Structural basis for DNMT3A-mediated de novo DNA methylation.
Structural basis for DNMT3A-mediated de novo DNA methylation.
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DOI:
10.1038/nature25477
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发表时间:
2018-02-15
期刊:
影响因子:
64.8
通讯作者:
Song J
中科院分区:
文献类型:
--
作者:
Zhang ZM;Lu R;Wang P;Yu Y;Chen D;Gao L;Liu S;Ji D;Rothbart SB;Wang Y;Wang GG;Song J
DNA methylation by de novo DNA methyltransferases 3A (DNMT3A) and 3B (DNMT3B) is essential for genome regulation and development. Dysregulation of this process is implicated in various diseases, notably cancer. However, the mechanisms underlying DNMT3 substrate recognition and enzymatic specificity remain elusive. Here we report a 2.65-Å crystal structure of the DNMT3A-DNMT3L-DNA complex where two DNMT3A monomers simultaneously attack two CpG dinucleotides, with the target sites separated by fourteen base pairs within the same DNA duplex. The DNMT3A–DNA interaction involves a target recognition domain (TRD), a catalytic loop and DNMT3A homodimeric interface. A TRD residue Arg836 makes crucial contacts with CpG, ensuring DNMT3A enzymatic preference towards CpG sites in cells. Hematological cancer-associated somatic mutations of the substrate-binding residues decrease DNMT3A activity, induce CpG hypomethylation, and promote transformation of hematopoietic cells. Together, our study reveals the mechanistic basis for DNMT3A-mediated DNA methylation and establishes its etiologic link to human disease.
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影响因子:
25
作者:
Guo, Junjie U.;Su, Yijing;Shin, Joo Heon;Shin, Jaehoon;Li, Hongda;Xie, Bin;Zhong, Chun;Hu, Shaohui;Le, Thuc;Fan, Guoping;Zhu, Heng;Chang, Qiang;Gao, Yuan;Ming, Guo-li;Song, Hongjun
通讯作者:
Song, Hongjun
影响因子:
50.3
作者:
Russler-Germain DA;Spencer DH;Young MA;Lamprecht TL;Miller CA;Fulton R;Meyer MR;Erdmann-Gilmore P;Townsend RR;Wilson RK;Ley TJ
通讯作者:
Ley TJ
影响因子:
64.5
作者:
Okano, M;Bell, DW;Li, E
通讯作者:
Li, E
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
5.6
作者:
Gowher, H;Loutchanwoot, P;Jeltsch, A
通讯作者:
Jeltsch, A