+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-5343 | |||||||||
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タイトル | Molecular architecture of the human VP16-Mediator-RNA polymerase II-TFIIF assembly | |||||||||
マップデータ | none | |||||||||
試料 |
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キーワード | transcription / Mediator / RNA polymerase II / TFIIF / activator | |||||||||
機能・相同性 | 機能・相同性情報 RPB4-RPB7 complex / RNA Polymerase I Transcription Initiation / Processing of Capped Intron-Containing Pre-mRNA / nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / mRNA Capping / RNA polymerase II transcribes snRNA genes / TP53 Regulates Transcription of DNA Repair Genes ...RPB4-RPB7 complex / RNA Polymerase I Transcription Initiation / Processing of Capped Intron-Containing Pre-mRNA / nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / mRNA Capping / RNA polymerase II transcribes snRNA genes / TP53 Regulates Transcription of DNA Repair Genes / termination of RNA polymerase II transcription / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Initiation And Promoter Clearance / RNA-templated transcription / RNA Polymerase II Pre-transcription Events / termination of RNA polymerase III transcription / Formation of TC-NER Pre-Incision Complex / transcription initiation at RNA polymerase III promoter / maintenance of transcriptional fidelity during transcription elongation by RNA polymerase II / termination of RNA polymerase I transcription / RNA Polymerase I Promoter Escape / nucleolar large rRNA transcription by RNA polymerase I / Gap-filling DNA repair synthesis and ligation in TC-NER / transcription by RNA polymerase I / transcription initiation at RNA polymerase I promoter / Estrogen-dependent gene expression / nuclear-transcribed mRNA catabolic process / positive regulation of nuclear-transcribed mRNA poly(A) tail shortening / transcription by RNA polymerase III / RNA polymerase II activity / Dual incision in TC-NER / transcription elongation by RNA polymerase I / transcription-coupled nucleotide-excision repair / tRNA transcription by RNA polymerase III / RNA polymerase I activity / RNA polymerase I complex / RNA polymerase III complex / positive regulation of translational initiation / translesion synthesis / RNA polymerase II, core complex / translation initiation factor binding / DNA-templated transcription initiation / transcription initiation at RNA polymerase II promoter / transcription elongation by RNA polymerase II / P-body / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / cytoplasmic stress granule / mRNA processing / ribosome biogenesis / single-stranded DNA binding / transcription by RNA polymerase II / nucleic acid binding / single-stranded RNA binding / protein dimerization activity / mRNA binding / nucleotide binding / nucleolus / mitochondrion / DNA binding / zinc ion binding / nucleoplasm / nucleus / metal ion binding / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | Homo sapiens (ヒト) | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / ネガティブ染色法 / 解像度: 36.0 Å | |||||||||
データ登録者 | Bernecky C / Grob P / Ebmeier CC / Nogales E / Taatjes DJ | |||||||||
引用 | ジャーナル: PLoS Biol / 年: 2011 タイトル: Molecular architecture of the human Mediator-RNA polymerase II-TFIIF assembly. 著者: Carrie Bernecky / Patricia Grob / Christopher C Ebmeier / Eva Nogales / Dylan J Taatjes / 要旨: The macromolecular assembly required to initiate transcription of protein-coding genes, known as the Pre-Initiation Complex (PIC), consists of multiple protein complexes and is approximately 3.5 MDa ...The macromolecular assembly required to initiate transcription of protein-coding genes, known as the Pre-Initiation Complex (PIC), consists of multiple protein complexes and is approximately 3.5 MDa in size. At the heart of this assembly is the Mediator complex, which helps regulate PIC activity and interacts with the RNA polymerase II (pol II) enzyme. The structure of the human Mediator-pol II interface is not well-characterized, whereas attempts to structurally define the Mediator-pol II interaction in yeast have relied on incomplete assemblies of Mediator and/or pol II and have yielded inconsistent interpretations. We have assembled the complete, 1.9 MDa human Mediator-pol II-TFIIF complex from purified components and have characterized its structural organization using cryo-electron microscopy and single-particle reconstruction techniques. The orientation of pol II within this assembly was determined by crystal structure docking and further validated with projection matching experiments, allowing the structural organization of the entire human PIC to be envisioned. Significantly, pol II orientation within the Mediator-pol II-TFIIF assembly can be reconciled with past studies that determined the location of other PIC components relative to pol II itself. Pol II surfaces required for interacting with TFIIB, TFIIE, and promoter DNA (i.e., the pol II cleft) are exposed within the Mediator-pol II-TFIIF structure; RNA exit is unhindered along the RPB4/7 subunits; upstream and downstream DNA is accessible for binding additional factors; and no major structural re-organization is necessary to accommodate the large, multi-subunit TFIIH or TFIID complexes. The data also reveal how pol II binding excludes Mediator-CDK8 subcomplex interactions and provide a structural basis for Mediator-dependent control of PIC assembly and function. Finally, parallel structural analysis of Mediator-pol II complexes lacking TFIIF reveal that TFIIF plays a key role in stabilizing pol II orientation within the assembly. