title: Genetically-engineered bacteria expressing human enzymes and their use in the study of mutagens and mutagenesis.
abstract: Expression of human enzymes in bacterial cells has made possible the development of a new generation of mutagenicity assays. Metabolic activation takes place within the internal milieu of the target cell, so that no membrane barrier is interposed between the reactive metabolite and the DNA target. This technology has been extended to all major classes of enzymes of xenobiotic biotransformation, including P450. Expression of sequence variants of mutagen-bioactivation enzymes provides a new tool for studying their structure and function.
authors.affiliation: Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ont, Canada N1G 2W1. djosephy@uoguelph.ca
authors.forename: P David
authors.initials: PD
authors.lastname: Josephy
mesh_terms: D001419:Bacteria / Q000235:genetics*; D001711:Biotransformation; D004798:Enzymes / Q000096:biosynthesis*; D005818:Genetic Engineering; D006801:Humans; D016296:Mutagenesis / Q000187:drug effects*; D009153:Mutagens / Q000633:toxicity*; D011487:Protein Conformation; D011994:Recombinant Proteins / Q000378:metabolism; D014116:Toxicology / Q000379:methods
chemical_list: D004798:Enzymes; D009153:Mutagens; D011994:Recombinant Proteins