Polyglucosylation of rutin catalyzed by cyclodextrin glucanotransferase from geobacillus sp.: optimization and chemical characterization of products
Despite the presence of a rutinosyl group at 3-OH, the aqueous solubility of the flavonoid rutin is even lower than that of its aglycon quercetin. In this work, we describe a fast, simple, and easily scalable process for polyglucosylation of rutin to enhance aqueous solubility, catalyzed by a cyclod...
| Autores: | , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/716962 |
| Acceso en línea: | http://hdl.handle.net/10486/716962 https://dx.doi.org/10.1021/acs.iecr.1c03070 |
| Access Level: | acceso abierto |
| Palabra clave: | Cyclodextrin glucosyltransferase starch Biblioteconomía y Documentación |
| Sumario: | Despite the presence of a rutinosyl group at 3-OH, the aqueous solubility of the flavonoid rutin is even lower than that of its aglycon quercetin. In this work, we describe a fast, simple, and easily scalable process for polyglucosylation of rutin to enhance aqueous solubility, catalyzed by a cyclodextrin glucanotransferase (CGTase). Several reaction parameters (source of enzyme, rutin/starch weight ratio, cosolvent, pH, and temperature) were assessed to optimize the transglucosylation yield. Under the best conditions (6 mg/mL rutin, 30 mg/mL soluble starch as glucosyl donor, 20% (v/v) acetonitrile, pH 9.2, 3.3 U/mL CGTase from Geobacillus sp., 60 °C), the total glucosides reached a maximum concentration of 6 mM (60% conversion yield). The glucosylated products were chemically characterized by MALDI-TOF mass spectrometry and 2D nuclear magnetic resonance. The glucosylation takes place with an α-configuration at the 4-OH position of the β-Glc moiety. A series of maltooligosyl derivatives with 1–6 residues of glucose linked by α(1 → 4) bonds was obtained. The yield of monoglucosylated product was increased 2-fold by treatment with amyloglucosidase STA1 from S. cerevisiae |
|---|