Stimulation of glucose catabolism in Escherichia coli by a potential futile cycle.

Abstract excerpt

Fifteen-fold overexpression of phosphoenolpyruvate synthase (Pps) (EC 2.7.9.2) in Escherichia coli stimulated oxygen consumption in glucose minimal medium. A further increase in Pps overexpression to 30-fold stimulated glucose consumption by approximately 2-fold and resulted in an increased excretion of pyruvate and acetate. Insertion of two codons at the PvuII site in the pps gene abolished the enzymatic...

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