Applied Microbiology and Biotechnology

, Volume 63, Issue 2, pp 136–142

Overproduction of lipase by Yarrowia lipolytica mutants

Original Paper

DOI: 10.1007/s00253-003-1342-3

Cite this article as:
Fickers, P., Nicaud, J.M., Destain, J. et al. Appl Microbiol Biotechnol (2003) 63: 136. doi:10.1007/s00253-003-1342-3

Abstract

Non-genetically modified mutants with increased capacities of extracellular lipase production were obtained from Yarrowia lipolytica strain CBS6303 by chemical mutagenesis. Of the 400 mutants isolated, LgX64.81 had the highest potential for the development of an industrial lipase production process. This mutant exhibits lipase production uncoupled from catabolite repression by glucose, and a 10-fold increased productivity upon addition of oleic acid. Using a LIP2-LacZ reporter gene, we demonstrate that the mutant phenotype originates from a trans-acting mutation. The glucose uptake capacity of LgX64.81 is reduced 2.5-fold compared to the wild-type-strain, and it exhibits high lipase production on glucose medium. A trans-acting mutation in a gene involved in glucose transport could thus explain this mutant phenotype.

Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • P. Fickers
    • 1
    • 2
  • J. M. Nicaud
    • 1
  • J. Destain
    • 3
  • P. Thonart
    • 2
  1. 1.Laboratoire de Microbiologie et de Génétique Moléculaire, UMR2585, CNRS INRAInstitut National Agronomique Paris-GrignonThiverval-GrignonFrance
  2. 2.Centre Wallon de Biologie Industrielle, Service de Technologie MicrobienneUniversité de LiègeLiègeBelgium
  3. 3.Centre Wallon de Biologie Industrielle, Unité de Bio-industriesFaculté Universitaire des Sciences Agronomiques de GemblouxGemblouxBelgium