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Cloning, sequencing and expression of full‐length Campylobacter invasion antigen B gene operon from Campylobacter lari
Author(s) -
Onozato Junnosuke,
Kumagai Atsuko,
Sekizuka Tsuyoshi,
Tazumi Akihiro,
Moore John E.,
Millar B. Cherie,
Matsuda Motoo
Publication year - 2009
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.200800214
Subject(s) - biology , open reading frame , campylobacter jejuni , genetics , campylobacter , microbiology and biotechnology , gene , operon , amplicon , start codon , escherichia coli , polymerase chain reaction , bacteria , peptide sequence , nucleotide
A novel PCR primer pair for amplification of full‐length cia B gene from thermophilic campylobacters, generated an amplicon of approximately 2.2 kilo base pairs (kbp) with all 18 isolates ( n = 7 for urease‐negative (UN) C. lari ; n = 9 urease‐positive thermophilic Campylobacter (UPTC); n = 1 C. jejuni ; n = 1 C. coli ). The putative open reading frame (ORF) of the cia B from C. lari isolates consisted of 1,833 bp similarly, but differing from those of C. jejuni and C. coli isolates. The putative promoter structures consisting of a semi‐conserved T ‐rich sequence and a consensus sequence at the –10 region were identified upstream of the putative ORF in all the C. lari isolates. A start codon ATG and a probable ribosome binding site were also identified in all the isolates. In addition, two distinctly different and taxon (UN C. lari and UPTC) dependent hypothetically intrinsic ρ ‐independent transcriptional terminators for the cia B were identified to occur within the C. lari . Reverse transcription–PCR analysis identified the transcription of cia B gene in the C. lari cells. The neighbor joining tree suggested that the nucleotide sequence information of the cia B had molecular discrimination efficacy among UN C. lari , UPTC, C. jejuni and C. coli organisms. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)