RNF8- and Ube2S-Dependent Ubiquitin Lysine 11-Linkage Modification in Response to DNA Damage.
RNF8- and Ube2S-Dependent Ubiquitin Lysine 11-Linkage Modification in Response to DNA Damage.
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DOI:
10.1016/j.molcel.2017.04.013
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发表时间:
2017-05-18
期刊:
影响因子:
16
通讯作者:
Wang B
中科院分区:
文献类型:
--
作者:
Paul A;Wang B
Ubiquitin modification of proteins plays pivotal roles in the cellular response to DNA damage. Given the complexity of ubiquitin conjugation due to the formation of poly-conjugates of different linkages, functional roles of linkage-specific ubiquitin modification at DNA damage sites is largely unclear. We identify that Lys11-linkage ubiquitin modification occurs at DNA damage sites in an ATM-dependent manner and ubiquitin modifying enzymes including Ube2S E2 conjugating enzyme, RNF8 E3 ligase and Cezanne dequbiquitinating enzyme are responsible for the assembly and disassembly of Lys11-linkage conjugates on damaged chromatin including histone H2A/H2AX. We show that Lys11-linkage ubiquitin plays an important role in regulating DNA damage-induced transcriptional silencing, distinct from the role of Lys63-linkage ubiquitin in recruitment of DNA damage repair proteins 53BP1 and BRCA1. Thus, our study highlights the importance of linkage-specific ubiquitination at DNA damage sites and reveals that Lys11-linkage ubiquitin modification plays a crucial role in the DNA damage response.
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