Enables glutathione transferase activity. Acts upstream of or within glutathione metabolic process. Predicted to be located in mitochondrion; nucleus; and plasma membrane. Predicted to be part of TRAF2-GSTP1 complex. Predicted to be active in cytosol. Is expressed in several structures, including alimentary system; cranium; eye; heart; and nervous system. Human ortholog(s) of this gene implicated in several diseases, including brain disease (multiple); carcinoma (multiple); hematologic cancer (multiple); reproductive organ cancer (multiple); and respiratory system disease (multiple). Orthologous to human GSTP1 (glutathione S-transferase pi 1). [provided by Alliance of Genome Resources, Apr 2022]