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  Classification and three-dimensional reconstruction of unevenly distributed or symmetry mismatched features of icosahedral particles

Briggs, J. A. G., Huiskonen, J. T., Fernando, K. V., Gilbert, R. J. C., Scotti, P., Butcher, S. J., et al. (2005). Classification and three-dimensional reconstruction of unevenly distributed or symmetry mismatched features of icosahedral particles. Journal of Structural Biology, 150(3), 332-339. doi:10.1016/j.jsb.2005.03.009.

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 Creators:
Briggs, John A. G.1, Author           
Huiskonen, J. T., Author
Fernando, K. V., Author
Gilbert, R. J. C., Author
Scotti, P., Author
Butcher, S. J., Author
Fuller, S. D., Author
Affiliations:
1Wellcome Trust Centre for Human Genetics, University of Oxford, ou_persistent22              

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Free keywords: icosahedral reconstruction symmetry mismatch partial occupancy cryo-electron microscopy virus cryoelectron-microscopy biological macromolecules electron cryomicroscopy image-reconstruction receptor viruses visualization organization micrographs adenovirus Biochemistry & Molecular Biology Biophysics Cell Biology
 Abstract: Methods for the three-dimensional reconstruction of icosahedral particles, such as spherical viruses, from electron micrographs are well established. These methods take advantage of the 60-fold symmetry of the icosahedral group, Several features within these particles, however. may deviate from icosahedral symmetry. Examples include viral genomes, symmetry mismatched vertex proteins, unique DNA packaging vertices, flexible proteins, and proteins that are present at less than 100% occupancy. Such asymmetrically distributed features are smeared in the final density map when icosahedral symmetry is applied. Here. we describe a novel approach to classifying, analysing, and obtaining three-dimensional reconstructions Of Such features, The approach uses the orientation information derived from the icosahedral orientation search to facilitate multivariate statistical analysis and to limit the orientational degrees of freedom for reconstruction. We demonstrate the application of this approach to images of Kelp fly Virus, In this case, each virion may have two different types of fivefold vertex. We use our approach to produce independent reconstructions of the two types of vertex. (c) 2005 Elsevier Inc. All rights reserved.

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Language(s): eng - English
 Dates: 2005
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: Other: WOS:000229351200010
DOI: 10.1016/j.jsb.2005.03.009
ISSN: 1047-8477
 Degree: -

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Title: Journal of Structural Biology
  Alternative Title : J. Struct. Biol.
Source Genre: Journal
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Pages: - Volume / Issue: 150 (3) Sequence Number: - Start / End Page: 332 - 339 Identifier: -