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J. Bacteriol., May 1995, 2259-2264, Vol 177, No. 9
SF Park and PT Richardson
A genomic library of Campylobacter jejuni (NCTC 11351) was used to identify
genes which could confer a hemolytic phenotype to Escherichia coli.
Accordingly, when transformants were screened on blood plates, hemolytic
colonies appeared at a frequency of 3 x 10(-4). The gene conferring the
hemolytic activity was identified by subcloning and was found to be
responsible for the phenotype of all hemolytic transformants isolated. The
open reading frame conferring this activity encodes a protein of 36,244 Da
with a typical endopeptidase type II leader sequence. The protein is
modified with palmitic acid when it is processed in E. coli, confirming
that it is a typical lipoprotein. The deduced gene product of 329 amino
acids has significant homology to the group of solute binding proteins from
periplasmic-binding-protein- dependent transport systems for ferric
siderophores, including the FatB protein from Vibrio anguillarium and the
FhuD protein from Bacillus subtilis. In particular, the protein contained
the signature sequence for siderophore-binding proteins, suggesting that
the protein may be the siderophore-binding protein component of an iron
acquisition system of C. jejuni.
Copyright © 1995, American Society for Microbiology
Molecular characterization of a Campylobacter jejuni lipoprotein with homology to periplasmic siderophore-binding proteins
Institute of Food Research, Reading Laboratory, United Kingdom.
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