Deglycosylation of secondary plant metabolites by lactobacilli

Dr. Michael Ganzle-v1Prof. Michael Gänzle, University of Alberta, Canadawill join the Polyphenols Applications 2023 Congress and present his latest rearch about the "Deglycosylation of secondary plant metabolites by lactobacilli".

Lactobacillaceae are among the major fermentation organisms in food fermentations but their metabolic pathways for conversion of (poly)-phenolic compounds have been elucidated only in the past two decades. The first step of conversion is the hydrolysis of esters or glycosides of phenolic compounds. This study aimed to evaluate the ability of Lactobacillus crispatus FUA3540, Companilactobacillus paralimentarius FUA3121, Lacticaseibacillus paracasei FUA3413, Lactiplantibacillus plantarum TMW1.460, Levilactobacillus hammesii LP38T, Furfurilactobacillus rossiae FUA3124, and Ff. milii FUA3430T and Fructilactobacillus sanfranciscensis DSM20451T to hydrolyse glycosides of secondary plant metabolites.

The genomes of these strains encoded for 5, 20, 8, 10, 2, 1, 2 and 0 β-glucosidases or phospho‑β‑glucosidases, respectively. L. crispatus, Cp. paralimentarius, Lc. paracasei and Lp. plantarum but not Lv. hammesii, Ff. rossiae or Ff. milii hydrolysed cellobiose. The hydrolysis of amygladin, esculin, and salicin matched the hydrolysis of cellobiose. With exception of Fl. sanfranciscensis, all strains hydrolysed spiraeoside and genistin. Lp. plantarum and Cp. paralimentarius additionally hydrolysed isoquercetin.

Prof. Gänzle's data support the previous observation that many of the glycosyl hydrolases in lactobacilli are specific for glycosylated secondary plant metabolites rather than di- and oligosaccharides. Increased knowledge on their substrate specificity will facilitate the selection of fermentation organisms to secondary plant metabolites with desirable or undesirable biological activities in food fermentations.

Join us in Polyphenols Applications 2023 to learn more about Prof. Gänzle's talk. 

Polyphenols Applications 2023 Congress
September 28-29, 2023 - Malta

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