Abstract:
Levansucrase enzyme is excreted out of from Bacillus siamensis which can degrade
sucrose become as products with hydrolysis and transfructosylation reaction formed as a
polysaccharide or levan. In this study, we performed by using the purified levansucrase enzyme to
find the optimum condition of sucrose concentration, pH and temperature effect to the production
of levan. In which all 5 proteins were found after purification of the enzyme. The enzyme was
finally purified about 11.47 folds purer than crude enzyme, with a recovery of 78.75%. The
specific activity of enzyme was 15.95 IU/mL. The optimization of sucrose concentration was
20% (w/v), pH 6 of phosphate buffer and acetate buffer at 37 ºC for 48 hours. The condition of
phosphate buffer and acetate buffer were not significantly different. The maximal enzyme activity
of levansucrase was 0.4 IU/mL which produce levan to 14.59% (w/v). Moreover, we used
purified levansucrase enzyme to produce levan from the food industry waste. The results showed
that maximal enzyme activity was 0.066 IU/mL. On the other hand, by using immobilized
levansucrase enzyme, it was found the maximal enzyme activity was 0.023 IU/mL. From the
study, it can be concluded that the levansucrase enzyme can transform the food waste into levan,
which is a substance that is worth to encourage the development of health products.