Abstract
With dihydroxyacetone as the sole source of carbon and energy, constitutively synthesized glycerol kinase of the glp system supported aerobic growth of Klebsiella pneumoniae mutants lacking the inducible dihydroxyacetone kinase of the dha system. Glycerol kinase had an apparent Km of 0.01 mM for its physiological substrate and 1 mM for its surrogate substrate. However, the growth rate on dihydroxyacetone of cells relying on glycerol kinase increased with the concentration of the carbon and energy source up to 50 mM, suggesting that permeation is rate limiting.
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