A novel family of glucosyl 1,5-anhydro-D-fructose derivatives synthesised by transglucosylation with dextransucrase from Leuconostoc mesenteroides NRRL B-512

摘要

1,5-Anhydro-D-fructose (AF),a metabolite of starch/glycogen degradation,is a good antioxidant.With the prospect of increasing its applications and use as a food ingredient,AF glucosylation catalysed by the dextransucrase from Leuconostoc mesenteroides NRRL B-512F was performed in the presence of sucrose.This led to AF glucosylated derivatives containing alpha-(1->6) linkages named 1,5-anhydro-D-fructo-glucooligosaccharides (AFGOS).LC-MS analyses showed that AFGOS with a degree of polymerisation (DP) of up to 7 were synthesised.The amount of AFGOS produced and the average DP increased by using a high sucrose/AF molar ratio and high total sugar concentration.AFGOS were proved to present antioxidant properties quite similar to AF.