Enables glutathione transferase activity and identical protein binding activity. Predicted to be involved in glutathione metabolic process and xenobiotic catabolic process. Predicted to be located in cytosol; intercellular bridge; and plasma membrane. Predicted to be part of protein-containing complex. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; respiratory system; and sensory organ. Human ortholog(s) of this gene implicated in several diseases, including autoimmune disease (multiple); eye disease (multiple); gastrointestinal system cancer (multiple); hematologic cancer (multiple); and lung disease (multiple). Orthologous to several human genes including GSTM1 (glutathione S-transferase mu 1). [provided by Alliance of Genome Resources, Apr 2022]