Part of the high-affinity ABC transporter complex FruEKFG involved in fructose uptake. Can also transport ribose and xylose, with lower affinity. Probably responsible for the translocation of the substrate across the membrane. The complex is composed of an ATP-binding protein (FruK), two transmembrane proteins (FruF and FruG) and a solute-binding protein (FruE). Belongs to the binding-protein-dependent transport system permease family.