Cloning, sequencing, and expression of the pantothenate kinase (coaA) gene of Escherichia coli.

Article Details

Citation

Song WJ, Jackowski S

Cloning, sequencing, and expression of the pantothenate kinase (coaA) gene of Escherichia coli.

J Bacteriol. 1992 Oct;174(20):6411-7.

PubMed ID
1328157 [ View in PubMed
]
Abstract

Pantothenate kinase catalyzes the rate-controlling step in coenzyme A (CoA) biosynthesis. The structural gene (coaA) located at 90 min of the Escherichia coli chromosome was cloned and sequenced. The coaA gene was transcribed in the opposite direction to the flanking genes birA and thrU and produced a single 1.1-kb transcript. Translation of the coaA gene produced two protein products (36.4 and 35.4 kDa) that differed by eight amino acids at the amino terminus. The poor homology of the coaA promoter region to consensus E. coli promoter sequences and the low frequency of optimal codon usage (0.565) were consistent with the low abundance of pantothenate kinase. Strains containing multiple copies of the coaA gene possessed 76-fold-higher specific activity of pantothenate kinase; however, there was only a 2.7-fold increase in the steady-state level of CoA. These data corroborate the conclusion that regulation of pantothenate kinase activity by feedback inhibition is the critical factor controlling the intracellular CoA concentration.

DrugBank Data that Cites this Article

Polypeptides
NameUniProt ID
Pantothenate kinaseP0A6I3Details
Bifunctional ligase/repressor BirAP06709Details