TOPBP1 recruits TOP2A to ultra-fine anaphase bridges to aid in their resolution.
TOPBP1 recruits TOP2A to ultra-fine anaphase bridges to aid in their resolution.
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DOI:
10.1038/ncomms7572
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发表时间:
2015-03-12
影响因子:
16.6
通讯作者:
Niedzwiedz, Wojciech
中科院分区:
文献类型:
--
作者:
Broderick, Ronan;Nieminuszczy, Jadwiga;Blackford, Andrew N.;Winczura, Alicja;Niedzwiedz, Wojciech
During mitosis, sister chromatids must be faithfully segregated to ensure that daughter cells receive one copy of each chromosome. However, following replication they often remain entangled. Topoisomerase IIα (TOP2A) has been proposed to resolve such entanglements, but the mechanisms governing TOP2A recruitment to these structures remain poorly understood. Here, we identify TOPBP1 as a novel interactor of TOP2A, and reveal that it is required for TOP2A recruitment to ultra-fine anaphase bridges (UFBs) in mitosis. The C-terminal region of TOPBP1 interacts with TOP2A, and TOPBP1 recruitment to UFBs requires its BRCT domain 5. Depletion of TOPBP1 leads to accumulation of UFBs, the majority of which arise from centromeric loci. Accordingly, expression of a TOPBP1 mutant that is defective in TOP2A binding phenocopies TOP2A depletion. These findings provide new mechanistic insights into how TOP2A promotes resolution of UFBs during mitosis, and highlights a pivotal role for TOPBP1 in this process.
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影响因子:
16
作者:
Gong, Zihua;Kim, Ja-Eun;Leung, Charles Chung Yun;Glover, J. N. Mark;Chen, Junjie
通讯作者:
Chen, Junjie
DOI:
10.1042/cbr20110003
发表时间:
2011
期刊:
Cell biology international reports
影响因子:
--
作者:
Kamaci N;Emnacar T;Karakas N;Arikan G;Tsutsui K;Isik S
通讯作者:
Isik S
影响因子:
21.3
作者:
Chan, Kok Lung;Palmai-Pallag, Timea;Hickson, Ian D.
通讯作者:
Hickson, Ian D.
影响因子:
11.4
作者:
Ke, Yuwen;Huh, Jae-Wan;Warrington, Ross;Li, Bing;Wu, Nan;Leng, Mei;Zhang, Junmei;Ball, Haydn L.;Li, Bing;Yu, Hongtao
通讯作者:
Yu, Hongtao
DOI:
10.1073/pnas.0914605107
发表时间:
2010-07-06
影响因子:
11.1
作者:
Blackford, Andrew N.;Patel, Rakesh N.;Turnell, Andrew S.
通讯作者:
Turnell, Andrew S.