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Purification and Substrate Specificity of Debaryomyces sp. ${\alpha}$-Galactosidase by Mannobiose-Sepharose Affinity Column Chromatograpy  

Park, Gwi-Gun (Department of Food & Bioengineering, Kyungwon University)
Publication Information
Applied Biological Chemistry / v.49, no.3, 2006 , pp. 180-185 More about this Journal
Abstract
${\alpha}$-Galactosidase was partially purified from the culture filtrate of Debaryomyces sp. by Mannobiose-Sepharose affinity column chromatography. The galactosidase exhibited maximum activity at pH 4.0 and $60^{\circ}C$, and was stable in the pH and temperature ranges of 3 to 4.5 and 30 to $50^{\circ}C$, respectively. The enzyme was inhibited by $Hg^{2+}\;and\;Ag^{2+}$. The enzyme activity was not affected considerably by treatment with other metal compounds. The enzyme hydrolyzed melibiose to galactose and glucose, raffinose to galactose and sucrose, and $Gal^3Man_3$ ($6^3-{\alpha}$-galactosyl-1,4-mannotriose) to galactose and mannotriose. On the contrary, it could not hydrolyze $Gal^3Man_4$ ($6^3-{\alpha}$-galactosyl-1,4-mannotetraose).
Keywords
${\alpha}$-galactosidase; Debaryomyces sp.; mannobiose-sepharose affinity resin;
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