A method for the alignment of heterogeneous macromolecules from electron microscopy.
A method for the alignment of heterogeneous macromolecules from electron microscopy.
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DOI:
10.1016/j.jsb.2008.12.008
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发表时间:
2009-04
影响因子:
3
通讯作者:
Glaeser, Robert M.
中科院分区:
文献类型:
--
作者:
Shatsky, Maxim;Hall, Richard J.;Brenner, Steven E.;Glaeser, Robert M.
We propose a feature-based image alignment method for single-particle electron microscopy that is able to accommodate various similarity scoring functions while efficiently sampling the two-dimensional transformational space. We use this image alignment method to evaluate the performance of a scoring function that is based on the Mutual Information (MI) of two images rather than one that is based on the cross-correlation function. We show that alignment using MI for the scoring function has far less model-dependent bias than is found with cross-correlation based alignment. We also demonstrate that MI improves the alignment of some types of heterogeneous data, provided that the signal to noise ratio is relatively high. These results indicate, therefore, that use of MI as the scoring function is well suited for the alignment of class-averages computed from single particle images. Our method is tested on data from three model structures and one real dataset.
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通讯作者:
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DOI:
10.1364/josaa.7.000601
发表时间:
1990-04-01
影响因子:
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