Single-step antibody-based affinity cryo-electron microscopy for imaging and structural analysis of macromolecular assemblies.
Single-step antibody-based affinity cryo-electron microscopy for imaging and structural analysis of macromolecular assemblies.
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DOI:
10.1016/j.jsb.2014.04.006
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发表时间:
2014-07
影响因子:
3
通讯作者:
Jiang, Wen
中科院分区:
文献类型:
--
作者:
Yu, Guimei;Vago, Frank;Zhang, Dongsheng;Snyder, Jonathan E.;Yan, Rui;Zhang, Ci;Benjamin, Christopher;Jiang, Xi;Kuhn, Richard J.;Serwer, Philip;Thompson, David H.;Jiang, Wen
关键词:
Single particle cryo-electron microscopy (cryo-EM) is an emerging powerful tool for structural studies of macromolecular assemblies (i.e., protein complexes and viruses). Although single particle cryo-EM requires less concentrated and smaller amounts of samples than X-ray crystallography, it remains challenging to study specimens that are low-abundance, low-yield, or short-lived. The recent development of affinity grid techniques can potentially further extend single particle cryo-EM to these challenging samples by combining sample purification and cryo-EM grid preparation into a single step. Here we report a new design of affinity cryo-EM approach, cryo-SPIEM, that applies a traditional pathogen diagnosis tool Solid Phase Immune Electron Microscopy (SPIEM) to the single particle cryo-EM method. This approach provides an alternative, largely simplified and easier to use affinity grid that directly works with most native macromolecular complexes with established antibodies, and enables cryo-EM studies of native samples directly from cell cultures. In the present work, we extensively tested the feasibility of cryo-SPIEM with multiple samples including those of high or low molecular weight, macromolecules with low or high symmetry, His-tagged or native particles, and high- or low-yield macromolecules. Results for all these samples (nonpurified His-tagged bacteriophage T7, His-tagged E. coli ribosomes, native Sindbis virus, and purified but low-concentration native Tulane virus) demonstrated the capability of cryo-SPIEM approach in specifically trapping and concentrating target particles on TEM grids with minimal view constraints for cryo-EM imaging and determination of 3D structures.
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DOI:
10.1073/pnas.1215563110
发表时间:
2013-04-23
影响因子:
11.1
作者:
Guo, Fei;Liu, Zheng;Jiang, Wen
通讯作者:
Jiang, Wen
影响因子:
5.4
作者:
Farkas, Tibor;Sestak, Karol;Jiang, Xi
通讯作者:
Jiang, Xi
DOI:
10.1126/science.1187433
发表时间:
2010-08-27
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Liu H;Jin L;Koh SB;Atanasov I;Schein S;Wu L;Zhou ZH
通讯作者:
Zhou ZH
影响因子:
3.8
作者:
Duizer, E;Schwab, KJ;Estes, MK
通讯作者:
Estes, MK
影响因子:
3
作者:
Han, Bong-Gyoon;Walton, Ross W.;Glaeser, Robert M.
通讯作者:
Glaeser, Robert M.