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The ribosome at improved resolution: New techniques for merging and orientation refinement in 3D cryo-electron microscopy of biological particles

Authors
Journal
Ultramicroscopy
0304-3991
Publisher
Elsevier
Publication Date
Volume
53
Issue
3
Identifiers
DOI: 10.1016/0304-3991(94)90038-8
Disciplines
  • Biology

Abstract

Abstract Cryo-electron microscopy of single biological particles opens up new possibilities for structure analysis: the particle can be reconstructed in its native shape and internal features are preserved. To take advantage of these possibilities we have developed new methods of data collection and image processing and we have applied them to the 70S Escherichia coli ribosome. A method of orientation search is proposed, which makes it possible to relate random-conical data sets to one another even if they are collected from low-tilt micrographs. A technique for 3D alignment of projections is described and applied to the single-micrograph 3D reconstruction.

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