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. 1990 Mar;172(3):1256–1261. doi: 10.1128/jb.172.3.1256-1261.1990

Cloning, nucleotide sequence, and expression in Escherichia coli of the phospholipase D gene from Corynebacterium pseudotuberculosis.

A L Hodgson 1, P Bird 1, I T Nisbet 1
PMCID: PMC208591  PMID: 2407718

Abstract

The phospholipase D (PLD) gene from Corynebacterium pseudotuberculosis has been cloned, sequenced, and expressed in Escherichia coli. Analysis of DNA sequence data reveals a major open reading frame encoding a 31.4-kilodalton protein, a size consistent with that estimated for the PLD protein by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Comparison of these data with the amino-terminal protein sequence indicates that the mature PLD protein is preceded by a 24-residue signal sequence. Expression of the PLD gene in E. coli is initiated from the corynebacterial promoter, and the resulting protein has sphingomyelinase activity. Primer extension mapping localized the 5' end of the PLD gene mRNA to a site 5 to 7 base pairs downstream of a region similar to the consensus sequence for E. coli promoters. Northern and Southern blot analyses suggest that the gene is transcribed from mRNA approximately 1.1 kilobases in length and that it is present in a single copy within the C. pseudotuberculosis genome.

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Selected References

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