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_5343.map.gz | 14.8 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-5343-v30.xml emd-5343.xml | 12.3 KB 12.3 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_5343_1.png | 70.4 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-5343 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-5343 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_5343_validation.pdf.gz | 292 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_5343_full_validation.pdf.gz | 291.6 KB | 表示 | |
XML形式データ | emd_5343_validation.xml.gz | 5.5 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-5343 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-5343 | HTTPS FTP |
-関連構造データ
-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 |
-マップ
ファイル | ダウンロード / ファイル: emd_5343.map.gz / 形式: CCP4 / 大きさ: 15.5 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | none | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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: 4.29 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-試料の構成要素
-全体 : Assembly of VP16-bound human Mediator, RNA polymerase II, and TFIIF
全体 | 名称: Assembly of VP16-bound human Mediator, RNA polymerase II, and TFIIF |
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要素 |
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-超分子 #1000: Assembly of VP16-bound human Mediator, RNA polymerase II, and TFIIF
超分子 | 名称: Assembly of VP16-bound human Mediator, RNA polymerase II, and TFIIF タイプ: sample / ID: 1000 / 集合状態: one Mediator complex binds one pol II-TFIIF / Number unique components: 3 |
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分子量 | 理論値: 1.9 MDa |
-分子 #1: core Mediator
分子 | 名称: core Mediator / タイプ: protein_or_peptide / ID: 1 / Name.synonym: Mediator / 詳細: bound to GST-VP16 (residues 411 - 490) / 集合状態: 26 subunit complex / 組換発現: No / データベース: NCBI |
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由来(天然) | 生物種: Homo sapiens (ヒト) / 別称: human / 細胞: HeLa / Organelle: Nucleus |
分子量 | 理論値: 1.2 MDa |
-分子 #2: RNA polymerase II
分子 | 名称: RNA polymerase II / タイプ: protein_or_peptide / ID: 2 / Name.synonym: pol II / 詳細: unphosphorylated / 集合状態: 12-subunit complex / 組換発現: No / データベース: NCBI |
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由来(天然) | 生物種: Homo sapiens (ヒト) / 別称: Human / 細胞: HeLa / Organelle: Nucleus |
分子量 | 理論値: 520 KDa |
-分子 #3: TFIIF
分子 | 名称: TFIIF / タイプ: protein_or_peptide / ID: 3 / Name.synonym: TFIIF / 詳細: RAP74 and RAP30 expressed separately then combined / 集合状態: Dimer / 組換発現: Yes |
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由来(天然) | 生物種: Homo sapiens (ヒト) / 別称: Human |
分子量 | 理論値: 10 KDa |
組換発現 | 生物種: Escherichia coli (大腸菌) |
-実験情報
-構造解析
手法 | ネガティブ染色法, 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 |
-試料調製
緩衝液 | pH: 7.9 詳細: 20 mM HEPES, 0.10 mM EDTA, 150 mM KCl, 0.02% NP-40, 35% glycerol |
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染色 | タイプ: NEGATIVE 詳細: grids with adsorbed protein washed 3x with buffer containing 5% trehalose, 20 mM HEPES, 100 mM KCl, and 0.10 mM EDTA, then subjected to cryo-negative staining in a saturated solution (1.2M) ...詳細: grids with adsorbed protein washed 3x with buffer containing 5% trehalose, 20 mM HEPES, 100 mM KCl, and 0.10 mM EDTA, then subjected to cryo-negative staining in a saturated solution (1.2M) of ammonium molybdate (pH 7.5) |
グリッド | 詳細: thin carbon-coated holey carbon 400 mesh copper grid |
凍結 | 凍結剤: ETHANE / チャンバー内温度: 90 K / 装置: OTHER 手法: blot for 2 seconds, dry for 3 seconds before plunging |
-電子顕微鏡法
顕微鏡 | FEI TECNAI F20 |
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撮影 | カテゴリ: FILM / フィルム・検出器のモデル: KODAK SO-163 FILM / デジタル化 - スキャナー: OTHER / デジタル化 - サンプリング間隔: 12.9 µm / 実像数: 106 / 平均電子線量: 15 e/Å2 / Od range: 1 / ビット/ピクセル: 16 |
電子線 | 加速電圧: 200 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: 2.0 mm / 最大 デフォーカス(公称値): 4.5 µm / 最小 デフォーカス(公称値): 1.0 µm / 倍率(公称値): 29000 |
試料ステージ | 試料ホルダー: side entry / 試料ホルダーモデル: GATAN LIQUID NITROGEN |
実験機器 | モデル: Tecnai F20 / 画像提供: FEI Company |
-画像解析
詳細 | The particles were selected interactively at the computer terminal. |
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CTF補正 | 詳細: each micrograph |
最終 再構成 | アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 36.0 Å / 解像度の算出法: FSC 0.5 CUT-OFF / ソフトウェア - 名称: Spider / 使用した粒子像数: 3146 |