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データを開く
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基本情報
| 登録情報 | データベース: EMDB / ID: EMD-2422 | |||||||||
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| タイトル | Molecular architecture of the 80S-eIF5B-Met-itRNAMet Eukaryotic Translation Initiation Complex | |||||||||
マップデータ | Reconstruction of 80S-eIF5B-Met-itRNAMet Eukaryotic Translation Initiation Complex with tRNA in the P/I-site and density for all four domains of eIF5B. | |||||||||
試料 |
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キーワード | Ribosome initiation complex / initiator factor eiF5B / cryo EM / single particle analysis | |||||||||
| 機能・相同性 | 機能・相同性情報triplex DNA binding / Platelet degranulation / ribosome hibernation / translation elongation factor binding / formation of cytoplasmic translation initiation complex / regulation of translational initiation in response to stress / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / eukaryotic 48S preinitiation complex / regulation of amino acid metabolic process / negative regulation of glucose mediated signaling pathway ...triplex DNA binding / Platelet degranulation / ribosome hibernation / translation elongation factor binding / formation of cytoplasmic translation initiation complex / regulation of translational initiation in response to stress / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / eukaryotic 48S preinitiation complex / regulation of amino acid metabolic process / negative regulation of glucose mediated signaling pathway / translational readthrough / positive regulation of translational fidelity / : / RMTs methylate histone arginines / Protein methylation / mTORC1-mediated signalling / Protein hydroxylation / positive regulation of protein kinase activity / ribosome-associated ubiquitin-dependent protein catabolic process / regulation of translational initiation / protein-synthesizing GTPase / pre-mRNA 5'-splice site binding / GDP-dissociation inhibitor activity / cytosolic large ribosomal subunit assembly / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / nonfunctional rRNA decay / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / response to cycloheximide / Ribosomal scanning and start codon recognition / preribosome, small subunit precursor / cleavage in ITS2 between 5.8S rRNA and LSU-rRNA of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Major pathway of rRNA processing in the nucleolus and cytosol / mRNA destabilization / telomeric repeat DNA binding / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / negative regulation of mRNA splicing, via spliceosome / preribosome, large subunit precursor / Formation of a pool of free 40S subunits / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / L13a-mediated translational silencing of Ceruloplasmin expression / negative regulation of translational frameshifting / TOR signaling / translational elongation / ribosomal large subunit export from nucleus / G-protein alpha-subunit binding / 90S preribosome / Ub-specific processing proteases / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal subunit export from nucleus / regulation of translational fidelity / translational termination / protein-RNA complex assembly / maturation of LSU-rRNA / translation regulator activity / endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal small subunit export from nucleus / translation initiation factor binding / translation initiation factor activity / translation repressor activity / DNA-(apurinic or apyrimidinic site) endonuclease activity / rescue of stalled cytosolic ribosome / telomere maintenance / cellular response to amino acid starvation / protein kinase C binding / ribosomal large subunit biogenesis / cytosolic ribosome assembly / ribosome assembly / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / translational initiation / maintenance of translational fidelity / modification-dependent protein catabolic process / cytoplasmic stress granule / protein tag activity / rRNA processing / ribosomal small subunit assembly / ribosome biogenesis / ribosome binding / ribosomal small subunit biogenesis / 5S rRNA binding / small ribosomal subunit / ribosomal large subunit assembly / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / negative regulation of translation / rRNA binding / structural constituent of ribosome / protein ubiquitination / ribosome / translation / G protein-coupled receptor signaling pathway / negative regulation of gene expression 類似検索 - 分子機能 | |||||||||
| 生物種 | ![]() | |||||||||
| 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: 6.6 Å | |||||||||
データ登録者 | Fernandez IS / Bai XC / Hussain T / Kelley AC / Lorsch JR / Ramakrishnan V / Scheres SHW | |||||||||
引用 | ジャーナル: Science / 年: 2013タイトル: Molecular architecture of a eukaryotic translational initiation complex. 著者: Israel S Fernández / Xiao-Chen Bai / Tanweer Hussain / Ann C Kelley / Jon R Lorsch / V Ramakrishnan / Sjors H W Scheres / ![]() 要旨: The last step in eukaryotic translational initiation involves the joining of the large and small subunits of the ribosome, with initiator transfer RNA (Met-tRNA(i)(Met)) positioned over the start ...The last step in eukaryotic translational initiation involves the joining of the large and small subunits of the ribosome, with initiator transfer RNA (Met-tRNA(i)(Met)) positioned over the start codon of messenger RNA in the P site. This step is catalyzed by initiation factor eIF5B. We used recent advances in cryo-electron microscopy (cryo-EM) to determine a structure of the eIF5B initiation complex to 6.6 angstrom resolution from <3% of the population, comprising just 5143 particles. The structure reveals conformational changes in eIF5B, initiator tRNA, and the ribosome that provide insights into the role of eIF5B in translational initiation. The relatively high resolution obtained from such a small fraction of a heterogeneous sample suggests a general approach for characterizing the structure of other dynamic or transient biological complexes. | |||||||||
| 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: SurfView Molmil Jmol/JSmol |
| 添付画像 |
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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_2422.map.gz | 49.3 MB | EMDBマップデータ形式 | |
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| ヘッダ (付随情報) | emd-2422-v30.xml emd-2422.xml | 11.1 KB 11.1 KB | 表示 表示 | EMDBヘッダ |
| 画像 | EMD-2422.jpg | 116.7 KB | ||
| アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-2422 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-2422 | HTTPS FTP |
-関連構造データ
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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_2422.map.gz / 形式: CCP4 / 大きさ: 51.5 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| 注釈 | Reconstruction of 80S-eIF5B-Met-itRNAMet Eukaryotic Translation Initiation Complex with tRNA in the P/I-site and density for all four domains of eIF5B. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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: 1.77 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
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試料の構成要素
-全体 : Reconstruction of 80S-eIF5B-Met-itRNAMet Eukaryotic Translation I...
