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データを開く
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基本情報
| 登録情報 | ![]() | |||||||||
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| タイトル | The cryo-EM structure of nucleosome-bound DNA methyltransferases DNMT3A2 and DNMT3L | |||||||||
マップデータ | Composited map of nucleosome-bound DNA methyltransferases DNMT3A2 and DNMT3L | |||||||||
試料 |
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キーワード | methyltransferase / DNMT-nucleosome complex / TRANSFERASE / TRANSFERASE-DNA complex / DNA BINDING PROTEIN | |||||||||
| 機能・相同性 | 機能・相同性情報epigenetic programing of female pronucleus / chorionic trophoblast cell differentiation / negative regulation of DNA methylation-dependent heterochromatin formation / transposable element silencing by heterochromatin formation / transposable element silencing by piRNA-mediated DNA methylation / positive regulation of cellular response to hypoxia / protein-cysteine methyltransferase activity / regulatory ncRNA-mediated heterochromatin formation / cellular response to bisphenol A / unmethylated CpG binding ...epigenetic programing of female pronucleus / chorionic trophoblast cell differentiation / negative regulation of DNA methylation-dependent heterochromatin formation / transposable element silencing by heterochromatin formation / transposable element silencing by piRNA-mediated DNA methylation / positive regulation of cellular response to hypoxia / protein-cysteine methyltransferase activity / regulatory ncRNA-mediated heterochromatin formation / cellular response to bisphenol A / unmethylated CpG binding / DNA (cytosine-5-)-methyltransferase / genomic imprinting / DNA (cytosine-5-)-methyltransferase activity / autosome genomic imprinting / ESC/E(Z) complex / SUMOylation of DNA methylation proteins / XY body / oocyte development / response to vitamin A / DNA methylation-dependent constitutive heterochromatin formation / response to ionizing radiation / negative regulation of gene expression, epigenetic / hepatocyte apoptotic process / negative regulation of gene expression via chromosomal CpG island methylation / lncRNA binding / male meiosis I / chromosome, centromeric region / cellular response to ethanol / catalytic complex / heterochromatin / 転移酵素; 一炭素原子の基を移すもの; メチル基を移すもの / placenta development / DNA methylation / condensed nuclear chromosome / stem cell differentiation / PRC2 methylates histones and DNA / post-embryonic development / Defective pyroptosis / response to cocaine / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / cellular response to amino acid stimulus / euchromatin / response to lead ion / response to toxic substance / enzyme activator activity / RMTs methylate histone arginines / neuron differentiation / nuclear matrix / structural constituent of chromatin / transcription corepressor activity / response to estradiol / nucleosome / heterochromatin formation / nucleosome assembly / methylation / spermatogenesis / cellular response to hypoxia / RNA polymerase II-specific DNA-binding transcription factor binding / RNA polymerase II cis-regulatory region sequence-specific DNA binding / response to xenobiotic stimulus / protein heterodimerization activity / negative regulation of DNA-templated transcription / chromatin binding / enzyme binding / negative regulation of transcription by RNA polymerase II / DNA binding / zinc ion binding / nucleoplasm / identical protein binding / nucleus / cytoplasm / cytosol 類似検索 - 分子機能 | |||||||||
| 生物種 | Homo sapiens (ヒト) / synthetic construct (人工物) | |||||||||
| 手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.1 Å | |||||||||
データ登録者 | Yan Y / Zhou XE / Xu TH | |||||||||
| 資金援助 | 米国, 2件
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引用 | ジャーナル: Nat Struct Mol Biol / 年: 2026タイトル: Mechanisms of DNMT3A-3L-mediated de novo DNA methylation on chromatin. 