WRNIP1 functions upstream of DNA polymerase η in the UV-induced DNA damage response.

WRNIP1 functions upstream of DNA polymerase η in the UV-induced DNA damage response.
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在紫外线诱导的 DNA 损伤反应中,WRNIP1 在 DNA 聚合酶 η 的上游发挥作用。

DOI:
10.1016/j.bbrc.2014.08.043
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发表时间:
2014
期刊:
Biochem. Biophys. Res. Commun.
影响因子:
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通讯作者:
T.
T.
中科院分区:
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文献类型:
--
作者:
Yoshimura;A.;Kobayashi;Y.;Tada;S.;Seki;M.;Enomoto;T.

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WRNIP1 (WRN相互作用蛋白1)首先被发现是一个与WRN相互作用的因子,WRN是Werner综合征(WS)中有缺陷的蛋白。WRNIP1与DNA聚合酶η (Polη)相关,但这种相互作用的生物学意义尚不清楚。在这项研究中,我们通过在DT40鸡细胞中敲除WRNIP1和Polη基因来分析两者之间的功能相互作用。POLH−/−细胞中wrnip1的破坏抑制了与Polη损失相关的表型:对紫外线(UV)的敏感性,环丁烷嘧啶二聚体(CPD)的延迟修复,突变频率升高,紫外线诱导的姐妹染色单体交换(SCE)水平升高,以及紫外线照射后分叉进展率降低。这些结果表明,WRNIP1在Polη响应的上游起作用。
WRNIP1 (WRN-interacting protein 1) was first identified as a factor that interacts with WRN, the protein that is defective in Werner syndrome (WS). WRNIP1 associates with DNA polymerase η (Polη), but the biological significance of this interaction remains unknown. In this study, we analyzed the functional interaction between WRNIP1 and Polη by generating knockouts of both genes in DT40 chicken cells. Disruption ofWRNIP1in Polη-disrupted (POLH−/−) cells suppressed the phenotypes associated with the loss of Polη: sensitivity to ultraviolet light (UV), delayed repair of cyclobutane pyrimidine dimers (CPD), elevated frequency of mutation, elevated levels of UV-induced sister chromatid exchange (SCE), and reduced rate of fork progression after UV irradiation. These results suggest that WRNIP1 functions upstream of Polη in the response to UV irradiation.
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