title: Genotyping of triallelic SNPs using TaqMan PCR.
abstract: Methods for analysis of single nucleotide polymorphisms (SNP) are well developed. However, most ready-made SNP genotyping kits (e.g., those that use TaqMan PCR) are based on the assumption that the SNP is biallelic. Thus, most kits are unsuitable for triallelic SNPs. We have experienced difficulty genotyping an SNP using TaqMan PCR. In the present study, we developed a method of genotyping a triallelic SNP (rs3091244: alleles C, A and T) using TaqMan PCR. We used 2 different genotyping kits: one for C/A allele genotyping, and one for C/T allele genotyping. The results of these 2 kits were combined to complete the genotyping. The subjects were 320 essentially healthy elderly Japanese. The frequencies of the C, A and T alleles were 0.78, 0.155 and 0.065, respectively. This double-tube method using TaqMan SNP Genotyping Assays was very accurate and convenient, and it should be useful for genotyping in case-control association studies or linkage studies.
authors.affiliation: Department of Medicine, Divisions of Neurology, Nihon University School of Medicine, Tokyo, Japan.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Morita
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Nakayama
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Doba
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Hinohara
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Mizutani
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Soma
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D001483:Base Sequence; D004252:DNA Mutational Analysis / Q000379:methods*; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D016133:Polymerase Chain Reaction / Q000379:methods*; D020641:Polymorphism, Single Nucleotide; D011933:Reagent Kits, Diagnostic
chemical_list: D011933:Reagent Kits, Diagnostic