Enables sodium:iodide symporter activity. Predicted to be involved in iodide transmembrane transport and sodium ion transport. Predicted to act upstream of or within ion transport. Predicted to be located in nucleus. Predicted to be active in plasma membrane. Is expressed in axial skeleton tail region; stomach; testis; and thyroid gland. Human ortholog(s) of this gene implicated in congenital hypothyroidism and thyroid dyshormonogenesis 1. Orthologous to human SLC5A5 (solute carrier family 5 member 5). [provided by Alliance of Genome Resources, Apr 2022]