Abstract
Abstract We investigate the total binding energy and many-body components in the recognition of guanine (G)–cytosine (C) base pair by asparagine residue (N). There are two possible bridged recognition structures for GCN trimers; one is in the major groove and the other is in the minor groove. The hydrogen-bonding pattern is the same for both trimers, while the binding energies and the components are significantly different. Three-body interaction energy depends on the binding site of N on GC pair. The difference in the relative direction between the dipole moments of GC base pair and N may partly account for the difference in the two-body interaction energies of the trimers.
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