Download MendeleySingle-particle cryo-EM structures from iDPC-STEM at near-atomic resolution.
Lazic, I., Wirix, M., Leidl, M.L., de Haas, F., Mann, D., Beckers, M., Pechnikova, E.V., Muller-Caspary, K., Egoavil, R., Bosch, E.G.T., Sachse, C.(2022) Nat Methods 19: 1126-1136
- PubMed: 36064775
- DOI: https://doi.org/10.1038/s41592-022-01586-0
- Primary Citation of Related Structures:
7Q22, 7Q23, 7Q2Q, 7Q2R, 7Q2S - PubMed Abstract:
In electron cryomicroscopy (cryo-EM), molecular images of vitrified biological samples are obtained by conventional transmission microscopy (CTEM) using large underfocuses and subsequently computationally combined into a high-resolution three-dimensional structure. Here, we apply scanning transmission electron microscopy (STEM) using the integrated differential phase contrast mode also known as iDPC-STEM to two cryo-EM test specimens, keyhole limpet hemocyanin (KLH) and tobacco mosaic virus (TMV). The micrographs show complete contrast transfer to high resolution and enable the cryo-EM structure determination for KLH at 6.5 Å resolution, as well as for TMV at 3.5 Å resolution using single-particle reconstruction methods, which share identical features with maps obtained by CTEM of a previously acquired same-sized TMV data set. These data show that STEM imaging in general, and in particular the iDPC-STEM approach, can be applied to vitrified single-particle specimens to determine near-atomic resolution cryo-EM structures of biological macromolecules.
Organizational Affiliation:
Materials and Structural Analysis Division, Thermo Fisher Scientific, Eindhoven, Netherlands. ivan.lazic@thermofisher.com.
