Structural basis for the multi-activity factor Rad5 in replication stress tolerance.

Structural basis for the multi-activity factor Rad5 in replication stress tolerance.
复制标题

复制应激耐受中多活性因子Rad5的结构基础

DOI:
10.1038/s41467-020-20538-w
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发表时间:
2021-01-12
影响因子:
16.6
通讯作者:
Xiang S
Xiang S
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Shen M;Dhingra N;Wang Q;Cheng C;Zhu S;Tian X;Yu J;Gong X;Li X;Zhang H;Xu X;Zhai L;Xie M;Gao Y;Deng H;He Y;Niu H;Zhao X;Xiang S

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酵母蛋白 Rad5 及其在其他真核生物中的直系同源物利用其多种活性(包括泛素连接酶、复制叉重塑和 DNA 损伤靶向活性)促进复制应激耐受性和细胞存活。在这里,我们展示了几乎全长的 Rad5 蛋白的晶体结构。该结构显示了 Rad5 活动所需的三个不同但相互关联的领域。这些域的空间排列表明,不同的域可以具有自主活动,但也可以进行内在的协调。此外,我们的结构、生化和细胞研究表明,Rad5的HIRAN结构域介导与DNA代谢大师因子PCNA的相互作用,并有助于其多泛素化,与DNA结合并有助于Rad5催化的复制叉回归,定义了一种具有多种活性的新型HIRAN结构域。我们的工作提供了一个框架来理解 Rad5 如何在复制压力耐受中整合其各种活动。
The yeast protein Rad5 and its orthologs in other eukaryotes promote replication stress tolerance and cell survival using their multiple activities, including ubiquitin ligase, replication fork remodeling and DNA lesion targeting activities. Here, we present the crystal structure of a nearly full-length Rad5 protein. The structure shows three distinct, but well-connected, domains required for Rad5’s activities. The spatial arrangement of these domains suggest that different domains can have autonomous activities but also undergo intrinsic coordination. Moreover, our structural, biochemical and cellular studies demonstrate that Rad5’s HIRAN domain mediates interactions with the DNA metabolism maestro factor PCNA and contributes to its poly-ubiquitination, binds to DNA and contributes to the Rad5-catalyzed replication fork regression, defining a new type of HIRAN domains with multiple activities. Our work provides a framework to understand how Rad5 integrates its various activities in replication stress tolerance.
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