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J. Bacteriol., 05 1995, 2396-2402, Vol 177, No. 9
EK Hani and VL Chan
The basis for the difference between Campylobacter jejuni and Campylobacter
coli is the presence and expression of the N- benzoylglycine amidohydrolase
(hippuricase) gene only in C. jejuni. A pBR322 recombinant clone (pHIP-O)
of C. jejuni TGH9011 capable of converting hippuric acid into benzoic acid
and glycine, the hallmark of hippuricase activity, was characterized and
sequenced. The hippuricase gene (hipO) was identified by use of deletion
subclones and insertional inactivation. The transcription start point of
the hippuricase gene was determined by primer extension analysis. A
hippuricase-specific gene fragment was used to determine the presence of
the gene in Campylobacter species. Maxicell analysis of recombinant plasmid
pHIP-O by sodium dodecyl sulfate-polyacrylamide gel electrophoresis
demonstrated the production of a 42-kDa protein corresponding to the HipO
gene product, in excellent agreement with the predicted molecular mass of
the protein.
Copyright © 1995, American Society for Microbiology
Expression and characterization of Campylobacter jejuni benzoylglycine amidohydrolase (Hippuricase) gene in Escherichia coli
Department of Microbiology, University of Toronto, Ontario, Canada.
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