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J Bacteriol. 1990 May; 172(5): 2245-2249

research-article

Overproduction of acetate kinase activates the phosphate regulon in the absence of the phoR and phoM functions in Escherichia coli.

Department of Experimental Chemotherapy, Osaka University, Japan.

ABSTRACT

A DNA fragment of Escherichia coli cloned on pBR322 elevated the production of alkaline phosphatase and phosphate-binding protein in a phoR phoM strain. Nucleotide sequence analysis and enzyme assays revealed that the DNA fragment contained the ackA gene, which codes for acetate kinase. A high gene dosage of ackA was needed to induce the production of alkaline phosphatase and phosphate-binding protein in this strain. Overexpression of ackA elevated the intracellular ATP concentration, an effect that might be related to activation of the phosphate regulon in the phoR phoM strain.

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