Molecular basis for inhibition of AcrB multidrug efflux pump by novel and powerful pyranopyridine derivatives


AcrB is the major efflux protein of Escherichia coli driven by proton motive force. Along with TolC membrane channel, AcrB participate in extruding number of antimicrobial agents out of cell resulting multi drug resistance. The natural function of the this protein involves pumping out of bile salts and their derivatives to survive in the presence of the high concentrations of these detergents in the natural habitat of E. coli. Numerous studies have been carried out to study the structure to gain insights for designing and discovering drugs to inhibit AcrB.  

Protomer structure of AcrB, composed of 3 domains Page 1
Side view of Pore and TolC docking domains Page 2
Structure related to the function of AcrB Page 3
Residues interacting with Monocyclinin Page 4
Residues interacting with Doxorubicin Page 5
Residues interacting with MBX2931 Page 6
Comparison of Monocyclin and MBX2931 to binding pocket Page 7