Enables sucrose:proton symporter activity. Acts upstream of or within developmental pigmentation and sucrose transport. Predicted to be integral component of membrane. Predicted to be active in membrane. Is expressed in brain; embryo ectoderm; eye; mesenchyme derived from neural crest; and skin. Used to study oculocutaneous albinism. Human ortholog(s) of this gene implicated in oculocutaneous albinism type IV and pigmentation disease. Orthologous to human SLC45A2 (solute carrier family 45 member 2). [provided by Alliance of Genome Resources, Apr 2022]