Cryo-Electron Tomography: Can it Reveal the Molecular Sociology of Cells in Atomic Detail?

Trends Cell Biol. 2016 Nov;26(11):825-837. doi: 10.1016/j.tcb.2016.08.006. Epub 2016 Sep 23.


Traditionally, macromolecular structure determination is performed ex situ, that is, with purified materials. But, there are strong incentives to develop approaches to study them in situ in their native functional context. In recent years, cryo-electron tomography (cryo-ET) has emerged as a powerful method for visualizing the molecular organization of unperturbed cellular landscapes with the potential to attain near-atomic resolution. Here, we review recent work on several macromolecular assemblies, demonstrating the power of in situ studies. We also highlight technical challenges and discuss ways to meet them.

Publication types

  • Review

MeSH terms

  • Animals
  • Cell Membrane / metabolism
  • Cell Membrane / ultrastructure
  • Cells / ultrastructure*
  • Cryoelectron Microscopy*
  • Electron Microscope Tomography*
  • Humans
  • Proteasome Endopeptidase Complex / metabolism
  • Proteolysis


  • Proteasome Endopeptidase Complex