...
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Nonhomologous end joining and V(D)J recombination require an additional factor.
【24h】

Nonhomologous end joining and V(D)J recombination require an additional factor.

机译:非同源末端连接和V(D)J重组需要其他因素。

获取原文
获取原文并翻译 | 示例
           

摘要

DNA nonhomologous end-joining (NHEJ) is the major pathway for repairing DNA double-strand breaks in mammalian cells. It also functions to carry out rearrangements at the specialized breaks introduced during V(D)J recombination. Here, we describe a patient with T(-)B(-) severe combined immunodeficiency, whose cells have defects closely resembling those of NHEJ-defective rodent cells. Cells derived from this patient show dramatic radiosensitivity, decreased double-strand break rejoining, and reduced fidelity in signal and coding joint formation during V(D)J recombination. Detailed examination indicates that the patient is defective neither in the known factors involved in NHEJ in mammals (Ku70, Ku80, DNA-dependent protein kinase catalytic subunit, Xrcc4, DNA ligase IV, or Artemis) nor in the Mre11/Rad50/Nbs1 complex, whose homologue in Saccharomyces cerevisiae functions in NHEJ. These results provide strong evidence that additional activities are crucial for NHEJ and V(D)J recombination in mammals.
机译:DNA非同源末端连接(NHEJ)是修复哺乳动物细胞中DNA双链断裂的主要途径。它也可以在V(D)J重组期间引入的特殊中断处进行重排。在这里,我们描述了一个患有T(-)B(-)严重联合免疫缺陷病的患者,其细胞的缺陷与NHEJ缺陷型啮齿动物的缺陷非常相似。源自该患者的细胞在V(D)J重组过程中表现出显着的放射敏感性,双链断裂重新结合减少,信号和编码接头形成的保真度降低。详细检查表明,该患者既没有在哺乳动物中参与NHEJ的已知因子(Ku70,Ku80,DNA依赖性蛋白激酶催化亚基,Xrcc4,DNA连接酶IV或Artemis)也没有缺陷,其在酿酒酵母中的同源物在NHEJ中起作用。这些结果提供了有力的证据,表明其他活动对于哺乳动物中的NHEJ和V(D)J重组至关重要。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号