Contributes to chloride channel activity. Predicted to be involved in chloride transport. Predicted to act upstream of or within cellular ion homeostasis. Located in basolateral plasma membrane. Is integral component of plasma membrane. Part of protein-containing complex. Is expressed in central nervous system; inner ear; and metanephros. Used to study Bartter disease type 4a. Human ortholog(s) of this gene implicated in Bartter disease; Bartter disease type 4a; and sensorineural hearing loss. Orthologous to human BSND (barttin CLCNK type accessory subunit beta). [provided by Alliance of Genome Resources, Apr 2022]