Expression of a ß-glucosidase in bacteria with biotechnological interest confers them the ability to deglycosylate lignans and flavonoids in vegetal foods.
Appl Microbiol Biotechnol
; 104(11): 4903-4913, 2020 Jun.
Article
em En
| MEDLINE
| ID: mdl-32270251
ABSTRACT
Lignans and flavonoids are found in plants in their glycosylated forms and need to be hydrolyzed to aglycones to become bioavailable. Putative ß-glucosidase genes from Lactobacillus mucosae INIA P508 were inserted into the plasmid pNZTuR. The strain Lactococcus lactis MG1363 harboring the plasmid pNZTuR.glu913 showed high ß-glucosidase activity and was able to transform secoisolariciresinol diglucoside (SDG) into secoisolariciresinol (SECO). Lactic acid bacteria and Bifidobacterium strains harboring pNZTuR.glu913 were incubated with a soy beverage supplemented with flax seed extracts. SDG was almost completely consumed by the transformed strains, while concentration of SECO greatly increased. Moreover, these strains showed high deglycosylation of the isoflavone glycosides daidzin and genistin. In addition, other lignan and flavonoid aglycones were produced, i.e. matairesinol, pinoresinol, quercetin, and eriodyctiol. These deglycosylase activities were maintained when this glucosidase gene was cloned in a food grade vector, pLEB590, and transformed into L. lactis MG1363. This is the first report of the use of a food grade plasmid that confers the ability to efficiently catalyze the deglycosylation of lignans, isoflavonoids, flavones, and flavanones. The recombinant bacteria of this study would be of value for the development of fermented vegetal foods enriched in bioavailable forms of lignans and flavonoids.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Flavonoides
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Beta-Glucosidase
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Lignanas
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Microbiologia de Alimentos
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Lactobacillus
Idioma:
En
Revista:
Appl Microbiol Biotechnol
Ano de publicação:
2020
Tipo de documento:
Article