Cell surface display of Yarrowia lipolytica lipase Lip2p using the cell wall protein YlPir1p, its characterization, and application as a whole-cell biocatalyst

Appl Biochem Biotechnol. 2015 Apr;175(8):3888-900. doi: 10.1007/s12010-015-1557-7. Epub 2015 Mar 15.

Abstract

The Yarrowia lipolytica lipase Lip2p was displayed on the yeast cell surface via N-terminal fusion variant using cell wall protein YlPir1p. The hydrolytic activity of the lipase displayed on Y. lipolytica cells reached 11,900 U/g of dry weight. However, leakage of enzyme from the cell wall was observed. The calculated number of recombinant enzyme displayed on the cell surface corresponds to approximately 6 × 10(5) molecules per cell, which is close to the theoretical maximum (2 × 10(6) molecules/cell). Furthermore, the leaking enzyme was presented as three N-glycosylated proteins, one of which corresponds to the whole hybrid protein. Thus, we attribute the enzyme leakage to the limited space available on the cell surface. Nevertheless, the surface-displayed lipase exhibited greater stability to short-term and long-term temperature treatment than the native enzyme. Cell-bound lipase retained 74 % of its original activity at 60 °C for 5 min of incubation, and 83 % of original activity after incubation at 50 °C during 5 h. Cell-bound lipase had also higher stability in organic solvents and detergents. The developed whole-cell biocatalyst was used for recycling biodiesel synthesis. Two repeated cycles of methanolysis yielded 84.1 and 71.0 % methyl esters after 33- and 45-h reactions, respectively.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biofuels
  • Cell Wall / enzymology*
  • Cell Wall / genetics
  • Enzymes, Immobilized / chemistry
  • Glycoproteins / chemistry
  • Glycoproteins / genetics
  • Glycoproteins / metabolism*
  • Hydrolysis
  • Lipase / chemistry
  • Lipase / genetics
  • Lipase / metabolism*
  • Yarrowia / enzymology*
  • Yarrowia / genetics

Substances

  • Biofuels
  • Enzymes, Immobilized
  • Glycoproteins
  • Lipase