Random conical tilt reconstruction without particle picking in cryo-electron microscopy
- 24 June 2022
- journal article
- research article
- Published by International Union of Crystallography (IUCr) in Acta Crystallographica Section A Foundations and Advances
- Vol. 78 (4), 294-301
- https://doi.org/10.1107/s2053273322005071
Abstract
A method is proposed to reconstruct the 3D molecular structure from micrographs collected at just one sample tilt angle in the random conical tilt scheme in cryo-electron microscopy. The method uses autocorrelation analysis on the micrographs to estimate features of the molecule which are invariant under certain nuisance parameters such as the positions of molecular projections in the micrographs. This enables the molecular structure to be reconstructed directly from micrographs, completely circumventing the need for particle picking. Reconstructions are demonstrated with simulated data and the effect of the missing-cone region is investigated. These results show promise to reduce the size limit for single-particle reconstruction in cryo-electron microscopy.Keywords
Funding Information
- Air Force Office of Scientific Research (FA9550-17-1-0291, FA9550-20-1-0266)
- Simons Foundation
- Moore Family Foundation
- National Science Foundation (IIS-1837992, DMS-2009753)
- National Institutes of Health (R01GM136780-01)
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