Part of the ABC transporter complex GltIJKL involved in glutamate and aspartate uptake. Probably responsible for the translocation of the substrate across the membrane. (Microbial infection) Probably transports the toxic C-terminal region of CdiA from P.luminescens strain TTO1 across the inner membrane to the cytoplasm, where CdiA has a toxic effect. Toxin transport is strain-specific, mutations in this gene do not confer resistance to several other tested CdiA toxins. The complex is composed of two ATP-binding proteins (GltL), two transmembrane proteins (GltJ and GltK) and a solute-binding protein (GltI). Disruption confers resistance to cellular contact-dependent growth inhibition (CDI) CdiA of P.luminescens strain TTO1, but not to several other tested CdiA toxins. Belongs to the binding-protein-dependent transport system permease family. HisMQ subfamily.