Increased exopolysaccharide production in Lactococcuc lactis due to increased levels of expression of the NIZO B40 eps gene cluster

I.C. Boels, R. van Kranenburg, M.W. Kanning, B.F. Chong, W.M. de Vos, M. Kleerebezem

Research output: Contribution to journalArticleAcademicpeer-review

34 Citations (Scopus)

Abstract

Exopolysaccharides (EPS) play an important role in the rheology and texture of fermented food products. This is the first report demonstrating that homologous overexpression of a complete eps gene cluster in Lactococcus lactis leads to increased EPS production levels. A ninefold-elevated EPS plasmid copy number led to an almost threefold increase in the eps expression level, resulting in an almost fourfold increase in the NIZO B40 EPS production level. It was previously reported that increased EPS precursor levels did not influence NIZO B40 EPS production levels. However, the present results indicate that the maximal NIZO B40 EPS production level is limited by the activity level of the expression products of the eps gene cluster rather than by the level of EPS precursors.
Original languageEnglish
Pages (from-to)5029-5031
JournalApplied and Environmental Microbiology
Volume69
DOIs
Publication statusPublished - 2003

Keywords

  • rheological properties
  • functional-analysis
  • sugar nucleotide
  • biosynthesis
  • glycolysis

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