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A semi-empirical SCF-MO study on the base-pairing properties of 8-oxopurines: Significance for mutagenicity

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Abstract

C8-Oxidised purines like 7-hydro-8-oxoguanine (8OG) and 7-hydro-8-oxoadenine (8OA) are known as products of oxidative DNA damage. Semiempirical molecular orbital calculations at the PM3 SCF-MO level are used to investigate the base-pairing properties of these bases in an attempt to understand their mutagenic properties. A detailed analysis of the base-pairing properties of these bases leads to an identification of the most probable pairing schemes involved in mutagenic base-mispairing. It is suggested that both bases are capable of inducing transversional as well as transitional mutations via base-mispairing. The results presented are largely in consonance with available experimental reports.
Original languageEnglish
JournalJournal of the Chemical Society. Perkin Transactions 2
Issue numberIssue 3
DOIs
StatePublished - 1997

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