The 3' processing factor CstF functions in the DNA repair response.

The 3' processing factor CstF functions in the DNA repair response.
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DOI:
10.1093/nar/gkn005
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发表时间:
2008-04
影响因子:
14.9
通讯作者:
Kleiman FE
Kleiman FE
中科院分区:
生物学2区
文献类型:
--
作者:
Mirkin N;Fonseca D;Mohammed S;Cevher MA;Manley JL;Kleiman FE

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DNA损伤后,mRNA水平下降,反映了DNA修复、转录和RNA加工机制的协调相互作用。在这项研究中,我们提供的证据表明,mRNA前体的转录和聚腺苷化都受到紫外线处理的影响。我们接下来表明,聚腺苷化因子CstF在DNA损伤反应中起直接作用。CstF水平降低的细胞在紫外线处理后表现出活力下降,泛素化RNA聚合酶II (RNAP II)能力降低,DNA损伤修复缺陷。此外,我们发现CstF、RNAP II和BARD1都存在于修复DNA的位点上。我们的研究结果表明,CstF在DNA损伤响应中发挥积极作用,在转录偶联RNA加工和DNA修复之间提供了联系。
Following DNA damage, mRNA levels decrease, reflecting a coordinated interaction of the DNA repair, transcription and RNA processing machineries. In this study, we provide evidence that transcription and polyadenylation of mRNA precursors are both affected in vivo by UV treatment. We next show that the polyadenylation factor CstF, plays a direct role in the DNA damage response. Cells with reduced levels of CstF display decreased viability following UV treatment, reduced ability to ubiquitinate RNA polymerase II (RNAP II), and defects in repair of DNA damage. Furthermore, we show that CstF, RNAP II and BARD1 are all found at sites of repaired DNA. Our results indicate that CstF plays an active role in the response to DNA damage, providing a link between transcription-coupled RNA processing and DNA repair.
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