Determination of helix orientations in proteins

    Authors

    S. A. Tatulian

    Comments

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    Abbreviated Journal Title

    Comput. Biol. Chem.

    Keywords

    Protein structure; Helix orientation; Computational analysis; MEMBRANE-PROTEINS; PACKING; AXIS; PREFERENCES; CALMODULIN; PROGRAM; MOTIFS; ANGLE; Biology; Computer Science, Interdisciplinary Applications

    Abstract

    Accurate description of helices, including Curvature and bending, and determination of interhelical angles are essential for analysis of the three-dimensional fold and functionally important conformational changes in helical proteins. Here, a new computational method is presented that allows determination of angles between any helical stretches,the radius of curvature of curved helices, bending angle of bent helices, as well as symmetry relations within the protein molecule, using main chain atom coordinates. The method has been applied to describe changes in interhelical angles in calmodulin upon interaction with a target peptide, which reveals the conformational changes at a higher precision. Because subtle changes in helix-to-helix packing and interhelical angles often underlie significant functional transitions in proteins, this approach can serve as a useful tool for Characterization of such conformational changes at an exceedingly high accuracy and thus provide detailed insight into the structure-function relationship of proteins. (c) 2008 Elsevier Ltd. All rights reserved.

    Journal Title

    Computational Biology and Chemistry

    Volume

    32

    Issue/Number

    5

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    370

    Last Page

    374

    WOS Identifier

    WOS:000260110700009

    ISSN

    1476-9271

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