Volume 82, Issue 10 pp. 2756-2769
Article

Geometrical comparison of two protein structures using Wigner-D functions

S. M. Saberi Fathi

S. M. Saberi Fathi

Department of Physics, Ferdowsi University of Mashhad, Mashhad, Iran

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Diana T. White

Diana T. White

Department of Oncology, University of Alberta, Edmonton, Alberta, Canada

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Jack A. Tuszynski

Corresponding Author

Jack A. Tuszynski

Department of Physics, University of Alberta, Edmonton, Alberta, Canada

Correspondence to: Jack A. Tuszynski, Department of Physics, 4–181 CCIS, University of Alberta, Edmonton, Canada AB T6G 2E1. E-mail: [email protected]Search for more papers by this author
First published: 05 July 2014
Citations: 10

ABSTRACT

In this article, we develop a quantitative comparison method for two arbitrary protein structures. This method uses a root-mean-square deviation characterization and employs a series expansion of the protein's shape function in terms of the Wigner-D functions to define a new criterion, which is called a “similarity value.” We further demonstrate that the expansion coefficients for the shape function obtained with the help of the Wigner-D functions correspond to structure factors. Our method addresses the common problem of comparing two proteins with different numbers of atoms. We illustrate it with a worked example. Proteins 2014; 82:2756–2769. © 2014 Wiley Periodicals, Inc.

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