+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-10772 | ||||||||||||
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タイトル | Structure of a human 48S translational initiation complex - head | ||||||||||||
マップデータ | |||||||||||||
試料 |
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キーワード | ribosome (リボソーム) / translation (翻訳 (生物学)) / initiation complex (イニシエーション) | ||||||||||||
機能・相同性 | 機能・相同性情報 positive regulation of mRNA binding / viral translational termination-reinitiation / cap-dependent translational initiation / eukaryotic translation initiation factor 3 complex, eIF3m / IRES-dependent viral translational initiation / eukaryotic translation initiation factor 3 complex / eukaryotic 43S preinitiation complex / mRNA cap binding / formation of cytoplasmic translation initiation complex / positive regulation of cysteine-type endopeptidase activity involved in execution phase of apoptosis ...positive regulation of mRNA binding / viral translational termination-reinitiation / cap-dependent translational initiation / eukaryotic translation initiation factor 3 complex, eIF3m / IRES-dependent viral translational initiation / eukaryotic translation initiation factor 3 complex / eukaryotic 43S preinitiation complex / mRNA cap binding / formation of cytoplasmic translation initiation complex / positive regulation of cysteine-type endopeptidase activity involved in execution phase of apoptosis / negative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / protein tyrosine kinase inhibitor activity / eukaryotic 48S preinitiation complex / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of respiratory burst involved in inflammatory response / positive regulation of gastrulation / IRE1-RACK1-PP2A complex / nucleolus organization / : / positive regulation of endodeoxyribonuclease activity / positive regulation of Golgi to plasma membrane protein transport / TNFR1-mediated ceramide production / negative regulation of DNA repair / oxidized purine DNA binding / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / supercoiled DNA binding / negative regulation of phagocytosis / NF-kappaB complex / ubiquitin-like protein conjugating enzyme binding / regulation of establishment of cell polarity / Formation of the ternary complex, and subsequently, the 43S complex / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / positive regulation of signal transduction by p53 class mediator / ubiquitin ligase inhibitor activity / 顔料 / protein kinase A binding / Ribosomal scanning and start codon recognition / ion channel inhibitor activity / Translation initiation complex formation / phagocytic cup / positive regulation of mitochondrial depolarization / negative regulation of Wnt signaling pathway / positive regulation of T cell receptor signaling pathway / positive regulation of activated T cell proliferation / fibroblast growth factor binding / regulation of cell division / SARS-CoV-1 modulates host translation machinery / iron-sulfur cluster binding / BH3 domain binding / Peptide chain elongation / Selenocysteine synthesis / monocyte chemotaxis / cysteine-type endopeptidase activator activity involved in apoptotic process / Formation of a pool of free 40S subunits / ribosomal small subunit export from nucleus / positive regulation of cyclic-nucleotide phosphodiesterase activity / Eukaryotic Translation Termination / Response of EIF2AK4 (GCN2) to amino acid deficiency / translation regulator activity / SRP-dependent cotranslational protein targeting to membrane / Viral mRNA Translation / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / negative regulation of respiratory burst involved in inflammatory response / negative regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / L13a-mediated translational silencing of Ceruloplasmin expression / Major pathway of rRNA processing in the nucleolus and cytosol / gastrulation / spindle assembly / regulation of translational fidelity / MDM2/MDM4 family protein binding / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / negative regulation of smoothened signaling pathway / rescue of stalled ribosome / signaling adaptor activity / negative regulation of peptidyl-serine phosphorylation / maturation of SSU-rRNA / positive regulation of intrinsic apoptotic signaling pathway / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / class I DNA-(apurinic or apyrimidinic site) endonuclease activity / positive regulation of apoptotic signaling pathway / Maturation of protein E / positive regulation of microtubule polymerization / Maturation of protein E / positive regulation of JUN kinase activity / ER Quality Control Compartment (ERQC) / negative regulation of protein ubiquitination / translational initiation / Myoclonic epilepsy of Lafora / FLT3 signaling by CBL mutants / DNA-(apurinic or apyrimidinic site) endonuclease activity / Prevention of phagosomal-lysosomal fusion / IRAK2 mediated activation of TAK1 complex / Alpha-protein kinase 1 signaling pathway / グリコーゲン合成 / IRAK1 recruits IKK complex 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 / 解像度: 3.1 Å | ||||||||||||
