Biotechnology and Biological Sciences Research Council (BBSRC)
BB/P020208/1
英国
Biotechnology and Biological Sciences Research Council (BBSRC)
BB/P026397/1
英国
Wellcome Trust
108466/Z/15/Z
英国
引用
ジャーナル: Structure / 年: 2020 タイトル: Need for Speed: Examining Protein Behavior during CryoEM Grid Preparation at Different Timescales. 著者: David P Klebl / Molly S C Gravett / Dimitrios Kontziampasis / David J Wright / Robin S Bon / Diana C F Monteiro / Martin Trebbin / Frank Sobott / Howard D White / Michele C Darrow / Rebecca F ...著者: David P Klebl / Molly S C Gravett / Dimitrios Kontziampasis / David J Wright / Robin S Bon / Diana C F Monteiro / Martin Trebbin / Frank Sobott / Howard D White / Michele C Darrow / Rebecca F Thompson / Stephen P Muench / 要旨: A host of new technologies are under development to improve the quality and reproducibility of cryoelectron microscopy (cryoEM) grid preparation. Here we have systematically investigated the ...A host of new technologies are under development to improve the quality and reproducibility of cryoelectron microscopy (cryoEM) grid preparation. Here we have systematically investigated the preparation of three macromolecular complexes using three different vitrification devices (Vitrobot, chameleon, and a time-resolved cryoEM device) on various timescales, including grids made within 6 ms (the fastest reported to date), to interrogate particle behavior at the air-water interface for different timepoints. Results demonstrate that different macromolecular complexes can respond to the thin-film environment formed during cryoEM sample preparation in highly variable ways, shedding light on why cryoEM sample preparation can be difficult to optimize. We demonstrate that reducing time between sample application and vitrification is just one tool to improve cryoEM grid quality, but that it is unlikely to be a generic "silver bullet" for improving the quality of every cryoEM sample preparation.
名称: 70S ribosome from E. coli / タイプ: complex / ID: 1 / 親要素: 0
由来(天然)
生物種: Escherichia coli (大腸菌)
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実験情報
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構造解析
手法
クライオ電子顕微鏡法
解析
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
3.3 mg/mL
緩衝液
pH: 7.5
凍結
凍結剤: ETHANE / チャンバー内湿度: 80 % / チャンバー内温度: 293 K / 装置: HOMEMADE PLUNGER 詳細: the sample was sprayed using a microfludic nozzle, resulting in a delay of 13ms between spraying and freezing.
詳細
the sample was a mixture of 30S, 50S and 70S ribosomes, purchased from New England Biolabs (P0763S)
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
撮影
フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 検出モード: INTEGRATING / 平均露光時間: 1.5 sec. / 平均電子線量: 77.0 e/Å2
タイプ: MAXIMUM LIKELIHOOD / ソフトウェア - 名称: RELION 詳細: The final angular assignment was done in a bigger, combined dataset which was then split into the original datasets to generate this reconstruction