One-pot bi-enzymatic cascade synthesis of puerarin polyfructosides.
Carbohydr Polym
; 247: 116710, 2020 Nov 01.
Article
en En
| MEDLINE
| ID: mdl-32829838
Enzymatic glycosylation is an efficient way to increase the water solubility and the bioavailability of flavonoids. Levansucrases from Bacillus subtilis (Bs_SacB), Gluconacetobacter diazotrophicus (Gd_LsdA), Leuconostoc mesenteroides (Lm_LevS) and Zymomonas mobilis (Zm_LevU) were screened for puerarin (daidzein-8-C-glucoside) fructosylation. Gd_LsdA transferred the fructosyl unit of sucrose onto the glucosyl unit of the acceptor forming ß-d-fructofuranosyl-(2â6)-puerarin (P1a), while Bs_SacB, Lm_LevS and Zm_LevU synthesized puerarin-4'-O-ß-D-fructofuranoside (P1b) and traces of P1a. The Gd_LsdA product P1a was purified and assayed as precursor for the synthesis of puerarin polyfructosides (PPFs). Bs_SacB elongated P1a more competently forming a linear series of water-soluble PPFs reaching at least 21 fructosyl units, as characterized by HPLC-UV-MS, HPSEC and MALDI-TOF-MS. Simultaneous or sequential Gd_LsdA/Bs_SacB reactions yielded PPFs directly from puerarin with the acceptor conversion ranging 82-92 %. The bi-enzymatic cascade synthesis of PPFs in the same reactor avoided the isolation of the intermediate product P1a and it is appropriate for use at industrial scale.
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Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Polisacáridos
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Bacillus subtilis
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Gluconacetobacter
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Hexosiltransferasas
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Isoflavonas
Idioma:
En
Revista:
Carbohydr Polym
Año:
2020
Tipo del documento:
Article
Pais de publicación:
Reino Unido