alexa Functional polymorphism of human glutathione transferase A2.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Pharmacological Reports

Author(s): Tetlow N, Board PG

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Abstract OBJECTIVES: Single nucleotide polymorphisms that cause amino acid substitutions in enzymes involved in the metabolism of xenobiotics can potentially have a significant effect on the efficacy and safety of therapeutic drugs. METHODS: We have utilized a bioinformatic approach to identify new polymorphisms in the glutathione transferase super family. RESULTS AND CONCLUSIONS: In this report we describe a P110S polymorphism in GSTA2 that occurs at a low frequency in Africans, Chinese and Europeans. The serine containing isoform has significantly diminished activity with a range of substrates including, delta-Androsten-3,17-dione, 1-chloro-2,4-dinitrobenzene and cumene hydroperoxide. The activity with cumene hydroperoxide may reflect a diminished physiological function since the glutathione peroxidase activity of GSTA2-2 plays a role in prostaglandin synthesis. In contrast, activity with p-nitrophenol acetate was significantly elevated. The position of this polymorphism in the active site and its effects on model substrates suggest that further investigation of its capacity to conjugate alkylating drugs is warranted.
This article was published in Pharmacogenetics and referenced in Journal of Pharmacological Reports

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