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http://dx.doi.org/10.3746/jkfn.2003.32.5.684

Production of L-α-Glycerophosphate Oxidase by streptococcus faecium M74 · LC  

Lee, In-Ae (Institute of Agricultural Science and Technology, Kyungpook National University)
Lee, Eun-Sook (Dept. of Preparatory Oriental Medicine, Kyungsan University)
Lee, June-Woo (Dept. of Food Processing and Cooking, Kyungbuk College)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.32, no.5, 2003 , pp. 684-688 More about this Journal
Abstract
The objective of this study was to search for the best strain as a source of L- $\alpha$-glycerophosphate oxidase (GPO) production and to establish the process technology for the purification of GPO on an industrial scale. The GPO was produced by culturing Streptococcus faecium, and purified by ammonium sulfate, DEAE-cellulose and hydroxyapatite chromatography. The relative activity was 60 units/L for 5. faecim ATCC 12755, 65 units/L for 5. faecium ATCC 19634, and 67 units/L for 5. faecium $M_{74}$.LC, respectively. The optimum condition for fermentation was $37^{\circ}C$ for temperature, 300 rpm for stir rate, 0.5 L/min for aeration rate and 17 hours. The main culture medium prepared by the modified AC medium. AC medium consists of 0.1% glucose, 0.2% glycerol, 1.0% tryptone and 1.0% yeast extract, 0.5% $K_2HP0_4$, pH 7.0. The GPO was purified by ammonium sulfate fractionation and ion exchange column chromatography, The yield and purity were 17.2% and 5.3 fold, respectively.
Keywords
L-$\alpha$-glycerophosphate oxidase; GPO production; Streptococcus faecium; triglycerides; ;
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