The structure and characteristics of a fourth allele of polymorphic N-acetyltransferase gene found in the Japanese population.
Polymorphic N-acetyltransferase (NAT2), which exists in the human liver and metabolizes a wide spectrum of arylamine, is encoded by one gene (NAT2). We have identified the mutations of a fourth NAT2 allele (allele 4) which we previously found in the Japanese population. Compared with allele 1, which expresses a high enzyme activity, allele 4 has 3 nucleotide differences. 2 are missense mutations at nucleotide position (nt) 341 and 803. The other is a silent mutation at the KpnI site. From the result of expression studies of chimeric gene constructs between allele 1 and allele 4 in Chinese hamster ovary cells, nt 341 missense mutation of the allele 4 which causes the Ile-114 to Thr change is responsible for the low enzyme activity of NAT2 protein.
Abe
M
M
Department of Clinical Genetics, Kyushu University, Oita, Japan.
Deguchi
T
T
Suzuki
T
T
D000483:Alleles; D001191:Arylamine N-Acetyltransferase / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D015153:Blotting, Western; D015870:Gene Expression; D006801:Humans; D007564:Japan / Q000208:ethnology; D008969:Molecular Sequence Data; D009838:Oligodeoxyribonucleotides / Q000737:chemistry; D010375:Pedigree; D012333:RNA, Messenger / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D013329:Structure-Activity Relationship
D009838:Oligodeoxyribonucleotides; D012333:RNA, Messenger; D011993:Recombinant Fusion Proteins; D001191:Arylamine N-Acetyltransferase