Predicted to enable indoleamine 2,3-dioxygenase activity and tryptophan 2,3-dioxygenase activity. Predicted to be involved in 'de novo' NAD biosynthetic process from tryptophan and tryptophan catabolic process to kynurenine. Predicted to be active in cytoplasm. Orthologous to human IDO2 (indoleamine 2,3-dioxygenase 2). [provided by Alliance of Genome Resources, Apr 2022]