+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-4490 | |||||||||
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タイトル | cryo-ET of cryo-FIB milled HeLa cells overexpressing GFP-Bax | |||||||||
マップデータ | Reconstructed cryo-tomogram of mitochondrion in HeLa cells overexpressing GFP-Bax | |||||||||
試料 |
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生物種 | Homo sapiens (ヒト) | |||||||||
手法 | 電子線トモグラフィー法 / クライオ電子顕微鏡法 | |||||||||
データ登録者 | Ader NR / Hoffmann PC / Ganeva I / Borgeaud AC / Wang C / Youle RJ / Kukulski W | |||||||||
引用 | ジャーナル: Elife / 年: 2019 タイトル: Molecular and topological reorganizations in mitochondrial architecture interplay during Bax-mediated steps of apoptosis. 著者: Nicholas R Ader / Patrick C Hoffmann / Iva Ganeva / Alicia C Borgeaud / Chunxin Wang / Richard J Youle / Wanda Kukulski / 要旨: During apoptosis, Bcl-2 proteins such as Bax and Bak mediate the release of pro-apoptotic proteins from the mitochondria by clustering on the outer mitochondrial membrane and thereby permeabilizing ...During apoptosis, Bcl-2 proteins such as Bax and Bak mediate the release of pro-apoptotic proteins from the mitochondria by clustering on the outer mitochondrial membrane and thereby permeabilizing it. However, it remains unclear how outer membrane openings form. Here, we combined different correlative microscopy and electron cryo-tomography approaches to visualize the effects of Bax activity on mitochondria in human cells. Our data show that Bax clusters localize near outer membrane ruptures of highly variable size. Bax clusters contain structural elements suggesting a higher order organization of their components. Furthermore, unfolding of inner membrane cristae is coupled to changes in the supramolecular assembly of ATP synthases, particularly pronounced at membrane segments exposed to the cytosol by ruptures. Based on our results, we propose a comprehensive model in which molecular reorganizations of the inner membrane and sequestration of outer membrane components into Bax clusters interplay in the formation of outer membrane ruptures. EDITORIAL NOTE: This article has been through an editorial process in which the authors decide how to respond to the issues raised during peer review. The Reviewing Editor's assessment is that all ...EDITORIAL NOTE: This article has been through an editorial process in which the authors decide how to respond to the issues raised during peer review. The Reviewing Editor's assessment is that all the issues have been addressed (see decision letter). | |||||||||
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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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_4490.map.gz | 1.7 GB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-4490-v30.xml emd-4490.xml | 13.2 KB 13.2 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_4490.png | 142 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-4490 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-4490 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_4490_validation.pdf.gz | 221.1 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_4490_full_validation.pdf.gz | 220.2 KB | 表示 | |
XML形式データ | emd_4490_validation.xml.gz | 5.2 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4490 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4490 | 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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-マップ
ファイル | ダウンロード / ファイル: emd_4490.map.gz / 形式: CCP4 / 大きさ: 1.8 GB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Reconstructed cryo-tomogram of mitochondrion in HeLa cells overexpressing GFP-Bax | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 これらの図は立方格子座標系で作成されたものです | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 15.01 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 : HeLa (homo sapiens)
全体 | 名称: HeLa (homo sapiens) |
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要素 |
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-超分子 #1: HeLa (homo sapiens)
超分子 | 名称: HeLa (homo sapiens) / タイプ: cell / ID: 1 / 親要素: 0 詳細: Cryofixation of cell was performed 16 h after transfection of GFP-Bax plasmid. |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
-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 | 電子線トモグラフィー法 |
