Enables sucrose:proton symporter activity. Involved in positive regulation of fatty acid biosynthetic process; positive regulation of glucose metabolic process; and regulation of oligodendrocyte differentiation. Acts upstream of or within sucrose transport. Predicted to be integral component of membrane. Predicted to be active in membrane. Is expressed in several structures, including alimentary system; genitourinary system; liver and biliary system; nervous system; and sensory organ. Orthologous to human SLC45A3 (solute carrier family 45 member 3). [provided by Alliance of Genome Resources, Apr 2022]