Optimization of culture medium for lactosucrose (4G-β-D-galactosylsucrose) production by Sterigmatomyces elviae mutant using statistical analysis

Jong Ho Lee, Jung Soo Lim, Yoon Seok Song, Seong Woo Kang, Chulhwan Park, Seung Wook Kim

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In this study, the optimization of culture medium using a Sterigmatomyces elviae mutant was investigated using statistical analysis to increase the cell mass and lactosucrose (4G-β-D-galactosylsucrose) production. In basal medium, the cell mass and lactosucrose production were 4.12 g/l and 140.91 g/l, respectively. However, because of the low cell mass and lactosucrose production, optimization of culture medium was carried out to increase the cell mass and lactosucrose production. Culture media were optimized by the S. elviae mutant using analysis of variance (ANOVA) and response surface methodology (RSM). Central composite designs using RSM were utilized in this investigation. Quadratic models were obtained for cell mass and lactosucrose production. In the case of cell mass, optimal components of the medium were as follows: sucrose 1.13%, yeast extract 0.99%, bactopeptone 2.96%, and ammonium sulfate 0.40%. The predicted maximum value of cell mass was about 5.20 g/l and its experimental value was 5.08 g/1. In the case of lactosucrose production, optimal components of the medium were as follows: sucrose 0.96%, yeast extract 1.2%, bactopeptone 3.0%, and ammonium sulfate 0.48%. Then, the predicted maximum value of lactosucrose production was about 194.12 g/l and the corresponding experimental value was about 183.78g/l. Therefore, by culturing using predicted conditions, the real cell mass and lactosucrose production increased to 23.3% and 30.42%, respectively.

Original languageEnglish
Pages (from-to)1996-2004
Number of pages9
JournalJournal of Microbiology and Biotechnology
Volume17
Issue number12
Publication statusPublished - 2007 Dec 1

Keywords

  • Lactosucrose
  • Medium optimization
  • Response surface methodology
  • Sterigmatomyces elviae mutant

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology
  • Microbiology
  • Bioengineering

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