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基本情報
登録情報 | ![]() | |||||||||
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タイトル | Cryo-EM structure of the programmed yeast 80 ribosome bound the Ssh1 complex | |||||||||
![]() | This map is derived from all particles representing a yeast 80S ribosome bound the Ssh1 complex in a unratcheted conformation before sorting for the conformation of ES27, and the presence of Ssh and tRNA (see also Fig S1 and Fig S2A in the accompanying paper). | |||||||||
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![]() | Ribosome / protein exit tunnel / cotranslational protein translocation / protein conducting channel / signal sequence | |||||||||
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: 6.1 Å | |||||||||
![]() | Becker T / Mandon E / Bhushan S / Jarasch A / Armache JP / Funes S / Jossinet F / Gumbart J / Mielke T / Berninghausen O ...Becker T / Mandon E / Bhushan S / Jarasch A / Armache JP / Funes S / Jossinet F / Gumbart J / Mielke T / Berninghausen O / Schulten K / Westhof E / Gilmore R / Beckmann R | |||||||||
![]() | ![]() タイトル: Structure of monomeric yeast and mammalian Sec61 complexes interacting with the translating ribosome. 著者: Thomas Becker / Shashi Bhushan / Alexander Jarasch / Jean-Paul Armache / Soledad Funes / Fabrice Jossinet / James Gumbart / Thorsten Mielke / Otto Berninghausen / Klaus Schulten / Eric ...著者: Thomas Becker / Shashi Bhushan / Alexander Jarasch / Jean-Paul Armache / Soledad Funes / Fabrice Jossinet / James Gumbart / Thorsten Mielke / Otto Berninghausen / Klaus Schulten / Eric Westhof / Reid Gilmore / Elisabet C Mandon / Roland Beckmann / ![]() 要旨: The trimeric Sec61/SecY complex is a protein-conducting channel (PCC) for secretory and membrane proteins. Although Sec complexes can form oligomers, it has been suggested that a single copy may ...The trimeric Sec61/SecY complex is a protein-conducting channel (PCC) for secretory and membrane proteins. Although Sec complexes can form oligomers, it has been suggested that a single copy may serve as an active PCC. We determined subnanometer-resolution cryo-electron microscopy structures of eukaryotic ribosome-Sec61 complexes. In combination with biochemical data, we found that in both idle and active states, the Sec complex is not oligomeric and interacts mainly via two cytoplasmic loops with the universal ribosomal adaptor site. In the active state, the ribosomal tunnel and a central pore of the monomeric PCC were occupied by the nascent chain, contacting loop 6 of the Sec complex. This provides a structural basis for the activity of a solitary Sec complex in cotranslational protein translocation. | |||||||||
履歴 |
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構造の表示
構造ビューア | EMマップ: ![]() ![]() ![]() |
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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 | ![]() | 16.8 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 12.5 KB 12.5 KB | 表示 表示 | ![]() |
画像 | ![]() ![]() | 73.7 KB 91.5 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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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 | This map is derived from all particles representing a yeast 80S ribosome bound the Ssh1 complex in a unratcheted conformation before sorting for the conformation of ES27, and the presence of Ssh and tRNA (see also Fig S1 and Fig S2A in the accompanying paper). | ||||||||||||||||||||||||||||||||||||
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: 1.2375 Å | ||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
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試料の構成要素
-全体 : This map represents a yeast 80S ribosome in the unratcheted confo...
全体 | 名称: This map represents a yeast 80S ribosome in the unratcheted conformation with the yeast Ssh1 complex bound after sorting the entire dataset against an empty (ratcheted) yeast 80S ribosome |
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要素 |
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-超分子 #1000: This map represents a yeast 80S ribosome in the unratcheted confo...
超分子 | 名称: This map represents a yeast 80S ribosome in the unratcheted conformation with the yeast Ssh1 complex bound after sorting the entire dataset against an empty (ratcheted) yeast 80S ribosome タイプ: sample / ID: 1000 詳細: 80S ribosomes and the detergent solubilized Ssh1 complex were reconstituted in vitro by adding 1 pmol of ribosome and Ssh1 complex in 5 fold molar excess 集合状態: 80S Ribosome bound to one copy of the heterotrimeric Ssh1 complex Number unique components: 2 |
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分子量 | 実験値: 4.2 MDa / 理論値: 4.2 MDa / 手法: Known for 80S ribosomes |
-超分子 #1: Yeast 80S ribosome bound to the yeast Ssh1 complex
超分子 | 名称: Yeast 80S ribosome bound to the yeast Ssh1 complex / タイプ: complex / ID: 1 Name.synonym: Yeast 80S ribosome bound to the yeast Ssh1 complex Ribosome-details: ribosome-eukaryote: ALL |
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分子量 | 実験値: 4.2 MDa / 理論値: 4.2 MDa |
-分子 #1: Ssh1 complex
分子 | 名称: Ssh1 complex / タイプ: ligand / ID: 1 / Name.synonym: Ssh1 complex / 詳細: His FLAG-tagged / コピー数: 1 / 集合状態: heterotrimer / 組換発現: Yes |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 71.5 KDa |
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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![]() | 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 | 0.02 mg/mL |
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緩衝液 | pH: 7.5 詳細: 20 mM HEPES/KOH, pH 7.5 100 mM KOAc, 10 mM Mg(OAc)2, 1.5 mM DTT, 0.1 % (w/v) digitonin |
染色 | タイプ: NEGATIVE / 詳細: Cryo-EM |
グリッド | 詳細: Quantifoil grids (3/3) with 2 nm carbon on top |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 95 % / 装置: OTHER / 詳細: Vitrification instrument: Vitrobot 手法: Blot for 10 seconds before plunging, use 2 layer of filter paper |
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電子顕微鏡法
顕微鏡 | FEI POLARA 300 |
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温度 | 平均: 84 K |
アライメント法 | Legacy - 非点収差: Objective lens astgnatism was corrected at 100000 times magnification |
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: PRIMESCAN / デジタル化 - サンプリング間隔: 4.76 µm / 実像数: 185 / 平均電子線量: 25 e/Å2 / 詳細: Scanned at 5334 dpi / Od range: 1.2 / ビット/ピクセル: 16 |
Tilt angle min | 0 |
Tilt angle max | 0 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 倍率(補正後): 38000 / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.26 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): 1.2 µm / 倍率(公称値): 39000 |
試料ステージ | 試料ホルダー: FEI Polara cartridge system / 試料ホルダーモデル: OTHER |
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 | Particles were selected using the program SIGNATURE and visually inspected |
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CTF補正 | 詳細: Defocus group volumes |
最終 再構成 | 想定した対称性 - 点群: C1 (非対称) / アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 6.1 Å / 解像度の算出法: FSC 0.5 CUT-OFF / ソフトウェア - 名称: SPIDER 詳細: The map representing all unratcheted particles is filtereb between 6.-8 Angstoms. Maps containing active and idle Ssh1 complex and the ES27 in exit-position are filtered between 8.3 and10.3 ...詳細: The map representing all unratcheted particles is filtereb between 6.-8 Angstoms. Maps containing active and idle Ssh1 complex and the ES27 in exit-position are filtered between 8.3 and10.3 Angstoms to better visualize the Ssh1 complex ES27. 使用した粒子像数: 183000 |
最終 角度割当 | 詳細: SPIDER |