TY - JOUR
T1 - Bacteriocins inhibit glucose PEP:PTS activity in Listeria monocytogenes by induced efflux of intracellular metabolites
AU - Waite, B. L.
AU - Hutkins, R. W.
PY - 1998
Y1 - 1998
N2 - Glucose transport by the phosphoenolpyruvate (PEP)-dependent phosphotransferase system (PTS) of Listeria monocytogenes is inhibited by the bacteriocins nisin, pediocin JD and leuconocin S. To investigate the mechanism of inhibition, PTS activity assays were performed with permeabilized, bacteriocin-treated L. monocytogenes Scott A cells. In the presence of exogenous PEP, nisin stimulated the PTS while both pediocin JD and leuconocin S partially inhibited its activity. These results suggested that PTS enzymes were still active in bacteriocin-treated cells and that bacteriocin-induced PEP efflux may be a mechanism for inhibition of the PTS. To verify that PEP did efflux from bacteriocin-treated L. monocytogenes Scott. A cells, intracellular and extracellular PEP were measured by HPLC. All three bacteriocins induced efflux of PEP. Nisin, pediocin JD and leuconocin S also induced efflux of AMP, ADP and ATP. These studies indicate that bacteriocin inhibition of the glucose PEP:PTS in L. monocytogenes is due to efflux of intracellular metabolites, particularly PEP.
AB - Glucose transport by the phosphoenolpyruvate (PEP)-dependent phosphotransferase system (PTS) of Listeria monocytogenes is inhibited by the bacteriocins nisin, pediocin JD and leuconocin S. To investigate the mechanism of inhibition, PTS activity assays were performed with permeabilized, bacteriocin-treated L. monocytogenes Scott A cells. In the presence of exogenous PEP, nisin stimulated the PTS while both pediocin JD and leuconocin S partially inhibited its activity. These results suggested that PTS enzymes were still active in bacteriocin-treated cells and that bacteriocin-induced PEP efflux may be a mechanism for inhibition of the PTS. To verify that PEP did efflux from bacteriocin-treated L. monocytogenes Scott. A cells, intracellular and extracellular PEP were measured by HPLC. All three bacteriocins induced efflux of PEP. Nisin, pediocin JD and leuconocin S also induced efflux of AMP, ADP and ATP. These studies indicate that bacteriocin inhibition of the glucose PEP:PTS in L. monocytogenes is due to efflux of intracellular metabolites, particularly PEP.
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U2 - 10.1046/j.1365-2672.1998.00502.x
DO - 10.1046/j.1365-2672.1998.00502.x
M3 - Article
C2 - 9750302
AN - SCOPUS:0031708535
SN - 1364-5072
VL - 85
SP - 287
EP - 292
JO - Journal of Applied Microbiology
JF - Journal of Applied Microbiology
IS - 2
ER -