Molecular goniometers for single-particle cryo-electron microscopy of DNA-binding proteins.
Molecular goniometers for single-particle cryo-electron microscopy of DNA-binding proteins.
复制标题
用于DNA结合蛋白的单颗粒低温电子显微镜的分子测角仪。
DOI:
10.1038/s41587-020-0716-8
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发表时间:
2021-03
影响因子:
46.9
通讯作者:
Douglas SM
中科院分区:
文献类型:
--
作者:
Aksel T;Yu Z;Cheng Y;Douglas SM
Correct reconstruction of macromolecular structure by cryo-electron microscopy (cryo-EM) relies on accurate determination of the orientation of single-particle images. For small (<100 kDa) DNA-binding proteins, obtaining particle images with sufficiently asymmetric features to correctly guide alignment is challenging. We apply DNA origami to construct molecular goniometers—instruments that precisely orient objects—and use them to dock a DNA-binding protein on a double-helix stage that has user-programmable tilt and rotation angles. We construct goniometers with fourteen different stage configurations to orient and visualize the protein just above the cryo-EM grid surface. Each goniometer has a distinct barcode pattern that we use during particle classification to assign angle priors to the bound protein. We use goniometers to obtain a 6.5 Å structure of BurrH, an 82-kDa DNA-binding protein whose helical pseudosymmetry prevents accurate image orientation using traditional cryo-EM. Our approach should be adaptable to other DNA-binding proteins as well as small proteins fused to DNA-binding domains. DNA origami orients single proteins on a surface to aid structure determination by cryo-electron microscopy.
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影响因子:
14.9
作者:
Douglas SM;Marblestone AH;Teerapittayanon S;Vazquez A;Church GM;Shih WM
通讯作者:
Shih WM
影响因子:
48
作者:
Zheng SQ;Palovcak E;Armache JP;Verba KA;Cheng Y;Agard DA
通讯作者:
Agard DA
影响因子:
3
作者:
Tang, Guang;Peng, Liwei;Ludtke, Steven J.
通讯作者:
Ludtke, Steven J.
影响因子:
3.2
作者:
Wagenbauer, Klaus F.;Engelhardt, Floris A. S.;Dietz, Hendrik
通讯作者:
Dietz, Hendrik
影响因子:
3.2
作者:
Nafisi, Parsa M.;Aksel, Tural;Douglas, Shawn M.
通讯作者:
Douglas, Shawn M.