Czech J. Food Sci., 2005, 23(3):116-120 | DOI: 10.17221/3380-CJFS

α-Glucosidase and β-glucosidase from psychrotrophic strain arthrobacter sp. C2-2

Eva Benešová, Michaela Marková, Blanka Králová
Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, Institute of Chemical Technology Prague, Prague, Czech Republic

In this work six psychophilic and psychrotrophic bacterial strains were screened for the presence of different glycosidase activities (α-galactosidase, α-glucosidase, β-glucosidase, α-mannosidase and β-glucuronidase). Nine enzymes were found and their elementary characteristics were measured (toptimum, pHoptimum, Km, Vlim).Two enzymes with the highest activities at low temperatures were chosen for the next study, i.e. α-glucosidase and β-glucosidase from the psychrotrophic strain Arthrobacter sp. C2-2. These enzymes were purified by ammonium sulphate precipitation, by chromatography with hydrophobic interaction, and by ion-exchange chromatography. Their molecular weights (α-glucosidase - 76 kDa, β-glucosidase - 93 kDa) were determined by gel chromatography. In addition to this, it was verified that both of these enzymes are able to catalyse the transglycosylation reaction with the saccharidic donor and acceptor.

Keywords: cold-active enzyme; glycosidase; transglycosylation

Published: June 30, 2005  Show citation

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Benešová E, Marková M, Králová B. α-Glucosidase and β-glucosidase from psychrotrophic strain arthrobacter sp. C2-2. Czech J. Food Sci. 2005;23(3):116-120. doi: 10.17221/3380-CJFS.
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