GSTT2

GSTT2, also known as Glutathione S‑transferase theta 2, is a protein‑coding gene in humans. It encodes an enzyme that belongs to the theta class of the glutathione S‑transferase (GST) superfamily, which plays a critical role in cellular detoxification by catalyzing the conjugation of reduced glutathione (GSH) to a wide array of electrophilic compounds. The GSTT2 protein is predicted to have a dimeric structure, similar to other GSTs, and is localized primarily in the cytosol.

The GSTT2 gene is located on chromosome 1 at the cytogenetic band 1p36.13. It comprises several exons that give rise to a single predominant transcript; alternative splicing events have not been extensively documented. Compared with other theta GSTs such as GSTT1 and GSTT1P, GSTT2 shows distinct substrate specificity, with a higher activity toward sulphatylated and alkylated substrates.

Expression of GSTT2 is tissue‑specific, with the highest levels detected in the liver, lung, and brain. Its expression can be upregulated by exposure to xenobiotics, suggesting a role in the cellular response to oxidative stress. Polymorphisms in the GSTT2 locus have been investigated in relation to susceptibility to chemical carcinogens and neurological disorders, but results remain inconclusive, requiring further large‑scale association studies.

Clinical research indicates that GSTT2 may contribute to drug metabolism and detoxification pathways, potentially influencing individual variability in drug response. Nonetheless, the precise physiological and pathological roles of GSTT2 remain incompletely defined, and ongoing studies aim to delineate its substrate profile, regulation mechanisms, and impact on disease processes.