Abstract
Prebiotic oligosaccharides are nondigestible carbohydrates that can be obtained by enzymatic synthesis. Glucosyltransferases can be used to produce these carbohydrate through an acceptor reaction synthesis. When maltose is the acceptor a trisaccharide composed of one maltose unit and one glucose unit linked by an α-1,6-glycosidic bond (panose) is obtained as the primer product of the dextransucrase acceptor reaction. In this work, panose enzymatic synthesis was evaluated by a central composite experimental design in which maltose and sucrose concentration were varied in a wide range of maltose/sucrose ratios in a batch reactor system. A partially purified enzyme was used in order to reduce the process costs, because enzyme purification is one of the most expensive steps in enzymatic synthesis. Even using high maltose/sucrose ratios, dextran and higher-oligosaccharide formation were not avoided. The results showed that intermediate concentrations of sucrose and high maltose concentration resulted in high panose productivity with low dextran and higher-oligosaccharide productivity.
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Abbreviations
- PDXT:
-
dextran productivity (g/[L·h])
- PHO:
-
productivity of higher oligosaccharides (g/[L·h])
- PPan:
-
productivity of panose (g/[L·h])
- S :
-
initial concentration of sucrose (mmol/L)
- M :
-
initial concentration of maltose (mmol/L)
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Rabelo, M.C., Honorato, T.L., Gonçalves, L.R.B. et al. Enzymatic synthesis of prebiotic oligosaccharides. Appl Biochem Biotechnol 133, 31–40 (2006). https://doi.org/10.1385/ABAB:133:1:31
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DOI: https://doi.org/10.1385/ABAB:133:1:31