Enables identical protein binding activity and phenylalanine 4-monooxygenase activity. Predicted to be involved in positive regulation of transcription, DNA-templated. Predicted to act upstream of or within tetrahydrobiopterin biosynthetic process. Located in nucleus. Is expressed in bladder; male associated reproductive structure; testis; and urethra of male. Orthologous to human PCBD2 (pterin-4 alpha-carbinolamine dehydratase 2). [provided by Alliance of Genome Resources, Apr 2022]