Predicted to enable DNA-binding transcription factor activity, RNA polymerase II-specific; p53 binding activity; and transcription cis-regulatory region binding activity. Involved in cartilage development; cellular response to nicotine; and pituitary gland development. Predicted to be located in nucleoplasm. Predicted to be part of transcription regulator complex. Predicted to be active in nucleus. Biomarker of cryptorchidism. Human ortholog(s) of this gene implicated in cleft lip; cleft palate; orofacial cleft 5; tooth and nail syndrome; and tooth disease (multiple). Orthologous to human MSX1 (msh homeobox 1). [provided by Alliance of Genome Resources, Apr 2022]