+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-1652 | |||||||||
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タイトル | Cryo-EM structure of the mammalian Sec61 complex bound to the actively translating wheat germ 80S ribosome | |||||||||
マップデータ | The map represents an actively translating wheat germ ribosome with P-site tRNA and a nascent peptide containing the signal anchor sequence of DPAP-B (Dipeptidylaminopeptidase B) bound to the mammalian (Canis familiaris) Sec61 complex. | |||||||||
試料 |
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キーワード | Ribosome / protein exit tunnel / cotranslational protein translocation / protein conducting channel / signal sequence | |||||||||
機能・相同性 | 機能・相同性情報 Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / membrane docking / endoplasmic reticulum Sec complex / pronephric nephron development / cotranslational protein targeting to membrane / Ssh1 translocon complex / Sec61 translocon complex / protein targeting to ER / protein-transporting ATPase activity / protein insertion into ER membrane ...Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / membrane docking / endoplasmic reticulum Sec complex / pronephric nephron development / cotranslational protein targeting to membrane / Ssh1 translocon complex / Sec61 translocon complex / protein targeting to ER / protein-transporting ATPase activity / protein insertion into ER membrane / signal sequence binding / post-translational protein targeting to membrane, translocation / SRP-dependent cotranslational protein targeting to membrane, translocation / cleavage in ITS2 between 5.8S rRNA and LSU-rRNA of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / 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 / preribosome, large subunit precursor / protein transmembrane transporter activity / regulation of translational fidelity / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal large subunit biogenesis / ribosomal large subunit assembly / phospholipid binding / ribosome binding / cytosolic large ribosomal subunit / cytoplasmic translation / rRNA binding / structural constituent of ribosome / mRNA binding / endoplasmic reticulum membrane / endoplasmic reticulum / RNA binding / membrane / nucleus / cytoplasm / cytosol 類似検索 - 分子機能 | |||||||||
生物種 | Canis lupus familiaris (イヌ) | |||||||||
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: 6.48 Å | |||||||||
データ登録者 | 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 | |||||||||
引用 | ジャーナル: Science / 年: 2009 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
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_1652.map.gz | 17.3 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-1652-v30.xml emd-1652.xml | 12.8 KB 12.8 KB | 表示 表示 | EMDBヘッダ |
画像 | EMD-1652.jpg | 112.3 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-1652 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-1652 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_1652_validation.pdf.gz | 253.6 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_1652_full_validation.pdf.gz | 252.8 KB | 表示 | |
XML形式データ | emd_1652_validation.xml.gz | 7.1 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-1652 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-1652 | 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_1652.map.gz / 形式: CCP4 / 大きさ: 185.7 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | The map represents an actively translating wheat germ ribosome with P-site tRNA and a nascent peptide containing the signal anchor sequence of DPAP-B (Dipeptidylaminopeptidase B) bound to the mammalian (Canis familiaris) Sec61 complex. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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:
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 : Actively translating wheat germ (O. sativa) 80S ribosome programm...
全体 | 名称: Actively translating wheat germ (O. sativa) 80S ribosome programmed with a nascent polypeptide chain containing a P-site tRNA and the type I signal anchor sequence of DPAP-B ...名称: Actively translating wheat germ (O. sativa) 80S ribosome programmed with a nascent polypeptide chain containing a P-site tRNA and the type I signal anchor sequence of DPAP-B (Dipeptidylaminopeptidase B) bound to the mammalian (Canis familiaris) Sec61 complex. |
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要素 |
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-超分子 #1000: Actively translating wheat germ (O. sativa) 80S ribosome programm...
超分子 | 名称: Actively translating wheat germ (O. sativa) 80S ribosome programmed with a nascent polypeptide chain containing a P-site tRNA and the type I signal anchor sequence of DPAP-B ...名称: Actively translating wheat germ (O. sativa) 80S ribosome programmed with a nascent polypeptide chain containing a P-site tRNA and the type I signal anchor sequence of DPAP-B (Dipeptidylaminopeptidase B) bound to the mammalian (Canis familiaris) Sec61 complex. タイプ: sample / ID: 1000 詳細: 80S ribosomes and the digitonin solubilized Sec61 complex were reconstituted in vitro by adding 3 pmol of ribosome and Ssh1 complex in 10 fold molar excess 集合状態: 80S Ribosome bound to one copy of the heterotrimeric Sec61 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: Wheat germ (Triticum aestivum) 80 ribosome
超分子 | 名称: Wheat germ (Triticum aestivum) 80 ribosome / タイプ: complex / ID: 1 / Name.synonym: Wheat germ 80S ribosome / 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: Mammalian Sec61 complex
分子 | 名称: Mammalian Sec61 complex / タイプ: protein_or_peptide / ID: 1 / Name.synonym: Mammalian Sec61 complex / コピー数: 1 / 集合状態: Heterotrimer / 組換発現: No |
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由来(天然) | 生物種: Canis lupus familiaris (イヌ) / 別称: Dog / 組織: Pancreas / Organelle: Endoplasmic reticulum (ER) membrane / 細胞中の位置: Endoplasmic reticulum |
分子量 | 実験値: 70 KDa / 理論値: 70 KDa |
-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
濃度 | 0.02 mg/mL |
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緩衝液 | pH: 7.5 詳細: 30 mM HEPES/KOH, pH 7.5 180 mM KOAc, 10 mM Mg(OAc)2, 1 mM DTT,3.5 % (w/v) glycerol 0.3 % (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 layers of filter paper |
-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: 155 / 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: FIELD EMISSION GUN |
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): 4.7 µm / 最小 デフォーカス(公称値): 1.25 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 |
-画像解析
詳細 | Particles were selected using the program SIGNATURE and visually inspected The entire dataset (321000 particles) was sorted for presence of P-site tRNA and presence of ligand. |
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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: 6.48 Å / 解像度の算出法: FSC 0.5 CUT-OFF / ソフトウェア - 名称: SPIDER 詳細: Final map was filtered between 7-8 Angstroms for better visualization of the Sec61 complex 使用した粒子像数: 221445 |
最終 角度割当 | 詳細: SPIDER |