ジャーナル: Nat Methods / 年: 2023 タイトル: Parallel cryo electron tomography on in situ lamellae. 著者: Fabian Eisenstein / Haruaki Yanagisawa / Hiroka Kashihara / Masahide Kikkawa / Sachiko Tsukita / Radostin Danev / 要旨: In situ cryo electron tomography of cryo focused ion beam milled samples has emerged in recent years as a powerful technique for structural studies of macromolecular complexes in their native ...In situ cryo electron tomography of cryo focused ion beam milled samples has emerged in recent years as a powerful technique for structural studies of macromolecular complexes in their native cellular environment. However, the possibilities for recording tomographic tilt series in a high-throughput manner are limited, in part by the lamella-shaped samples. Here we utilize a geometrical sample model and optical image shift to record tens of tilt series in parallel, thereby saving time and gaining access to sample areas conventionally used for tracking specimen movement. The parallel cryo electron tomography (PACE-tomo) method achieves a throughput faster than 5 min per tilt series and allows for the collection of sample areas that were previously unreachable, thus maximizing the amount of data from each lamella. Performance testing with ribosomes in vitro and in situ on state-of-the-art and general-purpose microscopes demonstrated the high throughput and quality of PACE-tomo.
凍結剤: ETHANE-PROPANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV
-
電子顕微鏡法
顕微鏡
TFS KRIOS
撮影
フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 検出モード: COUNTING / 撮影したグリッド数: 1 / 平均露光時間: 0.25 sec. / 平均電子線量: 4.2 e/Å2 詳細: 121 tilt series were recorded in parallel using beam image shift