的4.6o分辨率低温EM结构,该结构在催化前被捕获,通过化学交联稳定的招募状态。我们的结构揭示了后生动物CTC1中催化POLA1亚单位的C-末端结构域与N-末端扩展之间的进化保守相互作用。交联质谱和负染色EM分析提供了通过灵活的POLA1 N末端与CST结合的洞察力。最后,Coats Plus综合征疾病突变以前的特征是扰乱cst-POLα/Primase复合体的形成,映射到在招募状态下观察到的蛋白质-蛋白质界面。总而言之,我们的结果揭示了后生动物填充机械的体系结构和化学计量比。对人Cst-PolDNA/Primase复合体的冷冻-EM分析揭示了Cst与α聚合酶α之间的一种后生动物特有的相互作用模式,该模式被认为在POLα/Primase的端粒募集中发挥作用,以维持C链。
The CST–Polα/primase complex is essential for telomere maintenance and functions to counteract resection at double-strand breaks. We report a 4.6-Å resolution cryo-EM structure of human CST–Polα/primase, captured prior to catalysis in a recruitment state stabilized by chemical cross-linking. Our structure reveals an evolutionarily conserved interaction between the C-terminal domain of the catalytic POLA1 subunit and an N-terminal expansion in metazoan CTC1. Cross-linking mass spectrometry and negative-stain EM analysis provide insight into CST binding by the flexible POLA1 N-terminus. Finally, Coats plus syndrome disease mutations previously characterized to disrupt formation of the CST–Polα/primase complex map to protein–protein interfaces observed in the recruitment state. Together, our results shed light on the architecture and stoichiometry of the metazoan fill-in machinery. Cryo-EM analysis of the human CST–Polα/primase complex reveals a metazoan-specific mode of interaction between CST and DNA polymerase α that is proposed to function in telomeric recruitment of Polα/primase for C-strand maintenance.
DOI: 10.1038/nmeth1139
发表时间: 2008-01-01
期刊: NATURE METHODS
影响因子: 48
作者:
Kastner, Berthold;Fischer, Niels;Stark, Holger
通讯作者: Stark, Holger
DOI: 10.1126/science.aaz9649
发表时间: 2020-06-05
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Lim CJ;Barbour AT;Zaug AJ;Goodrich KJ;McKay AE;Wuttke DS;Cech TR
通讯作者: Cech TR
DOI: 10.1038/nature11269
发表时间: 2012-08-23
期刊: NATURE
影响因子: 64.8
作者:
Chen, Liuh-Yow;Redon, Sophie;Lingner, Joachim
通讯作者: Lingner, Joachim
DOI: 10.1107/s0907444909052925
发表时间: 2010-02
期刊: Acta crystallographica. Section D, Biological crystallography
影响因子: --
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者: Zwart PH
DOI: 10.1093/bioinformatics/btm404
发表时间: 2007-11-01
期刊: BIOINFORMATICS
影响因子: 5.8
作者:
Larkin, M. A.;Blackshields, G.;Higgins, D. G.
通讯作者: Higgins, D. G.