The P. furiosus mre11/rad50 complex promotes 5' strand resection at a DNA double-strand break.

The P. furiosus mre11/rad50 complex promotes 5' strand resection at a DNA double-strand break.
复制标题

DOI:
10.1016/j.cell.2008.09.054
复制
发表时间:
2008-10-17
期刊:
影响因子:
64.5
通讯作者:
Paull TT
Paull TT
中科院分区:
生物学1区
文献类型:
--
作者:
Hopkins BB;Paull TT

文献摘要

参考文献

被引文献

相似文献

Mre 11/Rad 50复合物在几种生物体中通过同源重组参与DNA双链断裂(DSB)修复的早期步骤。然而,该复合物的酶性质与用于重组酶加载和链交换的3'单链DNA的产生不相容。在嗜热古菌中,Mre 11和Rad 50基因与编码解旋酶HerA和5'至3'核酸外切酶NurA的基因聚簇在一个操纵子中,表明它们具有共同的功能。在这里,我们表明,纯化的Mre 11和Rad 50从Pyrococcus furiosus与HerA和NurA合作,在体外生理条件下切除DNA末端的5'链。由这些酶产生的3'单链DNA可被古细菌RecA同源物RadA用于催化链交换。这项工作阐明了保守的Mre 11/Rad 50复合物如何促进古细菌中的DNA末端切除,并可作为真核生物中DSB加工的模型。
The Mre11/Rad50 complex has been implicated in the early steps of DNA double-strand break (DSB) repair through homologous recombination in several organisms. However, the enzymatic properties of this complex are incompatible with the generation of 3’ single-stranded DNA for recombinase loading and strand exchange. In thermophilic archaea, the Mre11 and Rad50 genes cluster in an operon with genes encoding a helicase, HerA, and a 5’ to 3’ exonuclease, NurA, suggesting a common function. Here we show that purified Mre11 and Rad50 from Pyrococcus furiosus act cooperatively with HerA and NurA to resect the 5’ strand at a DNA end under physiological conditions in vitro. The 3’ single-stranded DNA generated by these enzymes can be utilized by the archaeal RecA homolog RadA to catalyze strand exchange. This work elucidates how the conserved Mre11/Rad50 complex promotes DNA end resection in archaea, and may serve as a model for DSB processing in eukaryotes.
DOI: 10.1038/sj.emboj.7600469
发表时间: 2004-12-08
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Aylon, Y;Liefshitz, B;Kupiec, M
通讯作者: Kupiec, M
DOI: 10.1038/ncb1337
发表时间: 2006-01-01
影响因子: 21.3
作者:
Jazayeri, A;Falck, J;Jackson, SP
通讯作者: Jackson, SP
DOI: 10.1074/jbc.272.32.19819
发表时间: 1997-08-08
影响因子: 4.8
作者:
Connelly, JC;deLeau, ES;Leach, DRF
通讯作者: Leach, DRF
DOI: 10.1038/sj.embor.7400037
发表时间: 2004-01-01
期刊: EMBO REPORTS
影响因子: 7.7
作者:
Manzan, A;Pfeiffer, G;Hopfner, KP
通讯作者: Hopfner, KP
DOI: 10.1016/j.jmb.2003.11.026
发表时间: 2004-01-23
影响因子: 5.6
作者:
Moncalian, G;Lengsfeld, B;Paull, TT
通讯作者: Paull, TT