The three‐dimensional structure of the colicin E3 immunity protein by distance geometry calculation

Abstract
The three‐dimensional solution structure of the colicin E3 immunity protein (84 residues) was determined by distance geometry calculations. The hydrophilic side of a four‐stranded antiparallel β‐sheet constitutes a part of the surface of the protein, and two loops lie on the hydrophobic side of the sheet. All the three specificity‐determining residues, which are included in the center of the β‐sheet, display their side groups on the protein surface.