Efficient characterization of protein secondary structure in terms of screw motions.

@article{Kneller2006EfficientCO,
  title={Efficient characterization of protein secondary structure in terms of screw motions.},
  author={Gerald R. Kneller and Paolo Calligari},
  journal={Acta crystallographica. Section D, Biological crystallography},
  year={2006},
  volume={62 Pt 3},
  pages={
          302-11
        }
}
A simple and efficient method is presented to describe the secondary structure of proteins in terms of orientational distances between consecutive peptide planes and local helix parameters. The method uses quaternion-based superposition fits of the protein peptide planes in conjunction with Chasles' theorem, which states that any rigid-body displacement can be described by a screw motion. The helix parameters are derived from the best superposition of consecutive peptide planes and the ;worst… CONTINUE READING
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