Multidrug resistance (MDR) poses a major challenge to medicine. A principle cause of MDR is through active efflux by MDR transporters situated in the bacterial membrane. Here we present the crystal structure of the major facilitator superfamily (MFS) ...
Multidrug resistance (MDR) poses a major challenge to medicine. A principle cause of MDR is through active efflux by MDR transporters situated in the bacterial membrane. Here we present the crystal structure of the major facilitator superfamily (MFS) drug/H + antiporter MdfA from Escherichia coli in an outward open conformation. Comparison with the inward facing (drug binding) state shows that, in addition to the expected change in relative orientations of the N- and C-terminal lobes of the antiporter, the conformation of TM5 is kinked and twisted. In vitro reconstitution experiments demonstrate the importance of selected residues for transport and molecular dynamics simulations are used to gain insights into antiporter switching. With the availability of structures of alternative conformational states, we anticipate that MdfA will serve as a model system for understanding drug efflux in MFS MDR antiporters.
Related Citations:
The multidrug-resistance transporter MdfA from Escherichia coli: crystallization and X-ray diffraction analysis. Nagarathinam, K.,Jaenecke, F.,Nakada-Nakura, Y.,Hotta, Y.,Liu, K.,Iwata, S.,Stubbs, M.T.,Nomura, N.,Tanabe, M. (2017) Acta Crystallogr F Struct Biol Commun 73: 423
Organizational Affiliation:
ZIK HALOmem, Kurt-Mothes-Straße 3, D-06120, Halle/Saale, Germany. mikio.tanabe@kek.jp.,Agricultural Bioinformatics Research Unit, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.,ZIK HALOmem, Kurt-Mothes-Straße 3, D-06120, Halle/Saale, Germany.,Structural Biology Research Center, Institute of Materials Structure Science, KEK/High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki, 305-0801, Japan. mikio.tanabe@kek.jp.,Institute of Virology, Hannover Medical School, Carl-Neuberg-Straße 1, D-30625, Hannover, Germany.,Department of Cell Biology, Graduate School of Medicine, Kyoto University, Konoe-cho, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan.,Institut für Biochemie und Biotechnologie, Charles-Tanford-Proteinzentrum, Martin-Luther Universität Halle-Wittenberg, Kurt-Mothes-Straße 3a, D-06120, Halle/Saale, Germany.,Department of Membrane Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 1-1-1 Kita-ku, Tsushima-naka, Okayama, 700-8530, Japan.,Advanced Science Research Center, Okayama University, 1-1-1 Kita-ku, Tsushima-naka, Okayama, 700-8530, Japan.,Institut für Biochemie und Biotechnologie, Charles-Tanford-Proteinzentrum, Martin-Luther Universität Halle-Wittenberg, Kurt-Mothes-Straße 3a, D-06120, Halle/Saale, Germany. stubbs@biochemtech.uni-halle.de.,ZIK HALOmem, Kurt-Mothes-Straße 3, D-06120, Halle/Saale, Germany. stubbs@biochemtech.uni-halle.de.,RIKEN, SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan.
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