Part of an ABC transporter complex involved in anions import (Probable). Responsible for the translocation of the substrate across the membrane (By similarity). The complex is composed of two ATP-binding proteins (HVO_1886), two transmembrane proteins (HVO_1887) and a solute-binding protein (HVO_1888). Mutation within HVO_1886 or HVO_1887 causes nitrate respiration deficiency. Belongs to the binding-protein-dependent transport system permease family.