Detoxication of Structurally Diverse Polycyclic Aromatic Hydrocarbon (PAH) o-Quinones by Human Recombinant Catechol-O-methyltransferase (COMT) via O-Methylation of PAH Catechols
作者:Li Zhang、Yi Jin、Mo Chen、Meng Huang、Ronald G. Harvey、Ian A. Blair、Trevor M. Penning
DOI:10.1074/jbc.m111.240739
日期:2011.7
LC-MS/MS showed that each isomer was a mono-O-methylated metabolite. (1)H NMR was used to assign the predominant positional isomer of benzo[a]pyrene-7,8-catechol as the O-8-monomethylated catechol. The catalytic efficiency (k(cat)/K(m)) varied among different classes of PAH-catechols by 500-fold. The ability of S-COMT to produce two isomeric products from PAH-catechols was rationalized using the crystal