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基本情報
登録情報 | データベース: PDB / ID: 7u20 | ||||||||||||
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タイトル | Crystal structure of human METTL1 and WDR4 complex | ||||||||||||
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![]() | TRANSFERASE / METTL1 WDR4 tRNA methyltransferase | ||||||||||||
機能・相同性 | ![]() internal mRNA (guanine-N7-)-methyltransferase activity / tRNA (m7G46) methyltransferase complex / tRNA (guanine-N7)-methylation / tRNA stabilization / RNA (guanine-N7)-methylation / tRNA (guanine46-N7)-methyltransferase / tRNA (guanine(46)-N7)-methyltransferase activity / tRNA methyltransferase activator activity / tRNA methyltransferase complex / tRNA modification in the nucleus and cytosol ...internal mRNA (guanine-N7-)-methyltransferase activity / tRNA (m7G46) methyltransferase complex / tRNA (guanine-N7)-methylation / tRNA stabilization / RNA (guanine-N7)-methylation / tRNA (guanine46-N7)-methyltransferase / tRNA (guanine(46)-N7)-methyltransferase activity / tRNA methyltransferase activator activity / tRNA methyltransferase complex / tRNA modification in the nucleus and cytosol / tRNA modification / tRNA methylation / cellular response to stress / 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 / enzyme activator activity / chromosome / tRNA binding / DNA damage response / nucleolus / nucleoplasm / nucleus / cytosol 類似検索 - 分子機能 | ||||||||||||
生物種 | ![]() | ||||||||||||
手法 | ![]() ![]() ![]() | ||||||||||||
![]() | Li, J. / Nowak, R.P. / Fischer, E.S. / Gregory, R. | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis of regulated mG tRNA modification by METTL1-WDR4. 著者: Jiazhi Li / Longfei Wang / Quentin Hahn / Radosław P Nowak / Thibault Viennet / Esteban A Orellana / Shourya S Roy Burman / Hong Yue / Moritz Hunkeler / Pietro Fontana / Hao Wu / Haribabu ...著者: Jiazhi Li / Longfei Wang / Quentin Hahn / Radosław P Nowak / Thibault Viennet / Esteban A Orellana / Shourya S Roy Burman / Hong Yue / Moritz Hunkeler / Pietro Fontana / Hao Wu / Haribabu Arthanari / Eric S Fischer / Richard I Gregory / ![]() ![]() 要旨: Chemical modifications of RNA have key roles in many biological processes. N-methylguanosine (mG) is required for integrity and stability of a large subset of tRNAs. The methyltransferase 1-WD repeat- ...Chemical modifications of RNA have key roles in many biological processes. N-methylguanosine (mG) is required for integrity and stability of a large subset of tRNAs. The methyltransferase 1-WD repeat-containing protein 4 (METTL1-WDR4) complex is the methyltransferase that modifies G46 in the variable loop of certain tRNAs, and its dysregulation drives tumorigenesis in numerous cancer types. Mutations in WDR4 cause human developmental phenotypes including microcephaly. How METTL1-WDR4 modifies tRNA substrates and is regulated remains elusive. Here we show, through structural, biochemical and cellular studies of human METTL1-WDR4, that WDR4 serves as a scaffold for METTL1 and the tRNA T-arm. Upon tRNA binding, the αC region of METTL1 transforms into a helix, which together with the α6 helix secures both ends of the tRNA variable loop. Unexpectedly, we find that the predicted disordered N-terminal region of METTL1 is part of the catalytic pocket and essential for methyltransferase activity. Furthermore, we reveal that S27 phosphorylation in the METTL1 N-terminal region inhibits methyltransferase activity by locally disrupting the catalytic centre. Our results provide a molecular understanding of tRNA substrate recognition and phosphorylation-mediated regulation of METTL1-WDR4, and reveal the presumed disordered N-terminal region of METTL1 as a nexus of methyltransferase activity. | ||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 144.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 94.2 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 20.1 KB | 表示 | |
CIF形式データ | ![]() | 26.7 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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単位格子 |
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要素
#1: タンパク質 | 分子量: 31516.012 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Residues not visible in the structure have not been modeled. Recombinant protein did not have any affinity tags. 由来: (組換発現) ![]() ![]() ![]() 参照: UniProt: Q9UBP6, tRNA (guanine46-N7)-methyltransferase, 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 | ||||
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#2: タンパク質 | 分子量: 47363.516 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: MGSSHHHHHHSQDPNS is part of the expression tag and a linker. Residues not visible in the structure have not been modeled. 由来: (組換発現) ![]() ![]() ![]() | ||||
#3: 化合物 | #4: 水 | ChemComp-HOH / | 研究の焦点であるリガンドがあるか | Y | |
-実験情報
-実験
実験 | 手法: ![]() |
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試料調製
結晶 | マシュー密度: 3.39 Å3/Da / 溶媒含有率: 63.79 % |
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結晶化 | 温度: 293 K / 手法: 蒸気拡散法, シッティングドロップ法 / pH: 6.5 詳細: 2M (NH4)2SO4, 0.2M K Na Tartrate, 0.1 M Na3 citrate pH 6.5 Temp details: Room temperature |
-データ収集
回折 | 平均測定温度: 100 K / Serial crystal experiment: N | ||||||||||||||||||||||||
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放射光源 | 由来: ![]() ![]() ![]() | ||||||||||||||||||||||||
検出器 | タイプ: DECTRIS EIGER2 X 16M / 検出器: PIXEL / 日付: 2020年12月2日 / 詳細: monochromatros | ||||||||||||||||||||||||
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray | ||||||||||||||||||||||||
放射波長 | 波長: 0.97918 Å / 相対比: 1 | ||||||||||||||||||||||||
反射 | 解像度: 3.09→47.87 Å / Num. obs: 19262 / % possible obs: 99 % / 冗長度: 4.6 % / Biso Wilson estimate: 85.6 Å2 / Rmerge(I) obs: 0.308 / Rpim(I) all: 0.214 / Rrim(I) all: 0.377 / Net I/σ(I): 5.1 | ||||||||||||||||||||||||
反射 シェル | Diffraction-ID: 1
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解析
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精密化 | 構造決定の手法: ![]() 開始モデル: 3CKK for METTL1, chain D of 2VDU for WDR4 解像度: 3.1→47.87 Å / SU ML: 0.4274 / 交差検証法: FREE R-VALUE / σ(F): 1.34 / 位相誤差: 28.9413 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2
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溶媒の処理 | 減衰半径: 0.9 Å / VDWプローブ半径: 1.1 Å / 溶媒モデル: FLAT BULK SOLVENT MODEL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 75.05 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 解像度: 3.1→47.87 Å
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拘束条件 |
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LS精密化 シェル |
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