Characterization of a tannase from Emericella nidulans immobilized on ionic and covalent supports for propyl gallate synthesis

Biotechnol Lett. 2013 Apr;35(4):591-8. doi: 10.1007/s10529-012-1111-4. Epub 2012 Dec 15.

Abstract

The extracellular tannase from Emericela nidulans was immobilized on different ionic and covalent supports. The derivatives obtained using DEAE-Sepharose and Q-Sepharose were thermally stable from 60 to 75 °C, with a half life (t50) >24 h at 80 °C at pH 5.0. The glyoxyl-agarose and amino-glyoxyl derivatives showed a thermal stability which was lower than that observed for ionic supports. However, when the stability to pH was considered, the derivatives obtained from covalent supports were more stable than those obtained from ionic supports. DEAE-Sepharose and Q-Sepharose derivatives as well as the free enzyme were stable in 30 and 50 % (v/v) 1-propanol. The CNBr-agarose derivative catalyzed complete tannic acid hydrolysis, whereas the Q-Sepharose derivative catalyzed the transesterification reaction to produce propyl gallate (88 % recovery), which is an important antioxidant.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carboxylic Ester Hydrolases / chemistry
  • Carboxylic Ester Hydrolases / metabolism*
  • Emericella / enzymology*
  • Enzyme Stability
  • Enzymes, Immobilized / chemistry
  • Enzymes, Immobilized / metabolism*
  • Hydrogen-Ion Concentration
  • Propyl Gallate / metabolism*
  • Tannins / metabolism
  • Temperature

Substances

  • Enzymes, Immobilized
  • Tannins
  • Propyl Gallate
  • Carboxylic Ester Hydrolases
  • tannase