Helicase Q promotes homology-driven DNA double-strand break repair and prevents tandem duplications.
Helicase Q promotes homology-driven DNA double-strand break repair and prevents tandem duplications.
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DOI:
10.1038/s41467-021-27408-z
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发表时间:
2021-12-08
影响因子:
16.6
通讯作者:
Tijsterman M
中科院分区:
文献类型:
--
作者:
Kamp JA;Lemmens BBLG;Romeijn RJ;Changoer SC;van Schendel R;Tijsterman M
DNA double-strand breaks are a major threat to cellular survival and genetic integrity. In addition to high fidelity repair, three intrinsically mutagenic DNA break repair routes have been described, i.e. single-strand annealing (SSA), polymerase theta-mediated end-joining (TMEJ) and residual ill-defined microhomology-mediated end-joining (MMEJ) activity. Here, we identify C. elegans Helicase Q (HELQ-1) as being essential for MMEJ as well as for SSA. We also find HELQ-1 to be crucial for the synthesis-dependent strand annealing (SDSA) mode of homologous recombination (HR). Loss of HELQ-1 leads to increased genome instability: patchwork insertions arise at deletion junctions due to abortive rounds of polymerase theta activity, and tandem duplications spontaneously accumulate in genomes of helq-1 mutant animals as a result of TMEJ of abrogated HR intermediates. Our work thus implicates HELQ activity for all DSB repair modes guided by complementary base pairs and provides mechanistic insight into mutational signatures common in HR-defective cancers. Microhomology-mediated end-joining (MMEJ) is a poorly defined mutagenic DNA break repair pathway. Here the authors show that the helicase HELQ is essential for polymerase theta-independent MMEJ, single-strand annealing and homologous recombination through synthesis dependent strand annealing in C. elegans.
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影响因子:
19
作者:
Ceccaldi R;Rondinelli B;D'Andrea AD
通讯作者:
D'Andrea AD
影响因子:
64.8
作者:
Cheng, MY;Bullock, CM;Zhou, QY
通讯作者:
Zhou, QY
DOI:
10.15252/embj.201488663
发表时间:
2014-11-03
期刊:
The EMBO journal
影响因子:
--
作者:
Castillo Bosch P;Segura-Bayona S;Koole W;van Heteren JT;Dewar JM;Tijsterman M;Knipscheer P
通讯作者:
Knipscheer P
影响因子:
10.5
作者:
Hustedt, Nicole;Saito, Yuichiro;Durocher, Daniel
通讯作者:
Durocher, Daniel
影响因子:
16.6
作者:
Chandramouly, Gurushankar;Kwok, Amy;Huang, Bin;Willis, Nicholas A.;Xie, Anyong;Scully, Ralph
通讯作者:
Scully, Ralph