試料の集合状態 | cell |
-試料調製
緩衝液 | pH: 7.4 詳細: DMEM, high glucose, GlutaMAX, pyruvate (Thermo 31996) medium supplemented with 10% heat-inactivated FBS (Gibco 10270), 10 mM HEPES, and 1x NEAA (Thermo 11140) |
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グリッド | モデル: Quantifoil R2/2 / 材質: GOLD / メッシュ: 200 / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: HOLEY |
凍結 | 凍結剤: ETHANE / 装置: HOMEMADE PLUNGER 詳細: Grids were manually backside blotted using Whatman filter paper No. 1 and vitrified using a manual plunger.. |
詳細 | HeLa cells were grown for 24 h on 200 mesh gold grids with a holey carbon film R2/2 (Quantifoil) in 6-well plates and transfected with 2000 ng hBax-C3-EGFP plasmid in presence of Q-VD-OPh. 16 hours after transfection, cells were stained with MitoTracker Deep Red, grids were manually backside blotted using Whatman filter paper No. 1 and vitrified using a manual plunger. |
切片作成 | 集束イオンビーム - 装置: OTHER / 集束イオンビーム - イオン: OTHER / 集束イオンビーム - 電圧: 30 kV / 集束イオンビーム - 電流: 1 nA / 集束イオンビーム - 時間: 10800 sec. / 集束イオンビーム - 温度: 83 K / 集束イオンビーム - Initial thickness: 1000 nm / 集束イオンビーム - 最終 厚さ: 200 nm 集束イオンビーム - 詳細: Cells were cryo-FIB milled to prepare lamellae using a Scios DualBeam FIB/SEM (FEI) equipped with a Quorum cryo-stage (PP3010T), following the protocol described in ...集束イオンビーム - 詳細: Cells were cryo-FIB milled to prepare lamellae using a Scios DualBeam FIB/SEM (FEI) equipped with a Quorum cryo-stage (PP3010T), following the protocol described in Schaffer et al. (2015). In brief, grids were coated with an organic Pt compound using the gas injection system for either 8 s at 12 mm working distance or 30 s at 13 mm working distance from a stage tilt of 25 degrees. The stage was then tilted so that the grid was at a 10 degree angle towards the ion beam for all subsequent steps. The electron beam was used at 13 pA and 5-10 kV to locate cells, 2 kV for subsequent imaging. The ion beam was used at 30 kV and 10 pA for imaging. Rough milling was performed at 30 kV ion beam voltage, and subsequently the current was reduced from 0.5 nA to 0.3 nA until a lamella thickness of 5 um was reached, and further to 0.1 nA until 1 um lamella thickness. Fine milling to a final lamella thickness of approximately 200 nm was performed either at 30 kV and 30 pA, or 16 kV and 11 pA ion beam setting.. The value given for _emd_sectioning_focused_ion_beam.instrument is FEI Scios DualBeam FIB/SEM. This is not in a list of allowed values set(['DB235', 'OTHER']) so OTHER is written into the XML file. |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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特殊光学系 | エネルギーフィルター - 名称: GIF Quantum LS / エネルギーフィルター - スリット幅: 20 eV |
詳細 | Montaged images of the entire grid were acquired at low magnification at pixel size of either 190.9 or 99.4 nm. Intermediate magnification maps of lamella were acquired at pixel size 5.5 nm. |
撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: COUNTING / デジタル化 - サイズ - 横: 3710 pixel / デジタル化 - サイズ - 縦: 3838 pixel / 平均電子線量: 1.1 e/Å2 詳細: Electron cryo-tomographic tilt-series were collected on a Titan Krios (FEI) operated at 300 kV using a Quantum energy filter (slit width 20 eV) and a K2 direct electron detector (Gatan) in ...詳細: Electron cryo-tomographic tilt-series were collected on a Titan Krios (FEI) operated at 300 kV using a Quantum energy filter (slit width 20 eV) and a K2 direct electron detector (Gatan) in counting mode at a pixel size of 3.7 angstroms and at a dose rate of ~ 2-4 e-/pixel/second on the detector, dependent on sample thickness. Tilt-series were acquired between +/- 60 degrees starting from 0 degrees with 1 degrees increment using SerialEM (Mastronarde, 2005) following a grouped dose-symmetric acquisition with a group size of 4 (Bharat et al., 2018; Hagen et al., 2017), and at -5 um defocus. A dose of approximately 1.0 to 1.2 e-/square angstroms was applied per image of the tilt-series. |
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 FIELD / 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): 5.0 µm |
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 |
-画像解析
最終 再構成 | アルゴリズム: SIMULTANEOUS ITERATIVE (SIRT) / ソフトウェア - 名称: eTomo (ver. 4.10.20) / 詳細: 10 iterations / 使用した粒子像数: 83 |
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