Paf1 and Ctr9 subcomplex formation is essential for Paf1 complex assembly and functional regulation.

Paf1 and Ctr9 subcomplex formation is essential for Paf1 complex assembly and functional regulation.
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Paf1 和 Ctr9 亚复合体的形成对于 Paf1 复合体的组装和功能调节至关重要

DOI:
10.1038/s41467-018-06237-7
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发表时间:
2018-09-18
影响因子:
16.6
通讯作者:
Long J
Long J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Xie Y;Zheng M;Chu X;Chen Y;Xu H;Wang J;Zhou H;Long J

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进化上保守的多功能聚合酶相关因子1(Paf 1)复合物(Paf 1C)由至少5个亚基(Paf 1、Leo 1、Ctr 9、Cdc 73和Rtf 1)组成,在基因调控中起重要作用,并与发育和人类疾病有关。在这里,我们报告两个结构的每个人和酵母Ctr 9/Paf 1亚复合物,组装成具有非常相似的构象异二聚体,揭示了在Ctr 9和Paf 1的tetratricopeptide重复模块之间的接口。Ctr 9/Paf 1亚复合物的结构可能为人类PAF 1和CTR 9中的疾病相关突变提供机制解释。我们的研究表明,Ctr 9/Paf 1异源二聚体的形成是酵母Paf 1C组装所必需的,并且是酵母活力所必需的。此外,破坏Paf 1和Ctr 9之间的相互作用极大地影响了体内组蛋白H3甲基化的水平。总的来说,我们的研究结果揭示了Paf 1C组装和功能调节。
The evolutionarily conserved multifunctional polymerase-associated factor 1 (Paf1) complex (Paf1C), which is composed of at least five subunits (Paf1, Leo1, Ctr9, Cdc73, and Rtf1), plays vital roles in gene regulation and has connections to development and human diseases. Here, we report two structures of each of the human and yeast Ctr9/Paf1 subcomplexes, which assemble into heterodimers with very similar conformations, revealing an interface between the tetratricopeptide repeat module in Ctr9 and Paf1. The structure of the Ctr9/Paf1 subcomplex may provide mechanistic explanations for disease-associated mutations in human PAF1 and CTR9. Our study reveals that the formation of the Ctr9/Paf1 heterodimer is required for the assembly of yeast Paf1C, and is essential for yeast viability. In addition, disruption of the interaction between Paf1 and Ctr9 greatly affects the level of histone H3 methylation in vivo. Collectively, our results shed light on Paf1C assembly and functional regulation.
去磷酸化的parafibromin是Wnt/HedgeHog/Notch途径的转录共激活因子。
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发表时间: 2016-09-21
影响因子: 16.6
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