Novel TDP2-ubiquitin interactions and their importance for the repair of topoisomerase II-mediated DNA damage.
Novel TDP2-ubiquitin interactions and their importance for the repair of topoisomerase II-mediated DNA damage.
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DOI:
10.1093/nar/gkw719
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发表时间:
2016-12-01
影响因子:
14.9
通讯作者:
Aihara H
中科院分区:
文献类型:
--
作者:
Rao T;Gao R;Takada S;Al Abo M;Chen X;Walters KJ;Pommier Y;Aihara H
Tyrosyl DNA phosphodiesterase 2 (TDP2) is a multifunctional protein implicated in DNA repair, signal transduction and transcriptional regulation. In its DNA repair role, TDP2 safeguards genome integrity by hydrolyzing 5′-tyrosyl DNA adducts formed by abortive topoisomerase II (Top2) cleavage complexes to allow error-free repair of DNA double-strand breaks, thereby conferring cellular resistance against Top2 poisons. TDP2 consists of a C-terminal catalytic domain responsible for its phosphodiesterase activity, and a functionally uncharacterized N-terminal region. Here, we demonstrate that this N-terminal region contains a ubiquitin (Ub)-associated (UBA) domain capable of binding multiple forms of Ub with distinct modes of interactions and preference for either K48- or K63-linked polyUbs over monoUb. The structure of TDP2 UBA bound to monoUb shows a canonical mode of UBA-Ub interaction. However, the absence of the highly conserved MGF motif and the presence of a fourth α-helix make TDP2 UBA distinct from other known UBAs. Mutations in the TDP2 UBA-Ub binding interface do not affect nuclear import of TDP2, but severely compromise its ability to repair Top2-mediated DNA damage, thus establishing the importance of the TDP2 UBA–Ub interaction in DNA repair. The differential binding to multiple Ub forms could be important for responding to DNA damage signals under different contexts or to support the multi-functionality of TDP2.
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DOI:
10.1073/pnas.1409986111
发表时间:
2014-10-07
影响因子:
11.1
作者:
Koeniger, Christian;Wingert, Ida;Nassal, Michael
通讯作者:
Nassal, Michael
DOI:
10.1007/978-1-61779-474-2_20
发表时间:
2012
期刊:
Methods in molecular biology (Clifton, N.J.)
影响因子:
--
作者:
Chen X;Walters KJ
通讯作者:
Walters KJ
影响因子:
10.5
作者:
Do, Phi M.;Varanasi, Lakshman;Martinez, Luis A.
通讯作者:
Martinez, Luis A.
影响因子:
64.8
作者:
Ledesma, Felipe Cortes;El Khamisy, Sherif F.;Caldecott, Keith W.
通讯作者:
Caldecott, Keith W.
DOI:
10.1107/s0907444998003254
发表时间:
1998-09-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者:
Warren, GL