rs72547513

rs72547513, also known as 558C>A or F186L, is a SNP in the CYP1A2 gene. In a CYP database, it is listed as defining the CYP1A2*11 allele. 23andMe and opensnp show A as more common. dbSNP shows C as the reference, and A as the variant, but no population frequency information is provided. This SNP was originally observed in a Japanese population at a frequency of 0.3%; in an Italian study of 500 healthy individuals, it was not observed. claims that A is the variant, and that it defined the CYP1A2*11 allele with a Vmax approximately 5% of that of the CYP1A2 wild type, and reduced enzymatic activity. Two subsequent theoretical studies provide hypotheses for why this change results in lowered activity.,

A;A

also known as F186L, Phe186Leu, c.558C>A, g.32755C>A, g.45833194C>A According to the literature, this is the cause of the CYP1A2*11 homozygote which produces 5% Vmax of the normal enzyme level. However 23andMe data shows that A is more common. in allele CYP1A2*11; drastic reduction in O-deethylation of phenacetin and 7-ethoxyresorufin; has a Vmax of approximately 5% of that of the wild-type and 5-fold lower Km value.

A;C

According to the literature, C is normal and A is rare, however 23andMe data shows that A is more common. At present the consequences remain unclear.