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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-8619 | |||||||||||||||
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タイトル | 70S ribosome bound with near-cognate ternary complex base-paired to A site codon, open 30S (Structure II-nc) | |||||||||||||||
![]() | 70S ribosome bound with near-cognate ternary complex base-paired to A site codon, open 30S (Structure II-nc): filtered map from Frealign (FFILT setting in Frealign = T), used for model building after B-factor sharpening. This volume not B-factor sharpened. | |||||||||||||||
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![]() | Ribosome / EF-Tu / tRNA | |||||||||||||||
機能・相同性 | ![]() guanyl-nucleotide exchange factor complex / negative regulation of cytoplasmic translational initiation / guanosine tetraphosphate binding / stringent response / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / translational elongation / RNA folding ...guanyl-nucleotide exchange factor complex / negative regulation of cytoplasmic translational initiation / guanosine tetraphosphate binding / stringent response / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / translational elongation / RNA folding / transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis / negative regulation of cytoplasmic translation / translation elongation factor activity / four-way junction DNA binding / translational termination / DnaA-L2 complex / translation repressor activity / negative regulation of translational initiation / negative regulation of DNA-templated DNA replication initiation / regulation of mRNA stability / mRNA regulatory element binding translation repressor activity / ribosome assembly / positive regulation of RNA splicing / assembly of large subunit precursor of preribosome / transcription elongation factor complex / cytosolic ribosome assembly / regulation of DNA-templated transcription elongation / DNA endonuclease activity / ribosomal large subunit assembly / transcription antitermination / response to reactive oxygen species / translational initiation / regulation of cell growth / DNA-templated transcription termination / maintenance of translational fidelity / response to radiation / mRNA 5'-UTR binding / large ribosomal subunit / ribosome biogenesis / ribosome binding / regulation of translation / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / transferase activity / 5S rRNA binding / large ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / molecular adaptor activity / rRNA binding / negative regulation of translation / ribosome / structural constituent of ribosome / translation / response to antibiotic / GTPase activity / negative regulation of DNA-templated transcription / mRNA binding / GTP binding / DNA binding / RNA binding / zinc ion binding / membrane / plasma membrane / cytosol / cytoplasm 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 / 解像度: 3.9 Å | |||||||||||||||
![]() | Loveland AB / Demo G | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Ensemble cryo-EM elucidates the mechanism of translation fidelity. 著者: Anna B Loveland / Gabriel Demo / Nikolaus Grigorieff / Andrei A Korostelev / ![]() 要旨: Gene translation depends on accurate decoding of mRNA, the structural mechanism of which remains poorly understood. Ribosomes decode mRNA codons by selecting cognate aminoacyl-tRNAs delivered by ...Gene translation depends on accurate decoding of mRNA, the structural mechanism of which remains poorly understood. Ribosomes decode mRNA codons by selecting cognate aminoacyl-tRNAs delivered by elongation factor Tu (EF-Tu). Here we present high-resolution structural ensembles of ribosomes with cognate or near-cognate aminoacyl-tRNAs delivered by EF-Tu. Both cognate and near-cognate tRNA anticodons explore the aminoacyl-tRNA-binding site (A site) of an open 30S subunit, while inactive EF-Tu is separated from the 50S subunit. A transient conformation of decoding-centre nucleotide G530 stabilizes the cognate codon-anticodon helix, initiating step-wise 'latching' of the decoding centre. The resulting closure of the 30S subunit docks EF-Tu at the sarcin-ricin loop of the 50S subunit, activating EF-Tu for GTP hydrolysis and enabling accommodation of the aminoacyl-tRNA. By contrast, near-cognate complexes fail to induce the G530 latch, thus favouring open 30S pre-accommodation intermediates with inactive EF-Tu. This work reveals long-sought structural differences between the pre-accommodation of cognate and near-cognate tRNAs that elucidate the mechanism of accurate decoding. | |||||||||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
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 | ![]() | 100.7 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 85.2 KB 85.2 KB | 表示 表示 | ![]() |
画像 | ![]() | 163.4 KB | ||
Filedesc metadata | ![]() | 15.2 KB | ||
その他 | ![]() ![]() | 101.7 MB 101.6 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 5uypMC ![]() 8615C ![]() 8616C ![]() 8617C ![]() 8618C ![]() 8620C ![]() 5uykC ![]() 5uylC ![]() 5uymC ![]() 5uynC ![]() 5uyqC 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 |
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リンク
EMDBのページ | ![]() ![]() |
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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 | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | 70S ribosome bound with near-cognate ternary complex base-paired to A site codon, open 30S (Structure II-nc): filtered map from Frealign (FFILT setting in Frealign = T), used for model building after B-factor sharpening. This volume not B-factor sharpened. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 0.82 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
-ハーフマップ: 70S ribosome bound with near-cognate ternary complex base-paired...
ファイル | emd_8619_half_map_1.map | ||||||||||||
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注釈 | 70S ribosome bound with near-cognate ternary complex base-paired to A site codon, open 30S (Structure II-nc): half map (1) suitable for resolution calculation. | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: 70S ribosome bound with near-cognate ternary complex base-paired...
