Multifaceted role of the Topo IIIα-RMI1-RMI2 complex and DNA2 in the BLM-dependent pathway of DNA break end resection.
Multifaceted role of the Topo IIIα-RMI1-RMI2 complex and DNA2 in the BLM-dependent pathway of DNA break end resection.
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DOI:
10.1093/nar/gku803
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发表时间:
2014
影响因子:
14.9
通讯作者:
Sung P
中科院分区:
文献类型:
--
作者:
Daley JM;Chiba T;Xue X;Niu H;Sung P
BLM, a RecQ family DNA helicase mutated in Bloom's Syndrome, participates in homologous recombination at two stages: 5′ DNA end resection and double Holliday junction dissolution. BLM exists in a complex with Topo IIIα, RMI1 and RMI2. Herein, we address the role of Topo IIIα and RMI1-RMI2 in resection using a reconstituted system with purified human proteins. We show that Topo IIIα stimulates DNA unwinding by BLM in a manner that is potentiated by RMI1-RMI2, and that the processivity of resection is reliant on the Topo IIIα–RMI1-RMI2 complex. Topo IIIα localizes to the ends of double-strand breaks, thus implicating it in the recruitment of resection factors. While the single-stranded DNA binding protein RPA plays a major role in imposing the 5′ to 3′ polarity of resection, Topo IIIα also makes a contribution in this regard. Moreover, we show that DNA2 stimulates the helicase activity of BLM. Our results thus uncover a multifaceted role of the Topo IIIα–RMI1-RMI2 ensemble and of DNA2 in the DNA resection reaction.
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影响因子:
4.8
作者:
Lyubchenko, Yuri L.;Shlyakhtenko, Luda S.
通讯作者:
Shlyakhtenko, Luda S.
影响因子:
64.8
作者:
Moreno-Herrero, F;de Jager, M;Dekker, C
通讯作者:
Dekker, C
影响因子:
14.9
作者:
Orren, DK;Brosh, RM;Bohr, VA
通讯作者:
Bohr, VA
DOI:
10.1007/978-1-60327-015-1_21
发表时间:
2009-01-01
期刊:
DNA-PROTEIN INTERACTIONS: PRINCIPLES AND PROTOCOLS, THIRD EDITION
影响因子:
--
作者:
Lyubchenko, Yuri L.;Shlyakhtenko, Luda S.;Gall, Alexander A.
通讯作者:
Gall, Alexander A.
DOI:
10.1073/pnas.0809380105
发表时间:
2008-11-04
影响因子:
11.1
作者:
Nimonkar, Almitabh V.;Ozsoy, A. Zeynep;Kowalczykowski, Stephen C.
通讯作者:
Kowalczykowski, Stephen C.