Structural basis for activation of DNMT1.
Structural basis for activation of DNMT1.
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DOI:
10.1038/s41467-022-34779-4
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发表时间:
2022-11-21
影响因子:
16.6
通讯作者:
Arita, Kyohei
中科院分区:
文献类型:
--
作者:
Kikuchi, Amika;Onoda, Hiroki;Yamaguchi, Kosuke;Kori, Satomi;Matsuzawa, Shun;Chiba, Yoshie;Tanimoto, Shota;Yoshimi, Sae;Sato, Hiroki;Yamagata, Atsushi;Shirouzu, Mikako;Adachi, Naruhiko;Sharif, Jafar;Koseki, Haruhiko;Nishiyama, Atsuya;Nakanishi, Makoto;Defossez, Pierre-Antoine;Arita, Kyohei
DNMT1 is an essential enzyme that maintains genomic DNA methylation, and its function is regulated by mechanisms that are not yet fully understood. Here, we report the cryo-EM structure of human DNMT1 bound to its two natural activators: hemimethylated DNA and ubiquitinated histone H3. We find that a hitherto unstudied linker, between the RFTS and CXXC domains, plays a key role for activation. It contains a conserved α-helix which engages a crucial “Toggle” pocket, displacing a previously described inhibitory linker, and allowing the DNA Recognition Helix to spring into the active conformation. This is accompanied by large-scale reorganization of the inhibitory RFTS and CXXC domains, allowing the enzyme to gain full activity. Our results therefore provide a mechanistic basis for the activation of DNMT1, with consequences for basic research and drug design. DNMT1 is an essential for maintaining genomic DNA methylation. Here, we report the cryo-EM structure of DNMT1 bound to ubiquitinated H3 and hemimethylated DNA, revealing structural insight into the activation mechanism of DNMT1.
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影响因子:
14.9
作者:
Petryk N;Bultmann S;Bartke T;Defossez PA
通讯作者:
Defossez PA
影响因子:
56.9
作者:
Bostick, Magnolia;Kim, Jong Kyong;Jacobsen, Steven E.
通讯作者:
Jacobsen, Steven E.
影响因子:
3
作者:
Mastronarde, DN
通讯作者:
Mastronarde, DN
影响因子:
6.1
作者:
Orthaber, D;Bergmann, A;Glatter, O
通讯作者:
Glatter, O
影响因子:
16.6
作者:
Gao, Linfeng;Emperle, Max;Song, Jikui
通讯作者:
Song, Jikui