Energetics of lipid transport by the ABC transporter MsbA is lipid dependent

Abstract

Guo et al. conduct a biochemical analysis of the energy dependence of substrate transport by MsbA, an essential ABC lipid transporter in Gram-negative bacteria. The authors examine the flopping of physiologically relevant lipids by MsbA and their differing dependencies on ATP and chemical proton gradient, demonstrating that the energetics of lipid transport by MsbA is lipid dependent.