27142164, Microb Cell Fact. 2016 May 3;15:72. doi: 10.1186/s12934-016-0473-z.

Characterization method

high performance anion exchange chromatography,enzyme activity assay,RNA-Seq

Genomic accession number


Nucelotide position range







Lactobacillus rossiae/231049

Degradation or Biosynthesis


Cluster number


Gene name

Gene position

Gene type

Found by CGCFinder?

- 17309 - 17869 (+) CDS No
- 17975 - 19030 (-) CDS No
- 19124 - 20752 (-) CAZyme: GH43_11|GH43 Yes
- 20799 - 22259 (-) TC: gnl|TC-DB|P94488|2.A.2.3.2 Yes
- 22394 - 23788 (-) TC: gnl|TC-DB|O52733|2.A.1.1.41 Yes
- 24177 - 25517 (+) CDS No
- 25652 - 27154 (+) CDS No




27142164, Microb Cell Fact. 2016 May 3;15:72. doi: 10.1186/s12934-016-0473-z.


Cloning, expression and characterization of a beta-D-xylosidase from Lactobacillus rossiae DSM 15814(T).


Pontonio E, Mahony J, Di Cagno R, O'Connell Motherway M, Lugli GA, O'Callaghan A, De Angelis M, Ventura M, Gobbetti M, van Sinderen D


BACKGROUND: Among the oligosaccharides that may positively affect the gut microbiota, xylo-oligosaccharides (XOS) and arabinoxylan oligosaccharides (AXOS) possess promising functional properties. Ingestion of XOS has been reported to contribute to anti-oxidant, anti-bacterial, immune-modulatory and anti-diabetic activities. Because of the structural complexity and chemical heterogeneity, complete degradation of xylan-containing plant polymers requires the synergistic activity of several enzymes. Endo-xylanases and beta-D-xylosidases, collectively termed xylanases, represent the two key enzymes responsible for the sequential hydrolysis of xylan. Xylanase cocktails are used on an industrial scale for biotechnological purposes. Lactobacillus rossiae DSM 15814(T) can utilize an extensive set of carbon sources, an ability that is likely to contribute to its adaptive ability. In this study, the capacity of this strain to utilize XOS, xylan, D-xylose and L-arabinose was investigated. RESULTS: Genomic and transcriptomic analyses revealed the presence of two gene clusters, designated xyl and ara, encoding proteins predicted to be responsible for XOS uptake and hydrolysis and D-xylose utilization, and L-arabinose metabolism, respectively. The deduced amino acid sequence of one of the genes of the xyl gene cluster, LROS_1108 (designated here as xylA), shows high similarity to (predicted) beta-D-xylosidases encoded by various lactic acid bacteria, and belongs to glycosyl hydrolase family 43. Heterologously expressed XylA was shown to completely hydrolyse XOS to xylose and showed optimal activity at pH 6.0 and 40 degrees C. Furthermore, beta-D-xylosidase activity of L. rossiae DSM 15814(T) was also measured under sourdough conditions. CONCLUSIONS: This study highlights the ability of L. rossiae DSM 15814(T) to utilize XOS, which is a very useful trait when selecting starters with specific metabolic performances for sourdough fermentation or as probiotics.