Structural Insight into Binding of the ZZ Domain of HERC2 to Histone H3 and SUMO1
Structural Insight into Binding of the ZZ Domain of HERC2 to Histone H3 and SUMO1
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DOI:
10.1016/j.str.2020.07.003
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发表时间:
2020-11-03
期刊:
影响因子:
5.7
通讯作者:
Kutateladze, Tatiana G.
中科院分区:
文献类型:
--
作者:
Liu, Jiuyang;Xue, Zhaoyu;Kutateladze, Tatiana G.
Human ubiquitin ligase HERC2, a component of the DNA repair machinery, has been linked to neurological diseases and cancer. Here, we show that the ZZ domain of HERC2 (HERC2(zz)) binds to histone H3 tail and tolerates posttranslational modifications commonly present in H3. The crystal structure of the HERC2(zz):H3 complex provides the molecular basis for this interaction and highlights a critical role of the negatively charged site of HERC2(zz) in capturing of Al of H3. NMR, mutagenesis, and fluorescence data reveal that HERC2(zz) binds to H3 and the N-terminal tail of SUMO1, a previously reported ligand of HERC2(zz), with comparable affinities. Like H3, the N-terminal tail of SUMO1 occupies the same negatively charged site of HERC2(zz) in the crystal structure of the complex, although in contrast to H3 it adopts an alpha-helical conformation. Our data suggest that HERC2(zz) may play a role in mediating the association of HERC2 with chromatin.