Dextran-dextrinase

Gluco-oligosaccharides (GlcOS) can be made by the action of an enzyme, dextran dextrinase produced by Gluconobacter oxydans on maltodextrins. They have been made in whole-cell bioreactors [104] and evaluated in fecal batch cultures [105] and in three-stage gut models [106]. Mountzouris et al. [104] used methylation analysis to determine the linkages of... 

Transglucosylation and Hydrolysis Activity of Gluconobacter oxydans Dextran Dextrinase with Several Donor and Acceptor Substrates... 

Abstract In this paper the reactivity of Gluconobacter oxydans dextran dextrinase... 

Dextran-Dextrinase. A dextran-forming enzyme from Acetobacter cap-sularum converts a-1,4 linkages to a-1,6, but acts only on substrates of intermediate size. This dextran-dextrinase catalyzes a reversible reaction in which the terminal residue of either a dextrin (a-1,4) or a dextran (a-1,6) is transferred to the other polysaccharide. ... 

The majority of dextrans in nature are produced extracellularly via dextran-sucrase from sucrose by several lactic acid bacteria, principally Leuconostoc and Streptococcus species [13]. Dextran is also synthesised by dextrinase of different Gluconobacter species [56]. Referring to this enzyme, fermentation of maltodextrins leads to a- —4) branched dextrans with comparatively lower Mw. However, dextransucrase from Leuconostoc mesenteroid.es NRRL B-512F has attracted most interest because of commercial use. 

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