Multiple functions of MRN in end-joining pathways during isotype class switching.

Multiple functions of MRN in end-joining pathways during isotype class switching.
复制标题

DOI:
10.1038/nsmb.1639
复制
发表时间:
2009-08
影响因子:
16.8
通讯作者:
--
中科院分区:
生物学1区
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

Mre11/Rad50/NBS1(MRN)复合体在DNA双链断裂(DSB)反应中发挥着多种作用,但其在非同源末端连接(NHEJ)修复中的作用却知之甚少。我们研究了类开关重组(CSR)中对MRN的要求,CSR是B淋巴细胞中的一种程序性DNA重排,需要NHEJ。为此,我们改造了在B淋巴细胞中缺乏完整MRN复合体的小鼠,或者拥有一个完整的复合体,其中含有缺乏DNA核酸酶活性的突变体Mre11。MRN缺乏症是CSR的一个显著缺陷,影响经典和替代NHEJ途径。相反,缺乏Mre11核酸酶活性会导致较温和的表型,显示出复合体内功能的分离。我们提出了一个模型,在这个模型中,MRN稳定了远距离的断裂,并处理了DNA末端,以促进经典和替代NHEJ途径的修复。
The Mre11/Rad50/NBS1 (MRN) complex plays many roles in response to DNA double strand breaks (DSBs), but its functions in repair by non homologous end joining (NHEJ) pathways are poorly understood. We have investigated requirements for MRN in Class Switch Recombination (CSR), a programmed DNA rearrangement in B lymphocytes that requires NHEJ. To this end we have engineered mice that lack the entire MRN complex in B lymphocytes, or possess an intact complex harboring mutant Mre11 lacking DNA nuclease activities. MRN deficiency confers a striking defect in CSR, impacting both the Classic and Alternative NHEJ pathways. In contrast, absence of Mre11 nuclease activities causes a milder phenotype, revealing a separation of function within the complex. We propose a model in which MRN stabilizes distant breaks and processes DNA termini to facilitate repair by both the Classical and Alternative NHEJ pathways.
DOI: 10.1016/j.molcel.2007.11.001
发表时间: 2007-11-30
期刊: MOLECULAR CELL
影响因子: 16
作者:
Lengsfeld, Bettina M.;Rattray, Alison J.;Paull, Tanya T.
通讯作者: Paull, Tanya T.
DOI: 10.1038/ni1067
发表时间: 2004-05-01
期刊: NATURE IMMUNOLOGY
影响因子: 30.5
作者:
Manis, JP;Morales, JC;Carpenter, PB
通讯作者: Carpenter, PB
DOI: 10.1016/j.cell.2008.08.015
发表时间: 2008-10-03
期刊: Cell
影响因子: 64.5
作者:
Buis J;Wu Y;Deng Y;Leddon J;Westfield G;Eckersdorff M;Sekiguchi JM;Chang S;Ferguson DO
通讯作者: Ferguson DO
DOI: 10.1016/j.molcel.2009.03.009
发表时间: 2009-04-10
期刊: MOLECULAR CELL
影响因子: 16
作者:
Deriano, Ludovic;Stracker, Travis H.;Baker, Annalee;Petrini, John H. J.;Roth, David B.
通讯作者: Roth, David B.
DOI: 10.1016/j.molcel.2005.11.025
发表时间: 2006-01-20
期刊: MOLECULAR CELL
影响因子: 16
作者:
Lou, ZK;Minter-Dykhouse, K;Chen, JJ
通讯作者: Chen, JJ