Probably part of an ABC transporter complex that could be involved in peptide import. Probably responsible for energy coupling to the transport system (By similarity). The complex is composed of two ATP-binding proteins (BruAb2_1033 and BruAb2_1034), two transmembrane proteins (BruAb2_1031 and BruAb2_1032) and a solute-binding protein (BruAb2_1030). Belongs to the ABC transporter superfamily.