A computational model for the covalent interstrand DNA cross-linking of the
antitumor agent azinomycin B is reported and is based on Monte Carlo simul
ations of the four possible monoalkylation species and an examination of th
e low energy conformations of the cross-linked agent. The model was develop
ed using a suitably modified version of the AMBER* force field with the exp
erimentally determined triplet DNA target sequence 5'-d(GCT)-3' in both the
native B-form and containing a preformed intercalation site.