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-Structure paper
タイトル | Structural basis for the allosteric regulation and dynamic assembly of DNMT3B. |
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ジャーナル・号・ページ | Nucleic Acids Res, Vol. 51, Issue 22, Page 12476-12491, Year 2023 |
掲載日 | 2023年12月11日 |
著者 | Jiuwei Lu / Jian Fang / Hongtao Zhu / Kimberly Lu Liang / Nelli Khudaverdyan / Jikui Song / |
PubMed 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. |
リンク | Nucleic Acids Res / PubMed:37941146 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.04 - 3.34 Å |
構造データ | EMDB-28156, PDB-8eih: EMDB-28157, PDB-8eii: EMDB-28158, PDB-8eij: EMDB-28159, PDB-8eik: |
化合物 | ChemComp-SAH: ChemComp-ZN: |
由来 |
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キーワード | TRANSFERASE / DNA methyltransferase |