DNA polymerase beta participates in DNA End-joining.

DNA polymerase beta participates in DNA End-joining.
复制标题

DOI:
10.1093/nar/gkx1147
复制
发表时间:
2018-01-09
影响因子:
14.9
通讯作者:
Sweasy JB
Sweasy JB
中科院分区:
生物学2区
文献类型:
--
作者:
Ray S;Breuer G;DeVeaux M;Zelterman D;Bindra R;Sweasy JB

文献摘要

参考文献

被引文献

相似文献

DNA双链断裂(DSB)是最有害的损伤之一,如果不修复,它们会导致细胞死亡,基因组不稳定和致癌。细胞通过两种途径对抗DSB:同源重组(HR)和非同源末端连接(NHEJ),其中两个DNA末端重新连接。最近已经报道了备用NHEJ途径,并且被称为替代NHEJ(aNHEJ),其连接末端但导致缺失和插入。NHEJ需要加工酶,包括核酸酶和聚合酶,尽管这些酶的作用知之甚少。新出现的证据表明X家族DNA聚合酶lambda(Pol λ)和mu(Pol μ)促进DNA末端连接。在这里,我们表明DNA聚合酶β(Pol β),DNA聚合酶X家族的另一个成员,在aNHEJ中发挥作用。在不存在DNA Pol β的情况下,观察到较少的小缺失。此外,由于DSB的修复缺陷,Pol β的缺失导致细胞对博来霉素和DNA蛋白激酶催化亚基抑制剂的敏感性。总之,我们的结果表明Pol β in在aNHEJ中起作用,并提供了对其在该过程中的作用的机制见解。
DNA double strand breaks (DSBs) are one of the most deleterious lesions and if left unrepaired, they lead to cell death, genomic instability and carcinogenesis. Cells combat DSBs by two pathways: homologous recombination (HR) and non-homologous end-joining (NHEJ), wherein the two DNA ends are re-joined. Recently a back-up NHEJ pathway has been reported and is referred to as alternative NHEJ (aNHEJ), which joins ends but results in deletions and insertions. NHEJ requires processing enzymes including nucleases and polymerases, although the roles of these enzymes are poorly understood. Emerging evidence indicates that X family DNA polymerases lambda (Pol λ) and mu (Pol μ) promote DNA end-joining. Here, we show that DNA polymerase beta (Pol β), another member of the X family of DNA polymerases, plays a role in aNHEJ. In the absence of DNA Pol β, fewer small deletions are observed. In addition, depletion of Pol β results in cellular sensitivity to bleomycin and DNA protein kinase catalytic subunit inhibitors due to defective repair of DSBs. In summary, our results indicate that Pol β in functions in aNHEJ and provide mechanistic insight into its role in this process.
DOI: 10.1038/nsmb.1943
发表时间: 2010-12
影响因子: 16.8
作者:
通讯作者: --
DNA-PKcs 的差异磷酸化调节非同源末端连接过程中末端加工和末端连接之间的相互作用。
DOI: 10.1016/j.molcel.2015.02.024
发表时间: 2015-04-02
期刊: Molecular cell
影响因子: 16
作者:
Jiang W;Crowe JL;Liu X;Nakajima S;Wang Y;Li C;Lee BJ;Dubois RL;Liu C;Yu X;Lan L;Zha S
通讯作者: Zha S
DOI: 10.1038/nmeth.1923
发表时间: 2012-03-04
期刊: NATURE METHODS
影响因子: 48
作者:
Langmead, Ben;Salzberg, Steven L.
通讯作者: Salzberg, Steven L.
DOI: 10.1186/2041-9414-3-9
发表时间: 2012-11-27
期刊: Genome integrity
影响因子: --
作者:
Brandsma I;Gent DC
通讯作者: Gent DC
DOI: 10.1038/nsmb.2961
发表时间: 2015-03
影响因子: 16.8
作者:
Kent, Tatiana;Chandramouly, Gurushankar;McDevitt, Shane Michael;Ozdemir, Ahmet Y.;Pomerantz, Richard T.
通讯作者: Pomerantz, Richard T.