| 全体 | 名称: Reconstruction of 80S-eIF5B-Met-itRNAMet Eukaryotic Translation Initiation Complex with tRNA in the P/I-site and density for all four domains of eIF5B. |
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| 要素 |
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-超分子 #1000: Reconstruction of 80S-eIF5B-Met-itRNAMet Eukaryotic Translation I...
| 超分子 | 名称: Reconstruction of 80S-eIF5B-Met-itRNAMet Eukaryotic Translation Initiation Complex with tRNA in the P/I-site and density for all four domains of eIF5B. タイプ: sample / ID: 1000 / Number unique components: 2 |
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| 分子量 | 実験値: 4.2 MDa / 理論値: 4.2 MDa |
-超分子 #1: 80S-Met-itRNAMet Eukaryotic Translation Initiation Complex
| 超分子 | 名称: 80S-Met-itRNAMet Eukaryotic Translation Initiation Complex タイプ: complex / ID: 1 / 組換発現: No / Ribosome-details: ribosome-eukaryote: ALL |
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| 由来(天然) | 生物種: ![]() |
| 分子量 | 実験値: 4.2 MDa / 理論値: 4.2 MDa |
-分子 #1: eiF5B
| 分子 | 名称: eiF5B / タイプ: protein_or_peptide / ID: 1 / 組換発現: Yes |
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| 由来(天然) | 生物種: ![]() |
| 組換発現 | 生物種: ![]() |
-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 |
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試料調製
| 濃度 | 0.3 mg/mL |
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| 緩衝液 | pH: 7.2 詳細: 3mM Hepes-KOH, 6.6 mM Tris-acetate pH 7.2, 3 mM NH4Cl, 6.6 mM NH4-acetate, 48 mM K-acetate, 4 mM Mg-acetate, 2.4 mM DTT |
| 染色 | タイプ: NEGATIVE / 詳細: cryo-EM |
| グリッド | 詳細: Quantifoil grids (2/2) with 3 nm thin carbon on top |
| 凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 90 K / 装置: FEI VITROBOT MARK II / 手法: Blot 2.5 seconds before plunging |
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電子顕微鏡法
| 顕微鏡 | FEI POLARA 300 |
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| 温度 | 最低: 80 K / 最高: 90 K / 平均: 85 K |
| アライメント法 | Legacy - 非点収差: Objective lens astigmatism was corrected at 59,000 times magnification |
| 日付 | 2013年1月15日 |
| 撮影 | カテゴリ: CCD フィルム・検出器のモデル: FEI FALCON I (4k x 4k) デジタル化 - サンプリング間隔: 14 µm / 実像数: 1012 / 平均電子線量: 16 e/Å2 詳細: Every image is the average of 16 frames recorded by the direct electron detector |
| 電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
| 電子光学系 | 倍率(補正後): 79096 / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2 mm / 最大 デフォーカス(公称値): 3.9 µm / 最小 デフォーカス(公称値): 1.9 µm / 倍率(公称値): 59000 |
| 試料ステージ | 試料ホルダーモデル: GATAN LIQUID NITROGEN |
| 実験機器 | ![]() モデル: Tecnai Polara / 画像提供: FEI Company |
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画像解析
| 詳細 | Use a newly developed statistical movie processing approach to compensate for beam-induced movement. Use a newly developed statistical movie processing to compensate for beam-induced movement. |
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| CTF補正 | 詳細: Each particle |
| 最終 再構成 | 想定した対称性 - 点群: C1 (非対称) / 解像度のタイプ: BY AUTHOR / 解像度: 6.6 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: CTFFIND3, RELION 詳細: Use a newly developed statistical movie processing approach to compensate for beam-induced movement. 使用した粒子像数: 5143 |
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