著者: Yan Yan / X Edward Zhou / Stacey L Thomas / Minmin Liu / Gan-Qiang Lai / Evan J Worden / Peter A Jones / Ting-Hai Xu / ![]() 要旨: De novo DNA methylation is mediated by DNA methyltransferases DNMT3A and DNMT3B, in cooperation with the catalytically inactive paralogs DNMT3L and DNMT3B3. DNMT3L is predominantly expressed in ...De novo DNA methylation is mediated by DNA methyltransferases DNMT3A and DNMT3B, in cooperation with the catalytically inactive paralogs DNMT3L and DNMT3B3. DNMT3L is predominantly expressed in embryonic stem cells to establish methylation patterns and is silenced upon differentiation, with DNMT3B3 substituting in somatic cells. Here we present high-resolution cryo-electron microscopy structures of nucleosome-bound, full-length DNMT3A2-3L and its oligomeric assemblies in the nucleosome-free state. We identified the critical role of DNMT3L as a histone modification sensor, guiding chromatin engagement through a mechanism distinct from DNMT3B3. The structures show a 180° rotated 'switching helix' in DNMT3L that prevents direct interaction with the nucleosome acidic patch. Instead, nucleosome binding is mediated by the DNMT3L ADD domain, while the DNMT3A PWWP domain exhibits reduced engagement in the absence of H3K36 methylation. The oligomeric arrangement of DNMT3A2-3L in nucleosome-free states highlights its dynamic assembly and potential allosteric regulation. We further capture dynamic structural movements of DNMT3A2-3L on nucleosomes. These findings uncover a previously unknown mechanism by which DNMT3A-3L mediates de novo DNA methylation on chromatin through complex assembly, histone tail sensing, dynamic DNA search and regulated nucleosome engagement, providing insights into epigenetic regulation. | |||||||||
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構造の表示
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ダウンロードとリンク
-EMDBアーカイブ
| マップデータ | emd_48498.map.gz | 5.3 MB | EMDBマップデータ形式 | |
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| ヘッダ (付随情報) | emd-48498-v30.xml emd-48498.xml | 34.3 KB 34.3 KB | 表示 表示 | EMDBヘッダ |
| 画像 | emd_48498.png | 120.7 KB | ||
| Filedesc metadata | emd-48498.cif.gz | 8.5 KB | ||
| アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-48498 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-48498 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 9mppMC ![]() 9mp0C ![]() 9mpoC C: 同じ文献を引用 ( M: このマップから作成された原子モデル |
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| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
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リンク
| EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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| 「今月の分子」の関連する項目 |
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マップ
| ファイル | ダウンロード / ファイル: emd_48498.map.gz / 形式: CCP4 / 大きさ: 244.1 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| 注釈 | Composited map of nucleosome-bound DNA methyltransferases DNMT3A2 and DNMT3L | ||||||||||||||||||||||||||||||||||||
| 投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
| ボクセルのサイズ | X=Y=Z: 0.828 Å | ||||||||||||||||||||||||||||||||||||
| 密度 |
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| 対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
| 詳細 | EMDB XML:
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-添付データ
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試料の構成要素
+全体 : Nucleosome-bound DNA methyltransferases DNMT3A2 and DNMT3L
+超分子 #1: Nucleosome-bound DNA methyltransferases DNMT3A2 and DNMT3L
+超分子 #2: Nucleosome
+超分子 #3: human DNA methyltransferase 3A2 and 3L complex
+分子 #1: Histone H3.2
+分子 #2: Histone H4
+分子 #3: Histone H2A type 1
+分子 #4: Histone H2B 1.1
+分子 #7: DNA (cytosine-5)-methyltransferase 3A
+分子 #8: DNA (cytosine-5)-methyltransferase 3-like
+分子 #5: DNA (167-MER)
+分子 #6: DNA (167-MER)
+分子 #9: ZINC ION
+分子 #10: S-ADENOSYL-L-HOMOCYSTEINE
-実験情報
-構造解析
| 手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
| 試料の集合状態 | particle |
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試料調製
| 濃度 | 0.2 mg/mL |
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| 緩衝液 | pH: 8 |
| グリッド | モデル: Quantifoil R1.2/1.3 / 材質: GOLD / メッシュ: 300 / 前処理 - タイプ: GLOW DISCHARGE / 前処理 - 時間: 30 sec. |
| 凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
| 顕微鏡 | TFS KRIOS |
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| 撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 検出モード: SUPER-RESOLUTION / 撮影したグリッド数: 3 / 実像数: 31987 / 平均電子線量: 60.0 e/Å2 |
| 電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
| 電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.7 mm / 最大 デフォーカス(公称値): 3.0 µm / 最小 デフォーカス(公称値): 1.0 µm |
| 試料ステージ | ホルダー冷却材: NITROGEN |
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
-原子モデル構築 1
| 初期モデル |
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| 精密化 | 空間: REAL / プロトコル: RIGID BODY FIT | ||||||||
| 得られたモデル | ![]() PDB-9mpp: |
ムービー
コントローラー
万見について




キーワード
Homo sapiens (ヒト)
データ登録者
米国, 2件
引用












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