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Malbert Y, Moulis C, Brison Y, Morel S, André I, Remaud-Simeon M. Engineering a branching sucrase for flavonoid glucoside diversification. Sci Rep 2018; 8:15153. [PMID: 30310109 PMCID: PMC6181985 DOI: 10.1038/s41598-018-33394-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 09/21/2018] [Indexed: 01/01/2023] Open
Abstract
Enzymatic glycosylation of flavonoids is an efficient mean to protect aglycons against degradation while enhancing their solubility, life time and, by extension, their bioavailability which is critical for most of their applications in health care. To generate a valuable enzymatic platform for flavonoid glucosylation, an α-1,2 branching sucrase belonging to the family 70 of glycoside-hydrolases was selected as template and subsequently engineered. Two libraries of variants targeting pair-wise mutations inferred by molecular docking simulations were generated and screened for quercetin glucosylation using sucrose as a glucosyl donor. Only a limited number of variants (22) were retained on the basis of quercetin conversion and product profile. Their acceptor promiscuity towards five other flavonoids was subsequently assessed, and the automated screening effort revealed variants showing remarkable ability for luteolin, morin and naringenin glucosylation with conversion ranging from 30% to 90%. Notably, naringenin and morin, a priori considered as recalcitrant compounds to glucosylation using this α-transglucosylases, could also be modified. The approach reveals the potential of small platforms of engineered GH70 α-transglucosylases and opens up the diversity of flavonoid glucosides to molecular structures inaccessible yet.
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Affiliation(s)
- Yannick Malbert
- Laboratoire d'Ingénierie des Systèmes Biologiques et Procédés, LISBP, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France. 135, avenue de Rangueil, F-31077, Toulouse, cedex 04, France
| | - Claire Moulis
- Laboratoire d'Ingénierie des Systèmes Biologiques et Procédés, LISBP, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France. 135, avenue de Rangueil, F-31077, Toulouse, cedex 04, France
| | - Yoann Brison
- Laboratoire d'Ingénierie des Systèmes Biologiques et Procédés, LISBP, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France. 135, avenue de Rangueil, F-31077, Toulouse, cedex 04, France
| | - Sandrine Morel
- Laboratoire d'Ingénierie des Systèmes Biologiques et Procédés, LISBP, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France. 135, avenue de Rangueil, F-31077, Toulouse, cedex 04, France
| | - Isabelle André
- Laboratoire d'Ingénierie des Systèmes Biologiques et Procédés, LISBP, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France. 135, avenue de Rangueil, F-31077, Toulouse, cedex 04, France
| | - Magali Remaud-Simeon
- Laboratoire d'Ingénierie des Systèmes Biologiques et Procédés, LISBP, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France. 135, avenue de Rangueil, F-31077, Toulouse, cedex 04, France.
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Malbert Y, Pizzut-Serin S, Massou S, Cambon E, Laguerre S, Monsan P, Lefoulon F, Morel S, André I, Remaud-Simeon M. Extending the Structural Diversity of α-Flavonoid Glycosides with Engineered Glucansucrases. ChemCatChem 2014. [DOI: 10.1002/cctc.201402144] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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