Enhanced Production of L-Aspartate ${\beta}-Decarboxylase$ by Nitrogen Source in Pseudomonas dacunhae

  • Kim, Dong-Chung (Department of Food Science, Suncheon First College) ;
  • Lee, Sung-Dong (Department of Food and Nutrition, College of Health Science, Korea University) ;
  • In, Man-Jin (Department of Human Nutrition and Food Science, Chungwoon University)
  • Published : 2006.09.30

Abstract

Improvement of L-asparate ${\beta}-decarboxylase$ production from Pseudomonas dacunhae ATCC 21192 was attempted by optimizing fermentation conditions. Optimum carbon and nitrogen sources for cell growth and enzyme production were determined. L-Glutamate (2%) was the most suitable carbon source, and D-glucose, D-glycerol and fumarate repressed enzyme production. Yeast extract (2%) was the most effective as nitrogen source. A slight change of pH to 6.5 from medium pH resulted in a meaningful increase in the production of enzyme. The production of the enzyme was highly improved by using 2% yeast extract and 2% L-glutamate in culture media. Maximum L-asparate ${\beta}-decarboxylase$ activity reached up to over 24 U/mL-broth by 15 h flask fermentation.

Keywords

References

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