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Glycerol andl-α-Glycerol-3-phosphate uptake bypseudomonas aeruginosa

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Abstract

Uptake activities for both glycerol andl-α-glycerol-3-phosphate inPseudomonas aeruginosa strain PAO were induced during growth in the presence of either glycerol ordl-α-glycerol-3-phosphate. Succinate, malate, and glucose exerted catabolite repression control over induction of both uptake activities. Glycerol uptake exhibited saturation kinetics with an apparentK m of 13 μM and aV max of 73 nmol/min/mg cell protein. The uptake ofl-α-glycerol-3-phosphate was inhibited by the presence of glycerol, but uptake of glycerol was unaffected by exogenousl-α-glycerol-3-phosphate. Uptake of both substrates by starved, induced cells was stimulated by exogenously providedd-glucose, 2-deoxy-d-glucose,d-gluconate, orl-malate. In a mutant deficient in gluconate uptake and glucose dehydrogenase (EC 1.1.1.47) activities,d-glucose, 2-deoxy-d-glucose, andd-gluconate exerted little or no effect on the uptake of either substrate, butl-malate markedly stimulated the processes. The uptake of both glycerol andl-α-glycerol-3-phosphate, by either starved or unstarved cells, was inhibited by a number of metabolic poisons, including arsenate, azide, cyanide, 2,4-dinitrophenol, and iodoacetate.

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Authors and Affiliations

  1. Department of Microbiology, Medical College of Virginia, Virginia Commonwealth University, 23298, Richmond, Virginia, USA

    L. S. Siegel & Paul V. Phibbs Jr.

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  1. L. S. Siegel
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  2. Paul V. Phibbs Jr.
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Siegel, L.S., Phibbs, P.V. Glycerol andl-α-Glycerol-3-phosphate uptake bypseudomonas aeruginosa . Current Microbiology 2, 251–256 (1979). https://doi.org/10.1007/BF02601722

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