title: Studies on the mechanism of DNA sequence selective alkylation by kapurimycin A3 analogs.
abstract: We synthesized kapurimycin A3 ABCD-ring analog and compared the sequence selectivity for DNA guanine alkylation with those of kapurimycin A3 and ABC-ring analog. In the binding to DNA, it was shown by DNA unwinding assay that ABCD-ring analog binds tightly to DNA by intercalation into DNA duplex. DNA alkylation by ABCD-ring analog was sequence selective with an order of G*G > G*A > G*T > G*C. ABCD-ring analog has a stronger binding ability, a higher reactivity to DNA and a higher GG sequence selectivity in DNA alkylation than those to ABC-ring analog. The aromatic ring system plays an important role in the effective GG selective alkylation.
authors.affiliation: Department of Synthetic Chemistry and Biological Chemistry, Faculty of Engineering, Kyoto University, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Okamoto
authors.forename: K
authors.initials: K
authors.lastname: Nakatani
authors.forename: I
authors.initials: I
authors.lastname: Saito
mesh_terms: D000478:Alkylation; D000873:Anthracenes / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000903:Antibiotics, Antineoplastic / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D001483:Base Sequence; D001665:Binding Sites; D004247:DNA / Q000737:chemistry*; D015394:Molecular Structure; D009838:Oligodeoxyribonucleotides / Q000737:chemistry; D011753:Pyrones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000873:Anthracenes; D000903:Antibiotics, Antineoplastic; D009838:Oligodeoxyribonucleotides; D011753:Pyrones; C066903:kapurimycin A3; D004247:DNA