Acts upstream of or within several processes, including monovalent inorganic cation homeostasis; urea transport; and urogenital system development. Located in apical plasma membrane urothelial plaque. Is expressed in several structures, including alimentary system; lung; male reproductive system; notochord; and urinary system. Used to study vesicoureteral reflux. Orthologous to human UPK3A (uroplakin 3A). [provided by Alliance of Genome Resources, Apr 2022]