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- W2584749298 abstract "2-O-(α-d-Glucopyranosyl)-sn-glycerol (αGG) is a natural osmolyte. αGG is produced industrially for application as an active cosmetic ingredient. The biocatalytic process involves a selective transglucosylation from sucrose to glycerol catalyzed by sucrose phosphorylase (SPase). Here we examined immobilization of SPase (from Leuconostoc mesenteroides) on solid support with the aim of enabling continuous production of αGG. By fusing SPase to the polycationic binding module Zbasic2 we demonstrated single-step noncovalent immobilization of the enzyme chimera to different porous supports offering an anionic surface. We showed that immobilization facilitated by Zbasic2 was similarly efficient as immobilization by multipoint covalent attachment on epoxy-activated supports in terms of production of αGG. Enzyme loadings of up to 90 mg enzyme g−1 support were obtained and the immobilized SPase was about half as effective as the enzyme in solution. The high regio- and chemo-selectivity of soluble SPase in αGG synthesis was retained in the immobilized enzyme and product yields of >85% were obtained at titers of ∼800 mM. The Zbasic2-SPase immobilizates were fully recyclable: besides reuse of the enzyme activity, easy recovery of the solid support for fresh immobilizations was facilitated by the reversible nature of the enzyme attachment. Application of immobilized Zbasic2-SPase for continuous production of αGG in a microstructured flow reactor was demonstrated. Space-time yields of 500 mmol αGG L−1 h−1 were obtained at product titers of ∼200 mM. The continuous microreactor was operated for 16 days and an operational half-life of about 10 days was determined." @default.
- W2584749298 created "2017-02-10" @default.
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- W2584749298 date "2017-09-01" @default.
- W2584749298 modified "2023-10-09" @default.
- W2584749298 title "Production of glucosyl glycerol by immobilized sucrose phosphorylase: Options for enzyme fixation on a solid support and application in microscale flow format" @default.
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- W2584749298 doi "https://doi.org/10.1016/j.jbiotec.2017.01.019" @default.
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