Rabbit muscle aldolase determined using single-particle cryo-EM with Apollo camera.
マップデータ
sharpened and masked map
試料
複合体: Aldolase from rabbit muscleFructose-bisphosphate aldolase
タンパク質・ペプチド: Fructose-bisphosphate aldolase A
機能・相同性
機能・相同性情報
negative regulation of Arp2/3 complex-mediated actin nucleation / fructose-bisphosphate aldolase / fructose-bisphosphate aldolase activity / M band / fructose 1,6-bisphosphate metabolic process / I band / glycolytic process / protein homotetramerization / positive regulation of cell migration / 細胞質基質 類似検索 - 分子機能
Fructose-bisphosphate aldolase class-I active site / Fructose-bisphosphate aldolase class-I active site. / Fructose-bisphosphate aldolase, class-I / Fructose-bisphosphate aldolase class-I / Aldolase-type TIM barrel 類似検索 - ドメイン・相同性
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM143805
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM139616
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM119032
米国
引用
ジャーナル: J Struct Biol X / 年: 2023 タイトル: Characterizing the resolution and throughput of the Apollo direct electron detector. 著者: Ruizhi Peng / Xiaofeng Fu / Joshua H Mendez / Peter S Randolph / Benjamin E Bammes / Scott M Stagg / 要旨: Advances in electron detection have been essential to the success of high-resolution cryo-EM structure determination. A new generation of direct electron detector called the Apollo, has been ...Advances in electron detection have been essential to the success of high-resolution cryo-EM structure determination. A new generation of direct electron detector called the Apollo, has been developed by Direct Electron. The Apollo uses a novel event-based MAPS detector custom designed for ultra-fast electron counting. We have evaluated this new camera, finding that it delivers high detective quantum efficiency (DQE) and low coincidence loss, enabling high-quality electron counting data acquisition at up to nearly 80 input electrons per pixel per second. We further characterized the performance of Apollo for single particle cryo-EM on real biological samples. Using mouse apoferritin, Apollo yielded better than 1.9 Å resolution reconstructions at all three tested dose rates from a half-day data collection session each. With longer collection time and improved specimen preparation, mouse apoferritin was reconstructed to 1.66 Å resolution. Applied to a more challenging small protein aldolase, we obtained a 2.24 Å resolution reconstruction. The high quality of the map indicates that the Apollo has sufficiently high DQE to reconstruct smaller proteins and complexes with high-fidelity. Our results demonstrate that the Apollo camera performs well across a broad range of dose rates and is capable of capturing high quality data that produce high-resolution reconstructions for large and small single particle samples.
名称: Aldolase from rabbit muscleFructose-bisphosphate aldolase
要素
複合体: Aldolase from rabbit muscleFructose-bisphosphate aldolase
タンパク質・ペプチド: Fructose-bisphosphate aldolase A
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超分子 #1: Aldolase from rabbit muscle
超分子
名称: Aldolase from rabbit muscle / タイプ: complex / ID: 1 / キメラ: Yes / 親要素: 0 / 含まれる分子: all 詳細: Plays a key role in glycolysis and gluconeogenesis. In addition, may also function as scaffolding protein.
フィルム・検出器のモデル: OTHER / デジタル化 - サイズ - 横: 8192 pixel / デジタル化 - サイズ - 縦: 8192 pixel / 撮影したグリッド数: 1 / 実像数: 8682 / 平均露光時間: 1.347 sec. / 平均電子線量: 60.0 e/Å2 詳細: Images were collected using Direct Electron Apollo camera at a fixed movie frame rate of 60 frames/second.
実験機器
モデル: Titan Krios / 画像提供: FEI Company
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画像解析
粒子像選択
選択した数: 3805094 詳細: particles were picked using templates projected from EMD-21023.