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Table 4 Excerpt of the background knowledge for protein 1BDG in Prolog

From: Automated identification of protein-ligand interaction features using Inductive Logic Programming: a hexose binding case study

center_coords(p1BDG, p(27.0,22.1,64.9)).

has_aminoacid(p1BDG, a64, phe).

has_aminoacid(p1BDG, a85, leu).

has_aminoacid(p1BDG, a86, gly).

has_aminoacid(p1BDG, a87, gly).

has_atom(p1BDG, a64, ’CD2’, p(22.4,13.3,65.5)).

has_atom(p1BDG, a64, ’CE2’, p(21.6,14.0,66.4)).

has_atom(p1BDG, a85, ’C’, p(24.6,25.9,57.4)).

has_atom(p1BDG, a85, ’O’, p(24.6,24.8,57.8)).

has_atom(p1BDG, a86, ’N’, p(24.8,27.0,58.3)).

has_atom(p1BDG, a86, ’CA’, p(24.9,26.8,59.7)).

  1. Since 1BDG is a hexose-binding protein, center_coords/2 predicate states the coordinates of the hexose binding center. The has_aminoacid and has_atom predicates state the coordinates of the amino acids and atoms in a neighborhood of 10 Ã… of the binding site center.