- EMDB-18194: Cryo-electron tomogram of GEM2-labelled Mito-EGFP in HeLa cells -
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基本情報
登録情報
データベース: EMDB / ID: EMD-18194
タイトル
Cryo-electron tomogram of GEM2-labelled Mito-EGFP in HeLa cells
マップデータ
Unfiltered tomogram corresponding to tilt series TS_010.mrc of Dataset 2 (220330) of EMPIAR-11561
試料
細胞: Cryo-focused ion beam lamella of a HeLa cell expressing an engineered genetically encoded multimeric tag GEM2 coupled to stably expressed Mito-EGFP upon treatment with rapalog
キーワード
Encapsulin / Protein Engineering / Synechococcus elongatus Srp1 / intracellular labeling of mitochondrial-targeted EGFP / CYTOSOLIC PROTEIN
EIPOD fellowship under Marie Sklodowska-Curie Actions COFUND
664726
ドイツ
H2020 Marie Curie Actions of the European Commission
101028297
European Union
Human Frontier Science Program (HFSP)
CDA00045/2019
フランス
Other private
Biomedicum Helsinki Foundation
フィンランド
Other private
Orion Foundation
フィンランド
引用
ジャーナル: Nat Methods / 年: 2023 タイトル: Genetically encoded multimeric tags for subcellular protein localization in cryo-EM. 著者: Herman K H Fung / Yuki Hayashi / Veijo T Salo / Anastasiia Babenko / Ievgeniia Zagoriy / Andreas Brunner / Jan Ellenberg / Christoph W Müller / Sara Cuylen-Haering / Julia Mahamid / 要旨: Cryo-electron tomography (cryo-ET) allows for label-free high-resolution imaging of macromolecular assemblies in their native cellular context. However, the localization of macromolecules of interest ...Cryo-electron tomography (cryo-ET) allows for label-free high-resolution imaging of macromolecular assemblies in their native cellular context. However, the localization of macromolecules of interest in tomographic volumes can be challenging. Here we present a ligand-inducible labeling strategy for intracellular proteins based on fluorescent, 25-nm-sized, genetically encoded multimeric particles (GEMs). The particles exhibit recognizable structural signatures, enabling their automated detection in cryo-ET data by convolutional neural networks. The coupling of GEMs to green fluorescent protein-tagged macromolecules of interest is triggered by addition of a small-molecule ligand, allowing for time-controlled labeling to minimize disturbance to native protein function. We demonstrate the applicability of GEMs for subcellular-level localization of endogenous and overexpressed proteins across different organelles in human cells using cryo-correlative fluorescence and cryo-ET imaging. We describe means for quantifying labeling specificity and efficiency, and for systematic optimization for rare and abundant protein targets, with emphasis on assessing the potential effects of labeling on protein function.
A: 14001.399 Å / B: 19728.0 Å / C: 6850.0 Å α=β=γ: 90.0 °
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添付データ
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試料の構成要素
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全体 : Cryo-focused ion beam lamella of a HeLa cell expressing an engine...
全体
名称: Cryo-focused ion beam lamella of a HeLa cell expressing an engineered genetically encoded multimeric tag GEM2 coupled to stably expressed Mito-EGFP upon treatment with rapalog
要素
細胞: Cryo-focused ion beam lamella of a HeLa cell expressing an engineered genetically encoded multimeric tag GEM2 coupled to stably expressed Mito-EGFP upon treatment with rapalog
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超分子 #1: Cryo-focused ion beam lamella of a HeLa cell expressing an engine...
超分子
名称: Cryo-focused ion beam lamella of a HeLa cell expressing an engineered genetically encoded multimeric tag GEM2 coupled to stably expressed Mito-EGFP upon treatment with rapalog タイプ: cell / ID: 1 / 親要素: 0 / 含まれる分子: #1
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 / 集束イオンビーム - 電流: 0.05 / 集束イオンビーム - 時間: 480 / 集束イオンビーム - 温度: 87 K / 集束イオンビーム - Initial thickness: 1000 / 集束イオンビーム - 最終 厚さ: 200 集束イオンビーム - 詳細: The value given for _em_focused_ion_beam.instrument is TFS Aquilos. This is not in a list of allowed values {'DB235', 'OTHER'} so OTHER is written into the XML file.
アルゴリズム: BACK PROJECTION / 解像度のタイプ: BY AUTHOR / 解像度: 13.7 Å / ソフトウェア - バージョン: 1.3.1 詳細: Tilt-series alignment and tomogram reconstruction performed with AreTomo version 1.3.1, doi: 10.1016/j.yjsbx.2022.100068. 使用した粒子像数: 53