Part of the ABC transporter complex AraNPQ involved in the uptake of arabinooligosaccharides (By similarity). AraN captures the substrate and delivers it to the two transmembrane components (By similarity). The complex is composed of two ATP-binding proteins (MsmX), two transmembrane proteins (AraP and AraQ) and a solute-binding protein (AraN). Belongs to the bacterial solute-binding protein 1 family.