EC Number   |
Protein Variants   |
Reference   |
|---|
 2.1.1.67 | A80P |
238G>C sequence variant of the TPMT gene, location exon 5, amino acid change A80P |
686157 |
 2.1.1.67 | K119T |
356A>C sequence variant of the TPMT gene, location exon 5, amino acid change K119T |
686157 |
 2.1.1.67 | S125L |
374C>T sequence variant of the TPMT gene, location exon 6, amino acid change S125L |
686157 |
 2.1.1.67 | A154T |
460G>A sequence variant of the TPMT gene, location exon 7, amino acid change A154T |
686157 |
 2.1.1.67 | Y240C |
719A>G sequence variant of the TPMT gene, location exon 10, amino acid change Y240C |
686157 |
 2.1.1.67 | more |
at least 23 single nucleotide polymorphisms in the TPMT gene have been identified that are associated with decreased or absent TPMT activity |
686505 |
 2.1.1.67 | more |
genetic polymorphisms of thiopurine methyltransferase are responsible for the variable expression of enzyme activity translating into variable efficacy and toxicity |
686328 |
 2.1.1.67 | more |
more than 20 variant alleles leading to deficient methylation phenotype have been described, four of them, TPMT*2, TPMT*3A, TPMT*3B and TPMT*3C, account for 80-95% of low activity alleles in various populations |
689274 |
 2.1.1.67 | A154T |
mutant shows decreased TPMT activity |
706092 |
 2.1.1.67 | A154T/Y240C |
mutant shows decreased TPMT activity |
706092 |