ZATT (ZNF451)-mediated resolution of topoisomerase 2 DNA-protein cross-links.
ZATT (ZNF451)-mediated resolution of topoisomerase 2 DNA-protein cross-links.
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DOI:
10.1126/science.aam6468
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发表时间:
2017-09-29
期刊:
影响因子:
--
通讯作者:
Williams RS
中科院分区:
文献类型:
--
作者:
Schellenberg MJ;Lieberman JA;Herrero-Ruiz A;Butler LR;Williams JG;Muñoz-Cabello AM;Mueller GA;London RE;Cortés-Ledesma F;Williams RS
Topoisomerase 2 (TOP2) DNA transactions are essential for life, and proceed via formation of the TOP2 cleavage complex (TOP2cc), a covalent enzyme-DNA reaction intermediate that is vulnerable to trapping by potent anticancer TOP2 drugs. How genotoxic TOP2 DNA-protein crosslinks are resolved is unclear. Here, we show that the SUMO ligase ZATT (ZNF451) is a multifunctional DNA repair factor that controls cellular responses to TOP2 damage. ZATT binding to TOP2cc facilitates a proteasome-independent Tyrosyl-DNA phosphodiesterase 2 (TDP2) hydrolase activity on stalled TOP2cc. The ZATT SUMO ligase activity further promotes TDP2 interactions with SUMOylated TOP2, regulating efficient TDP2 recruitment through a "split-SIM" SUMO2 engagement platform. These findings uncover a ZATT–TDP2 catalyzed and SUMO2-modulated pathway for direct resolution of TOP2cc.
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