- EMDB-28156: Cryo-EM structure of human DNMT3B homo-tetramer (form I) -
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基本情報
登録情報
データベース: EMDB / ID: EMD-28156
タイトル
Cryo-EM structure of human DNMT3B homo-tetramer (form I)
マップデータ
Sharpened map
試料
複合体: DNA (cytosine-5)-methyltransferase 3B
タンパク質・ペプチド: DNA (cytosine-5)-methyltransferase 3B
リガンド: S-ADENOSYL-L-HOMOCYSTEINE
リガンド: ZINC ION
キーワード
DNA methyltransferase / TRANSFERASE
機能・相同性
機能・相同性情報
DNA (cytosine-5-)-methyltransferase activity, acting on CpG substrates / DNA-methyltransferase activity / DNA (cytosine-5-)-methyltransferase activity / DNA (cytosine-5-)-methyltransferase activity, acting on CpN substrates / DNA (cytosine-5-)-methyltransferase activity, acting on CpNpG substrates / DNA (cytosine-5-)-methyltransferase / SUMOylation of DNA methylation proteins / catalytic complex / DNA methylation / PRC2 methylates histones and DNA ...DNA (cytosine-5-)-methyltransferase activity, acting on CpG substrates / DNA-methyltransferase activity / DNA (cytosine-5-)-methyltransferase activity / DNA (cytosine-5-)-methyltransferase activity, acting on CpN substrates / DNA (cytosine-5-)-methyltransferase activity, acting on CpNpG substrates / DNA (cytosine-5-)-methyltransferase / SUMOylation of DNA methylation proteins / catalytic complex / DNA methylation / PRC2 methylates histones and DNA / Defective pyroptosis / NoRC negatively regulates rRNA expression / transcription corepressor activity / methylation / positive regulation of gene expression / negative regulation of transcription by RNA polymerase II / DNA binding / zinc ion binding / nucleoplasm / nucleus 類似検索 - 分子機能
DNA (cytosine-5)-methyltransferase 3B, ADD domain / DNMT3, cysteine rich ADD domain / : / DNMT3, cysteine rich ADD domain, GATA1-like zinc finger / DNMT3, ADD PHD zinc finger / ADD domain / ADD domain profile. / DNA methylase, C-5 cytosine-specific, active site / C-5 cytosine-specific DNA methylases active site. / C-5 cytosine-specific DNA methylase (Dnmt) domain profile. ...DNA (cytosine-5)-methyltransferase 3B, ADD domain / DNMT3, cysteine rich ADD domain / : / DNMT3, cysteine rich ADD domain, GATA1-like zinc finger / DNMT3, ADD PHD zinc finger / ADD domain / ADD domain profile. / DNA methylase, C-5 cytosine-specific, active site / C-5 cytosine-specific DNA methylases active site. / C-5 cytosine-specific DNA methylase (Dnmt) domain profile. / C-5 cytosine methyltransferase / C-5 cytosine-specific DNA methylase / domain with conserved PWWP motif / PWWP domain / PWWP domain profile. / PWWP domain / Zinc finger, FYVE/PHD-type / S-adenosyl-L-methionine-dependent methyltransferase superfamily 類似検索 - ドメイン・相同性
National Institutes of Health/National Cancer Institute (NIH/NCI)
米国
引用
ジャーナル: Nucleic Acids Res / 年: 2023 タイトル: Structural basis for the allosteric regulation and dynamic assembly of DNMT3B. 著者: Jiuwei Lu / Jian Fang / Hongtao Zhu / Kimberly Lu Liang / Nelli Khudaverdyan / Jikui Song / 要旨: Oligomerization of DNMT3B, a mammalian de novo DNA methyltransferase, critically regulates its chromatin targeting and DNA methylation activities. However, how the N-terminal PWWP and ADD domains ...Oligomerization of DNMT3B, a mammalian de novo DNA methyltransferase, critically regulates its chromatin targeting and DNA methylation activities. However, how the N-terminal PWWP and ADD domains interplay with the C-terminal methyltransferase (MTase) domain in regulating the dynamic assembly of DNMT3B remains unclear. Here, we report the cryo-EM structure of DNMT3B under various oligomerization states. The ADD domain of DNMT3B interacts with the MTase domain to form an autoinhibitory conformation, resembling the previously observed DNMT3A autoinhibition. Our combined structural and biochemical study further identifies a role for the PWWP domain and its associated ICF mutation in the allosteric regulation of DNMT3B tetramer, and a differential functional impact on DNMT3B by potential ADD-H3K4me0 and PWWP-H3K36me3 bindings. In addition, our comparative structural analysis reveals a coupling between DNMT3B oligomerization and folding of its substrate-binding sites. Together, this study provides mechanistic insights into the allosteric regulation and dynamic assembly of DNMT3B.