Cryo-EM structure of haemoglobin at 3.2 angstrom determined with the Volta phase plate.Khoshouei, M., Radjainia, M., Baumeister, W., Danev, R.
(2017) Nat Commun 8: 16099-16099
- PubMed: 28665412
- DOI: 10.1038/ncomms16099
- PubMed Abstract:
- Cryo-EM single particle analysis with the Volta phase plate.
Danev, R.,Baumeister, W.
(2016) Elife 5: --
With the advent of direct electron detectors, the perspectives of cryo-electron microscopy (cryo-EM) have changed in a profound way. These cameras are superior to previous detectors in coping with the intrinsically low contrast and beam-induced motio ...
With the advent of direct electron detectors, the perspectives of cryo-electron microscopy (cryo-EM) have changed in a profound way. These cameras are superior to previous detectors in coping with the intrinsically low contrast and beam-induced motion of radiation-sensitive organic materials embedded in amorphous ice, and hence they have enabled the structure determination of many macromolecular assemblies to atomic or near-atomic resolution. Nevertheless, there are still limitations and one of them is the size of the target structure. Here, we report the use of a Volta phase plate in determining the structure of human haemoglobin (64 kDa) at 3.2 Å. Our results demonstrate that this method can be applied to complexes that are significantly smaller than those previously studied by conventional defocus-based approaches. Cryo-EM is now close to becoming a fast and cost-effective alternative to crystallography for high-resolution protein structure determination.
The Clive and Vera Ramaciotti Centre for Cryo-EM, Department of Biochemistry and Molecular Biology, Monash University, Victoria, 3800 Melbourne, Australia.,Department of Molecular Structural Biology, Max Planck Institute of Biochemistry, 82152 Martinsried, Germany.