| Hybrid distance geometry/simulated annealing using the program DGII, followed by molecular dynamics using the program AMBER, in conjunction not only with distance and dihedral angle restraints, but also 1H chemical shift-based restraints. |
Structures are based on a total of 80 (including 26 intra-residue, 15 sequential, 6 medium-range, and 33 long-range) NOE-derived distance restraints, 15 dihedral angle restraints, and 1H chemical shift restraints for 39 carbon-bound 1H resonances; (chemical shift restraints were not imposed for the terminal residues, or for side chains exhibiting evidence of rotational averaging). The ensemble agrees well with the experimental restraints with no distance or dihedral angle violations greater than 0.10 angstrom or 5 deg, respectively, and an average rmsd of only 0.087 ppm between observed and calculated chemical shifts. |
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