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  • Title: Flagellin gene sequence variation in the genus Pseudomonas.
    Author: Bellingham NF, Morgan JA, Saunders JR, Winstanley C.
    Journal: Syst Appl Microbiol; 2001 Jul; 24(2):157-65. PubMed ID: 11518318.
    Abstract:
    Flagellin gene (fliC) sequences from 18 strains of Pseudomonas sensu stricto representing 8 different species, and 9 representative fliC sequences from other members of the gamma sub-division of proteobacteria, were compared. Analysis was performed on N-terminal, C-terminal and whole fliC sequences. The fliC analyses confirmed the inferred relationship between P. mendocina, P. oleovorans and P. aeruginosa based on 16S rRNA sequence comparisons. In addition, the analyses indicated that P. putida PRS2000 was closely related to P. fluorescens SBW25 and P. fluorescens NCIMB 9046T, but suggested that P. putida PaW8 and P. putida PRS2000 were more closely related to other Pseudomonas spp. than they were to each other. There were a number of inconsistencies in inferred evolutionary relationships between strains, depending on the analysis performed. In particular, whole flagellin gene comparisons often differed from those obtained using N- and C-terminal sequences. However, there were also inconsistencies between the terminal region analyses, suggesting that phylogenetic relationships inferred on the basis of fliC sequence should be treated with caution. Although the central domain of fliC is highly variable between Pseudomonas strains, there was evidence of sequence similarities between the central domains of different Pseudomonas fliC sequences. This indicates the possibility of recombination in the central domain of fliC genes within Pseudomonas species, and between these genes and those from other bacteria.
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