Journal Article

The gene encoding xylulose-5-phosphate/fructose-6-phosphate phosphoketolase (<i>xfp</i>) is conserved among <i>Bifidobacterium</i> species within a more variable region of the genome and both are useful for strain identification

Xianhua Yin, James R. Chambers, Kathleen Barlow, Aaron S. Park and Roger Wheatcroft

in FEMS Microbiology Letters

Volume 246, issue 2, pages 251-257
Published in print May 2005 |
Published online January 2006 | e-ISSN: 1574-6968 | DOI:

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The nucleotide sequence of the xfp-gene region in six known and two unknown species of Bifidobacterium was determined and compared with the published sequences of B. animalis subsp. lactis DSM10140 and B. longum biovar longum NCC2705. The xfp coding sequences were 73% identical and coded for 825 amino acids in all 10 sequences. Partial sequences of an adjacent gene, guaA, were 61% identical in six sequences for which data were available. The region between xfp and guaA was variable in both length and sequence. Oligonucleotide sequences from the conserved and variable xfp regions were used as PCR primers, in combinations of appropriate specificity, for the detection and identification of Bifidobacterium isolates.

Keywords: Bifidobacterium; Phosphoketolase; xfp; Strain identification; Detection

Journal Article.  2975 words.  Illustrated.

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