Tetrameric Ctp1 coordinates DNA binding and DNA bridging in DNA double-strand-break repair.

Tetrameric Ctp1 coordinates DNA binding and DNA bridging in DNA double-strand-break repair.
复制标题

DOI:
10.1038/nsmb.2945
复制
发表时间:
2015-02
影响因子:
16.8
通讯作者:
Williams, R. Scott
Williams, R. Scott
中科院分区:
生物学1区
文献类型:
--
作者:
Andres, Sara N.;Appel, C. Denise;Westmoreland, James W.;Williams, Jessica S.;Nguyen, Yvonne;Robertson, Patrick D.;Resnick, Michael A.;Williams, R. Scott

文献摘要

参考文献

被引文献

相似文献

Ctp1(又名CtIP或Sae2)与Mre11-Rad50-Nbs1协同启动DNA双链断裂(DSBs)的修复,但其功能仍是谜。我们报道四聚体Schizosaccharomyces pombe Ctp1具有多价dna结合和桥接活性。通过对Ctp1四聚体的结构和生物物理分析,我们定义了Ctp1结构的显著特征:一个n端互锁四聚体螺旋二聚体(THDD)结构域和一个连接c端“RHR”DNA相互作用基序的中心内在无序区(IDR)。THDD, IDR和RHR是体外Ctp1 DNA桥接活性所必需的,THDD和RHR是pombe中有效修复DSB所必需的。我们的研究结果确定了Ctp1在DSB修复中间体的结合和协调中的非溶核作用,并表明通过截断突变来消融人类CtIP DNA结合是CtIP相关的Seckel和Jawad综合征的基础。
Ctp1 (aka CtIP or Sae2) collaborates with Mre11–Rad50–Nbs1 to initiate repair of DNA double strand breaks (DSBs), but its function(s) remain enigmatic. We report that tetrameric Schizosaccharomyces pombe Ctp1 harbors multivalent DNA-binding and bridging activities. Through structural and biophysical analyses of the Ctp1 tetramer we define the salient features of Ctp1 architecture: an N-terminal interlocking tetrameric helical dimer-of-dimers (THDD) domain and a central intrinsically disordered region (IDR) linked to C-terminal “RHR” DNA interaction motifs. The THDD, IDR and RHR are required for Ctp1 DNA bridging activity in vitro and both the THDD and RHR are required for efficient DSB repair in S. pombe. Our results establish non-nucleolytic roles for Ctp1 in binding and coordination of DSB repair intermediates and suggest that ablation of human CtIP DNA binding by truncating mutations underlie the CTIP-linked Seckel and Jawad syndromes.
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/nature03927
发表时间: 2005-09-15
期刊: NATURE
影响因子: 64.8
作者:
Moreno-Herrero, F;de Jager, M;Dekker, C
通讯作者: Dekker, C
DOI: 10.1093/bioinformatics/bti541
发表时间: 2005-08-15
期刊: BIOINFORMATICS
影响因子: 5.8
作者:
Dosztányi, Z;Csizmok, V;Simon, I
通讯作者: Simon, I
人CTIP介导DNA终端切除和双链断裂修复的细胞周期控制。
DOI: 10.1074/jbc.m808906200
发表时间: 2009-04-03
期刊: The Journal of biological chemistry
影响因子: --
作者:
Huertas P;Jackson SP
通讯作者: Jackson SP
DOI: 10.1038/nature03872
发表时间: 2005-08-18
期刊: NATURE
影响因子: 64.8
作者:
Neale, MJ;Pan, J;Keeney, S
通讯作者: Keeney, S