ABSTRACT
N-acetyltransferase are phase II code proteins with overlapping substrate specifici-DMEs, and two highly similar human NAT gene ty. NAT2 is a polymorphic acetyltransferase gene (designated NAT1 and NAT2) are shown to en- locus and "slow acetylation" in humans is due tonutations in the single coding exon of the NAT2 gene. It was also demonstrated that there exist discrete NAT1 structural variants, and differences in tissue levels of NAT1 among humans are related to specific sequence differences in the NAT1 structural gene. Biochemical studies have shown that NAT1 and NAT2 play an important role in the metabolism of some carcinogens, epidemiological studies have revealed an association between ploy-morphisms of NATs and increased cancer risk.Metabolic phenotypes/genotypes can significantly influence DAN adduct formation and could ultimately lead to alterations in cancer risk. If unequivocal biomarkers of genetic susceptibility to cancer can be developed successfully, then identification of individuals at increased risk would be very helpful in the fields of public health and preventive medicine.
ABSTRACT
Arylamine N-acetyltransferase(NATs)is one of phase Ⅱ drug-metabolizing enzymes,which is very important in drug metabolizing and detoxification.It may become a new target for studying pharmacological effects.The study on NATs is hitherto its crystal structure or polymorphisms among different species,different ethnicity,same species,and same ethnicity.However,the study on its physiological and pharmacological effects is unwontedly reported.In the paper the research work on NATs is summarized from the following aspects:the structure,carcinogenic mechanism,endogenous activities,inhibitor,substitute products,metabolic kinetics,polymorphism and relation with diseases,and detected methods of NATs.