Abstract
The potential of newly isolated Lactobacillus amylolyticus L6 as probiotics was investigated based on the whole genome sequence and corresponding phenotypes. With Lactobacillus acidophilus NCFM as positive control, several established methods of evaluating potential probiotics were performed on L. amylolyticus L6. The results indicated that L. amylolyticus L6 retained higher viability in human gastrointestinal (GI) tract and it also had strong inhibitory effect on pathogenic bacteria. Meanwhile, the candidate probiotics exhibited similar adhesion level as that of L. acidophilus NCFM in vitro test. As for carbohydrate utilization profile, L. amylolyticus L6 had high ability of utilizing raffinose and stachyose which were known as flatulence factors in soybean products. And this strain could also utilize starch. Besides, the mechanisms of probiotic and metabolic properties for L. amylolyticus L6 were further illustrated with the identification of related genes through the analysis of genome sequence. Therefore, we proposed that L. amylolyticus L6 have the potential to be used as probiotics from phenotypes to genotypes. And it is the first time that the complete genome sequence of L. amylolyticus L6 and the potential of this strain to be used as probiotics were reported in this study.
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