Overproduction of acetate kinase activates the phosphate regulon in the absence of the phoR and phoM functions in Escherichia coli
- PMID: 2158965
- PMCID: PMC208855
- DOI: 10.1128/jb.172.5.2245-2249.1990
Overproduction of acetate kinase activates the phosphate regulon in the absence of the phoR and phoM functions in Escherichia coli
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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