Study of influential factors on oligosaccharide formation by fructosyltransferase activity during stachyose hydrolysis by pectinex ultra SP-L

The influence of reaction conditions for oligosaccharide synthesis from stachyose using a commercial enzymatic preparation from Aspergillus aculeatus (Pectinex Ultra SP-L) was studied. Oligosaccharides were analyzed by gas chromatography with flame ionization detection (GC-FID) and matrix-assisted laser desorption/ionization–time-of-flight–mass spectrometry (MALDI-TOF-MS). Galactosyl-melibiose (DP3) was synthesized as a result of fructosidase activity, whereas fructosyl-stachyose (DP5) and difructosyl-stachyose (DP6) were formed as a consequence of the fructosyltransferase activity of Pectinex Ultra SP-L. The optimal reaction conditions for the synthesis of penta- and hexasaccharides were 60 °C, pH 5.5, 600 mg/mL stachyose, and 34 U/mL enzyme. Reaction time played an important role in oligosaccharide mixture composition constituted by 20% DP5, 0.7% DP6, 55% stachyose, 21% galactosyl-melibiose, and 1% monosaccharides after 1 h and 16% DP5, 4% DP6, 27% stachyose, 44% galactosyl-melibiose, and 2% monosaccharides after 3 h. In conclusion, stachyose could be used as a substrate for the enzymatic synthesis of new oligosaccharides that may open new opportunities in the development of future prebiotics.

Bibliographic Details

Main Authors:	Montilla, Antonia, Olano, Agustín, Martínez Villaluenga, Cristina, Corzo, Nieves
Other Authors:	Comunidad de Madrid
Format:	artículo biblioteca
Language:	English
Published:	American Chemical Society 2011
Online Access:	http://hdl.handle.net/10261/50151 http://dx.doi.org/10.13039/501100004837 http://dx.doi.org/10.13039/100012818 http://dx.doi.org/10.13039/501100011698
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