Part of the high-affinity ABC transporter complex FruEKFG involved in fructose uptake. Can also transport ribose and xylose, with lower affinity. Binds fructose, ribose and xylose, with fructose as the preferred substrate. The complex is composed of an ATP-binding protein (FruK), two transmembrane proteins (FruF and FruG) and a solute-binding protein (FruE). Induced specifically and reversibly by fructose both in a time- and dose-dependent manner. Also induced by ribose or xylose, but not by glucose. Mutant is unable to grow on fructose as sole carbon source. Belongs to the bacterial solute-binding protein 2 family.