Marked Differences in Base Selectivity between DNA and the Free Nucleotides upon Adduct Formation from Bay- and Fjord-Region Diol Epoxides
作者:SreenivasaRao Vepachedu、Naiqi Ya、Haruhiko Yagi、Jane M. Sayer、Donald M. Jerina
DOI:10.1021/tx000073w
日期:2000.9.1
85% dA adducts on reaction with DNA. With the BaP DEs, 60-77% of the exocyclic amino group adducts formed upon competitive reaction with the freenucleotides are derived from dGMP. The observed dG selectivity of these BaP DEs is much smaller with the nucleotide mixture than it is with DNA, leading to the conclusion that DNA structure has a much larger modifying effect on the baseselectivity of the
The (+)- and (−)-trans-3,4-dihydroxy-3,4-dihydrobenzo[c]phenanthrenes have been resolved and assigned absoluteconfiguration by independent nmr and CD methods. Each was converted to its pair of diastereomeric bay-region 3,4-diol-1,2-epoxides in which the benzylic 4-hydroxyl group is either cis or trans to the epoxide oxygen.