DNMT3s are de novo DNA methyltransferases responsible for the establishment of DNA methylation patterns in mammalian genomes [1-4]. The ATRX-DNMT3-DNMT3L (ADD) domain contains two parts, a C2-C2-like zinc finger (Pfam:PF17980) and a PHD-like zinc finger, represented in this entry. In this domain, the conserved His residue observed in classical PHD zinc fingers is replaced by a cysteine.

1: DNMT3L connects unmethylated lysine 4 of histone H3 to de novo methylation of DNA. Ooi SK, Qiu C, Bernstein E, Li K, Jia D, Yang Z, Erdjument-Bromage H, Tempst P, Lin SP, Allis CD, Cheng X, Bestor TH; Nature. 2007;448:714-717. PMID:17687327

2: Structural basis for recognition of H3K4 methylation status by the DNA methyltransferase 3A ATRX-DNMT3-DNMT3L domain. Otani J, Nankumo T, Arita K, Inamoto S, Ariyoshi M, Shirakawa M; EMBO Rep. 2009;10:1235-1241. PMID:19834512

3: Structural insight into autoinhibition and histone H3-induced activation of DNMT3A. Guo X, Wang L, Li J, Ding Z, Xiao J, Yin X, He S, Shi P, Dong L, Li G, Tian C, Wang J, Cong Y, Xu Y; Nature. 2015;517:640-644. PMID:25383530

4: Structure of nucleosome-bound DNA methyltransferases DNMT3A and DNMT3B. Xu TH, Liu M, Zhou XE, Liang G, Zhao G, Xu HE, Melcher K, Jones PA; Nature. 2020;586:151-155. PMID:32968275