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Open Access Publications from the University of California

Finding Alpha-Helices in Skeletons

  • Author(s): Amenta, Nina
  • Choi, Sunghee
  • Jump, Maria E.
  • Kolluri, Ravi Krishna
  • Wahl, Thomas
  • et al.

We consider a problem which is part of the process of determining the three-dimensional structure of a protein molecule using X-ray crystallography: given an estimated map of the electron density of the molecule as a function on three-dimensional space, we identify regions which are likely to belong to a-helices. Our approach is to compute a new kind of skeleton - the power shape - and then identify the helical substructures within the power shape with a variant of geometric hashing.

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