Function
Part of the ABC transporter complex MlaFEDB, which is involved in a phospholipid transport pathway that maintains lipid asymmetry in the outer membrane by retrograde trafficking of phospholipids from the outer membrane to the inner membrane (PubMed:19383799, PubMed:27529189). MlaB plays critical roles in both the assembly and activity of the complex. May act by modulating MlaF structure and stability (PubMed:27529189).