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Determination of helix orientations in proteins

Paper ID Volume ID Publish Year Pages File Format Full-Text
15480 1416 2008 5 PDF Available
Determination of helix orientations in proteins

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.

CaM, calmodulinProtein structure; Helix orientation; Computational analysis
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Determination of helix orientations in proteins
Database: Elsevier - ScienceDirect
Journal: Computational Biology and Chemistry - Volume 32, Issue 5, October 2008, Pages 370–374
Physical Sciences and Engineering Chemical Engineering Bioengineering