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Open AccessArticle

Metabolic Profiling of Xylooligosaccharides by Lactobacilli

1
Department of Biochemistry and Microbiology, Plovdiv University, 4000 Plovdiv, Bulgaria
2
Centre of Technologies, Plovdiv University, 4000 Plovdiv, Bulgaria
3
Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
4
Department of General and Applied Microbiology, Sofia University, 1164 Sofia, Bulgaria
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(10), 2387; https://doi.org/10.3390/polym12102387
Received: 16 September 2020 / Revised: 11 October 2020 / Accepted: 14 October 2020 / Published: 16 October 2020
Three lactic acid bacteria (LAB) strains identified as Lactobacillus plantarum, Lactobacillus brevis, and Lactobacillus sakei isolated from meat products were tested for their ability to utilize and grow on xylooligosaccharides (XOSs). The extent of carbohydrate utilization by the studied strains was analyzed by HPLC. All three strains showed preferences for the degree of polymerization (DP). The added oligosaccharides induced the LAB to form end-products of typical mixed-acid fermentation. The utilization of XOSs by the microorganisms requires the action of three important enzymes: β-xylosidase (EC 3.2.1.37) exo-oligoxylanase (EC 3.2.1.156) and α-L-arabinofuranosidase (EC 3.2.1.55). The presence of intracellular β-D-xylosidase in Lb. brevis, Lb. plantarum, and Lb. sakei suggest that XOSs might be the first imported into the cell by oligosaccharide transporters, followed by their degradation to xylose. The studies on the influence of XOS intake on the lipids of rat liver plasma membranes showed that oligosaccharides display various beneficial effects for the host organism, which are probably specific for each type of prebiotic used. The utilization of different types of oligosaccharides may help to explain the ability of Lactobacillus strains to compete with other bacteria in the ecosystem of the human gastrointestinal tract. View Full-Text
Keywords: xylooligosaccharide utilization; prebiotics; lactobacilli; liver membrane phospholipids xylooligosaccharide utilization; prebiotics; lactobacilli; liver membrane phospholipids
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Iliev, I.; Vasileva, T.; Bivolarski, V.; Momchilova, A.; Ivanova, I. Metabolic Profiling of Xylooligosaccharides by Lactobacilli. Polymers 2020, 12, 2387.

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