データ登録者 | Brito Querido J / Sokabe M | ||||||||||||
資金援助 | 英国, 米国, 3件
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引用 | ジャーナル: Science / 年: 2020 タイトル: Structure of a human 48 translational initiation complex. 著者: Jailson Brito Querido / Masaaki Sokabe / Sebastian Kraatz / Yuliya Gordiyenko / J Mark Skehel / Christopher S Fraser / V Ramakrishnan / 要旨: A key step in translational initiation is the recruitment of the 43 preinitiation complex by the cap-binding complex [eukaryotic initiation factor 4F (eIF4F)] at the 5' end of messenger RNA (mRNA) to ...A key step in translational initiation is the recruitment of the 43 preinitiation complex by the cap-binding complex [eukaryotic initiation factor 4F (eIF4F)] at the 5' end of messenger RNA (mRNA) to form the 48 initiation complex (i.e., the 48). The 48 then scans along the mRNA to locate a start codon. To understand the mechanisms involved, we used cryo-electron microscopy to determine the structure of a reconstituted human 48 The structure reveals insights into early events of translation initiation complex assembly, as well as how eIF4F interacts with subunits of eIF3 near the mRNA exit channel in the 43 The location of eIF4F is consistent with a slotting model of mRNA recruitment and suggests that downstream mRNA is unwound at least in part by being "pulled" through the 40 subunit during scanning. | ||||||||||||
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_10772.map.gz | 27.7 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-10772-v30.xml emd-10772.xml | 37.6 KB 37.6 KB | 表示 表示 | EMDBヘッダ |
FSC (解像度算出) | emd_10772_fsc.xml | 17.7 KB | 表示 | FSCデータファイル |
画像 | emd_10772.png | 168.4 KB | ||
マスクデータ | emd_10772_msk_1.map | 476.8 MB | マスクマップ | |
Filedesc metadata | emd-10772.cif.gz | 9.2 KB | ||
その他 | emd_10772_additional_1.map.gz emd_10772_additional_2.map.gz emd_10772_half_map_1.map.gz emd_10772_half_map_2.map.gz | 382 MB 394.2 MB 394.6 MB 394.5 MB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-10772 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-10772 | 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_10772.map.gz / 形式: CCP4 / 大きさ: 476.8 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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ボクセルのサイズ | X=Y=Z: 1.074 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
-マスク #1
ファイル | emd_10772_msk_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-追加マップ: #1
ファイル | emd_10772_additional_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-追加マップ: #2
ファイル | emd_10772_additional_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_10772_half_map_1.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: #2
ファイル | emd_10772_half_map_2.map | ||||||||||||
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投影像・断面図 |
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密度ヒストグラム |
-試料の構成要素
+全体 : 48S initiation complex
+超分子 #1: 48S initiation complex
+分子 #1: Eukaryotic translation initiation factor 3 subunit D
+分子 #2: Receptor of activated protein C kinase 1
+分子 #3: 40S ribosomal protein S28
+分子 #4: 40S ribosomal protein S17
+分子 #5: 40S ribosomal protein S20
+分子 #6: Eukaryotic translation initiation factor 3 subunit G
+分子 #7: 40S ribosomal protein S10
+分子 #8: 40S ribosomal protein S12
+分子 #9: 40S ribosomal protein S29
+分子 #10: 40S ribosomal protein S15
+分子 #11: 40S ribosomal protein S3
+分子 #12: 40S ribosomal protein S19
+分子 #13: 40S ribosomal protein S25
+分子 #14: 40S ribosomal protein S18
+分子 #15: 40S ribosomal protein S5
+分子 #16: Ubiquitin-40S ribosomal protein S27a
+分子 #17: 40S ribosomal protein S16
+分子 #18: 18S rRNA
+分子 #19: MAGNESIUM ION
+分子 #20: ZINC ION
-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 |
-試料調製
緩衝液 | pH: 7.4 |
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凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / 装置: FEI VITROBOT MARK IV |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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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 FIELDBright-field microscopy |
撮影 | フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 検出モード: INTEGRATING / 平均露光時間: 1.0 sec. / 平均電子線量: 107.0 e/Å2 |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |