Listeria monocytogenes Scott A transports glucose by high-affinity and low-affinity glucose transport systems

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Abstract

Listeria monocytogenes transported glucose by a high-affinity phosphoenolpyruvate-dependent phosphotransferase system and a low-affinity proton motive force-mediated system. The low-affinity system (K(m) = 2.9 mM) was inhibited by 2-deoxyglucose and 6-deoxyglucose, whereas the high-affinity system (K(m) = 0.11 mM) was inhibited by 2-deoxyglucose and mannose but not 6-deoxyglucose. Cells and vesicles artificially energized with valinomycin transported glucose or 2-deoxyglucose at rates greater than those of de- energized cells, indicating that a membrane potential could drive uptake by the low-affinity system.

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Parker, C., & Hutkins, R. W. (1997). Listeria monocytogenes Scott A transports glucose by high-affinity and low-affinity glucose transport systems. Applied and Environmental Microbiology, 63(2), 543–546. https://doi.org/10.1128/aem.63.2.543-546.1997

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