NUCKS1 promotes RAD54 activity in homologous recombination DNA repair.

NUCKS1 promotes RAD54 activity in homologous recombination DNA repair.
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DOI:
10.1083/jcb.201911049
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发表时间:
2020-10-05
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Wiese C
Wiese C
中科院分区:
其他
文献类型:
--
作者:
Maranon DG;Sharma N;Huang Y;Selemenakis P;Wang M;Altina N;Zhao W;Wiese C

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Maranon等人已经鉴定NUCKS 1蛋白作为同源重组DNA修复中时空事件的新调节剂。NUCKS 1在RAD 51细丝形成期间阻止RAD 54-RAD 51 AP 1缔合,并在置换环形成中与RAD 54活性协同。NUCKS 1(nuclear ubiquitin casein kinase and cyclin-dependent kinase substrate 1)是一种与染色质相关的、脊椎动物特异性的多功能蛋白,在DNA损伤信号传导和修复中起作用。以前,我们已经证明NUCKS 1有助于维持人类细胞中的同源重组(HR)DNA修复,并在小鼠中作为肿瘤抑制因子发挥作用。然而,NUCKS 1对这些过程产生积极影响的机制仍不清楚。在这里,我们表明,NUCKS 1物理和功能相互作用的DNA马达蛋白RAD 54。当人类细胞暴露于DNA损伤剂时,NUCKS 1控制RAD 54焦点的分辨率。在未受干扰的细胞中,NUCKS 1阻止RAD 54与RAD 51 AP 1的不适当接合。在体外,NUCKS 1刺激RAD 54的ATP酶活性和RAD 51-RAD 54介导的链侵入步骤在置换环形成期间。总之,我们的数据表明,NUCKS 1蛋白是一个重要的新的调节器的时空事件在HR。
Maranon et al. have identified the NUCKS1 protein as a new regulator of the spatiotemporal events in homologous recombination DNA repair. NUCKS1 prevents RAD54–RAD51AP1 association during RAD51 filament formation and synergizes with RAD54 activity in displacement loop formation. NUCKS1 (nuclear ubiquitous casein kinase and cyclin-dependent kinase substrate 1) is a chromatin-associated, vertebrate-specific, and multifunctional protein with a role in DNA damage signaling and repair. Previously, we have shown that NUCKS1 helps maintain homologous recombination (HR) DNA repair in human cells and functions as a tumor suppressor in mice. However, the mechanisms by which NUCKS1 positively impacts these processes had remained unclear. Here, we show that NUCKS1 physically and functionally interacts with the DNA motor protein RAD54. Upon exposure of human cells to DNA-damaging agents, NUCKS1 controls the resolution of RAD54 foci. In unperturbed cells, NUCKS1 prevents RAD54’s inappropriate engagement with RAD51AP1. In vitro, NUCKS1 stimulates the ATPase activity of RAD54 and the RAD51–RAD54-mediated strand invasion step during displacement loop formation. Taken together, our data demonstrate that the NUCKS1 protein is an important new regulator of the spatiotemporal events in HR.
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