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  • Title: Structural analysis of the full-length gene encoding a fibronectin-binding-like protein (CadF) and its adjacent genetic loci within Campylobacter lari.
    Author: Hirayama J, Sekizuka T, Tazumi A, Taneike I, Moore JE, Millar BC, Matsuda M.
    Journal: BMC Microbiol; 2009 Sep 08; 9():192. PubMed ID: 19737389.
    Abstract:
    BACKGROUND: The combined sequences encoding a partial and putative rpsI open reading frame (ORF), non-coding (NC) region, a putative ORF for the Campylobacter adhesin to fibronectin-like protein (cadF), a putative Cla_0387 ORF, NC region and a partial and putative Cla_0388 ORF, were identified in 16 Campylobacter lari isolates, using two novel degenerate primer pairs. Probable consensus sequence at the -35 and -10 regions were identified in all C. lari isolates, as a promoter. RESULTS: Thus, cadF (-like) gene is highly conserved among C. lari organisms. Transcription of the cadF (-like) gene in C. lari cells in vivo was also confirmed and the transcription initiation site was determined. A peptidoglycan-associating alpha-helical motif in the C-terminal regions of some bacterial cell-surface proteins was completely conserved amongst the putative cadF (-like) ORFs from the C. lari isolates. CONCLUSION: The putative cadF (-like) ORFs from all C. lari isolates were nine amino acid larger than those from C. jejuni, and showed amino acid residues 137 -140 of FALG (50% identity), instead of the FRLS residues of the maximal fibronectin-binding activity site demonstrated within C. jejuni CadF. A neighbor joining tree constructed based on cadF (-like) gene sequence information formed a major cluster consisting of C. lari isolates, separating from the other three thermophilic campylobacters.
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