Mass-selective and ice-free cryo-EM protein sample preparation via native electrospray ion-beam deposition
Mass-selective and ice-free cryo-EM protein sample preparation via native electrospray ion-beam deposition
复制标题
通过自然电喷雾离子束沉积进行质量选择性和无冰冷冻电镜蛋白质样品制备
DOI:
10.1101/2021.10.18.464782
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Esser T
中科院分区:
文献类型:
--
作者:
Esser T
< jats: title> Abstract< jats: p> Electron cryomicroscopy (cryo-EM) and single-particle analysis (SPA) have revolutionized structure determination of homogeneous proteins. However, obtaining high-resolution structures from heterogeneous samples remains a major challenge, as the various protein states embedded in thin films of vitreous ice may be classified incorrectly, resulting in detrimental averaging of features. Here we present native electrospray ion-beam deposition (native ES-IBD) for the preparation of extremely high-purity cryo-EM samples, based on mass selection in vacuum. Folded protein ions are generated by native electrospray ionization, mass-filtered, and gently deposited on cryo-EM grids, and subsequently frozen in liquid nitrogen. We demonstrate homogeneous coverage of ice-free cryo-EM grids with mass-selected proteins and protein assemblies. SPA reveals that they remain structurally intact, but variations in secondary and tertiary structure are currently limiting information in 2D classes and 3D EM density maps. Our results show the potential of native ES-IBD to increase the scope and throughput of cryo-EM structure determination.
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影响因子:
64.8
作者:
Nakane T;Kotecha A;Sente A;McMullan G;Masiulis S;Brown PMGE;Grigoras IT;Malinauskaite L;Malinauskas T;Miehling J;Uchański T;Yu L;Karia D;Pechnikova EV;de Jong E;Keizer J;Bischoff M;McCormack J;Tiemeijer P;Hardwick SW;Chirgadze DY;Murshudov G;Aricescu AR;Scheres SHW
通讯作者:
Scheres SHW
影响因子:
7.4
作者:
Brodbelt JS
通讯作者:
Brodbelt JS
影响因子:
16.6
作者:
Abb S;Harnau L;Gutzler R;Rauschenbach S;Kern K
通讯作者:
Kern K
影响因子:
3
作者:
Mastronarde, DN
通讯作者:
Mastronarde, DN
DOI:
10.1101/249128
发表时间:
2018-01
期刊:
bioRxiv
影响因子:
--
作者:
L. Kuhlen;P. Abrusci;Steven Johnson;J. Gault;J. Deme;Joseph J. E. Caesar;Tobias Dietsche;M. T. Mebrhatu;T. Ganief;B. Maček;Samuel Wagner;C. Robinson;S. Lea
通讯作者:
L. Kuhlen;P. Abrusci;Steven Johnson;J. Gault;J. Deme;Joseph J. E. Caesar;Tobias Dietsche;M. T. Mebrhatu;T. Ganief;B. Maček;Samuel Wagner;C. Robinson;S. Lea