Enables protein homodimerization activity. Predicted to be involved in endoplasmic reticulum to Golgi vesicle-mediated transport and intracellular signal transduction. Located in perinuclear region of cytoplasm. Is expressed in cap mesenchyme; ovary; and renal interstitium. Orthologous to human NRBP1 (nuclear receptor binding protein 1). [provided by Alliance of Genome Resources, Apr 2022]