ファイル | emd_8619_half_map_2.map | ||||||||||||
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注釈 | 70S ribosome bound with near-cognate ternary complex base-paired to A site codon, open 30S (Structure II-nc): half map (2) suitable for resolution calculation. | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
+全体 : 70S ribosome bound with near-cognate ternary complex base-paired ...
+超分子 #1: 70S ribosome bound with near-cognate ternary complex base-paired ...
+分子 #1: 50S ribosomal protein L2
+分子 #2: 50S ribosomal protein L3
+分子 #3: 50S ribosomal protein L4
+分子 #4: 50S ribosomal protein L5
+分子 #5: 50S ribosomal protein L6
+分子 #6: 50S ribosomal protein L9
+分子 #7: 50S ribosomal protein L10
+分子 #8: 50S ribosomal protein L11
+分子 #9: 50S ribosomal protein L13
+分子 #10: 50S ribosomal protein L14
+分子 #11: 50S ribosomal protein L15
+分子 #12: 50S ribosomal protein L16
+分子 #13: 50S ribosomal protein L17
+分子 #14: 50S ribosomal protein L18
+分子 #15: 50S ribosomal protein L19
+分子 #16: 50S ribosomal protein L20
+分子 #17: 50S ribosomal protein L21
+分子 #18: 50S ribosomal protein L22
+分子 #19: 50S ribosomal protein L23
+分子 #20: 50S ribosomal protein L24
+分子 #21: 50S ribosomal protein L25
+分子 #22: 50S ribosomal protein L27
+分子 #23: 50S ribosomal protein L28
+分子 #24: 50S ribosomal protein L29
+分子 #25: 50S ribosomal protein L30
+分子 #26: 50S ribosomal protein L31
+分子 #27: 50S ribosomal protein L32
+分子 #28: 50S ribosomal protein L33
+分子 #29: 50S ribosomal protein L34
+分子 #30: 50S ribosomal protein L35
+分子 #31: 50S ribosomal protein L36
+分子 #32: 30S ribosomal protein S2
+分子 #33: 30S ribosomal protein S3
+分子 #34: 30S ribosomal protein S4
+分子 #35: 30S ribosomal protein S5
+分子 #36: 30S ribosomal protein S6
+分子 #37: 30S ribosomal protein S7
+分子 #38: 30S ribosomal protein S8
+分子 #39: 30S ribosomal protein S9
+分子 #40: 30S ribosomal protein S10
+分子 #41: 30S ribosomal protein S11
+分子 #42: 30S ribosomal protein S12
+分子 #43: 30S ribosomal protein S13
+分子 #44: 30S ribosomal protein S14
+分子 #45: 30S ribosomal protein S15
+分子 #46: 30S ribosomal protein S16
+分子 #47: 30S ribosomal protein S17
+分子 #48: 30S ribosomal protein S18
+分子 #49: 30S ribosomal protein S19
+分子 #50: 30S ribosomal protein S20
+分子 #51: 30S ribosomal protein S21
+分子 #52: 50S ribosomal protein L1
+分子 #59: Elongation factor Tu 2
+分子 #53: 16S ribosomal RNA
+分子 #54: 23S ribosomal RNA
+分子 #55: 5S ribosomal RNA
+分子 #56: tRNAfMet
+分子 #57: mRNA
+分子 #58: tRNALys
+分子 #60: N-FORMYLMETHIONINE
+分子 #61: LYSINE
+分子 #62: PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.5 構成要素:
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グリッド | モデル: C-flat-1.2/1.3 / 材質: COPPER / メッシュ: 400 / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: HOLEY ARRAY / 前処理 - タイプ: GLOW DISCHARGE / 前処理 - 時間: 45 sec. / 前処理 - 雰囲気: AIR | |||||||||||||||||||||
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 90 % / チャンバー内温度: 275 K / 装置: GATAN CRYOPLUNGE 3 詳細: 2 uL of complex was applied to each grid. After a 10-second incubation, the grids were blotted for 2 to 4 seconds.. | |||||||||||||||||||||
詳細 | 125 nM 50S, 125 nM 30S, 625 nM mRNA, 250 nM fMet-tRNAfMet, 1.25 micromolar EF-Tu, 500 micromolar GDPCP, 1.25 micromolar Lys-tRNALys |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: SUPER-RESOLUTION / デジタル化 - サイズ - 横: 7676 pixel / デジタル化 - サイズ - 縦: 7420 pixel / デジタル化 - 画像ごとのフレーム数: 1-30 / 撮影したグリッド数: 3 / 実像数: 1773 / 平均露光時間: 0.4 sec. / 平均電子線量: 1.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 倍率(補正後): 60976 / 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): 5.0 µm / 最小 デフォーカス(公称値): 0.5 µm / 倍率(公称値): 60976 |
試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER 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
精密化 | 空間: REAL / プロトコル: FLEXIBLE FIT / 温度因子: 25 / 当てはまり具合の基準: correlation coefficient |
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得られたモデル | ![]() PDB-5uyp: |