Part of the ABC transporter complex GlnHMPQ involved in glutamine transport. Probably responsible for the translocation of the substrate across the membrane (By similarity). The complex is composed of two ATP-binding proteins (GlnQ), two transmembrane proteins (GlnM and GlnP) and a solute-binding protein (GlnH). Positively regulated by TnrA under nitrogen-limited conditions. Belongs to the binding-protein-dependent transport system permease family.