CoSS: Created page with "== Citation == Chen, Y.; Pfeffer, S.; Fernández, J. J.; Sorzano, C. O. S. & Förster, F. Autofocused 3D classification of cryoelectron subtomograms. Structure, 2014, 22, 152..."

2015-07-31T06:51:59Z

Created page with "== Citation == Chen, Y.; Pfeffer, S.; Fernández, J. J.; Sorzano, C. O. S. & Förster, F. Autofocused 3D classification of cryoelectron subtomograms. Structure, 2014, 22, 152..."

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== Citation ==

Chen, Y.; Pfeffer, S.; Fernández, J. J.; Sorzano, C. O. S. & Förster, F. Autofocused 3D classification of cryoelectron subtomograms. Structure, 2014, 22, 1528-1537

== Abstract ==

Classification of subtomograms obtained by cryoelectron tomography (cryo-ET) is a powerful approach to study the conformational landscapes of macromolecular complexes in situ. Major challenges in subtomogram classification are the low signal-to-noise ratio (SNR) of cryo-tomograms, their incomplete angular sampling, the unknown number of classes and the typically unbalanced abundances of structurally distinct complexes. Here, we propose a clustering algorithm named AC3D that is based on a similarity measure, which automatically focuses on the areas of major structural discrepancy between respective subtomogram class averages. Furthermore, we incorporate a spherical-harmonics-based fast subtomogram alignment algorithm, which provides a significant speedup. Assessment of our approach on simulated data sets indicates substantially increased classification accuracy of the presented method compared to two state-of-the-art approaches. Application to experimental subtomograms depicting endoplasmic-reticulum-associated ribosomal particles shows that AC3D is well suited to deconvolute the compositional heterogeneity of macromolecular complexes in situ.

== Keywords ==

== Links ==

http://www.ncbi.nlm.nih.gov/pubmed/25242455

== Related software ==

http://pytom.org/doc/pytom/AC3D.html

== Related methods ==

== Comments ==

2014Chen Autofocus - Revision history

CoSS: Created page with "== Citation == Chen, Y.; Pfeffer, S.; Fernández, J. J.; Sorzano, C. O. S. & Förster, F. Autofocused 3D classification of cryoelectron subtomograms. Structure, 2014, 22, 152..."