An enhanced process for the production of a highly purified extracellular lipase in the non-conventional yeast Yarrowia lipolytica

Appl Biochem Biotechnol. 2010 Mar;160(5):1371-85. doi: 10.1007/s12010-009-8599-7. Epub 2009 Mar 31.

Abstract

Yarrowia lipolytica LgX64.81 is a non-genetically modified mutant that was previously identified as a promising microorganism for extracellular lipase production. In this work, the development of a fed-batch process for the production of this enzyme in this strain was described. A lipolytic activity of 2,145 U/mL was obtained after 32 h of batch culture in a defined medium supplemented with 10 g/L of tryptone, an enhancer of lipase expression. To maximize the volumetric productivity, two different fed-batch strategies had been investigated. In comparison to batch process, the intermittent fed-batch strategy had not improved the volumetric lipase productivity. In contrast, the stepwise feeding strategy combined with uncoupled cell growth and lipase production phases resulted in a 2-fold increase in the volumetric lipase productivity, namely, the lipase activity reached 10,000 U/mL after 80 h of culture. Furthermore, this lipase was purified to homogeneity by anion exchange chromatography on MonoQ resin followed by gel filtration on Sephacryl S-100. This process resulted in an overall yield of 72% and a 3.5-fold increase of the specific lipase activity. The developed process offers a great potential for an economic production of Lip2 at large scale in Y. lipolytica LgX64.81.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bioreactors / microbiology
  • Biotechnology / methods*
  • Chromatography, Gel
  • Culture Media / pharmacology
  • Electrophoresis, Polyacrylamide Gel
  • Extracellular Space / enzymology*
  • Lipase / biosynthesis*
  • Lipase / genetics
  • Lipase / isolation & purification*
  • Mutation / genetics
  • Time Factors
  • Yarrowia / enzymology*

Substances

  • Culture Media
  • Lipase