Preparation of a whole-cell biocatalyst of Aspergillus niger lipase and its practical properties

J Agric Food Chem. 2010 Oct 13;58(19):10426-30. doi: 10.1021/jf1008555.

Abstract

Aspergillus niger lipase (ANL), a widely used hydrolase, was displayed for the first time on the surface of Saccharomyces cerevisiae using a-agglutinin as an anchor protein. Localization of ANL on the cell surface was confirmed by immunofluorescence microscopy. The displayed ANL was confirmed to be active toward tributyrin and p-nitrophenyl caprylate (pNPC). The hydrolytic activity toward pNPC reached 43.8 U/g of dry cell weight after induction by galactose for 72 h. The ANL-displaying cells were characterized for their use as whole-cell biocatalysts. The optimum temperature was 45 °C, and the pH was 7.0. The cells had good thermostability, retaining almost 80% of the full activity after incubation at 60 °C for 1 h, and >80% of the full activity at 50 °C for 6 h. The displayed lipase showed a preference for medium-chain fatty acid p-nitrophenyl esters. Therefore, the produced whole-cell catalyst is likely to have a wide range of applications.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aspergillus niger / enzymology*
  • Aspergillus niger / genetics
  • Catalysis
  • Cell Wall / enzymology
  • Hot Temperature
  • Hydrogen-Ion Concentration
  • Lipase / genetics
  • Lipase / metabolism*
  • Microscopy, Fluorescence
  • Plasmids / genetics
  • Recombinant Proteins / metabolism*
  • Saccharomyces cerevisiae / enzymology
  • Saccharomyces cerevisiae / genetics*
  • Transfection

Substances

  • Recombinant Proteins
  • Lipase