Enables protein domain specific binding activity. Involved in several processes, including response to estradiol; response to fructose; and sodium-dependent phosphate transport. Located in apical plasma membrane; brush border membrane; and microvillus membrane. Human ortholog(s) of this gene implicated in pulmonary alveolar microlithiasis. Orthologous to human SLC34A2 (solute carrier family 34 member 2). [provided by Alliance of Genome Resources, Apr 2022]