Characterization and decolorization applicability of xerogel matrix immobilized manganese peroxidase produced from Trametes versicolor IBL-04

Protein Pept Lett. 2013 May;20(5):591-600. doi: 10.2174/0929866511320050013.

Abstract

A novel manganese peroxidase (MnP) isolated from solid state culture of Trametes versicolor IBL-04 was immobilized using xerogel matrix composed of trimethoxysilane (TMOS) and propyltetramethoxysilane (PTMS). FTIR spectroscopy confirmed the successful entrapment of MnP into the xerogel matrix. An immobilization efficiency of 92.2% was achieved with a purified active fraction containing 2 mg/mL MnP. After 24 h incubation at varying pH and temperatures, the immobilized MnP retained 82 and 75% activity at pH 4 and 80°C, respectively. Xerogel matrix immobilization enhanced the catalytic efficiency of entrapped MnP. Metal ions including Cu2+, Mn2+ and Fe2+ stimulated enzyme activity while cysteine, EDTA and Ag+ inhibited the activity. MnP preserved 82% of its initial activity during oxidation of MnSO4 in 10 consecutive cycles, demonstrating the reusability of xerogel entrapped MnP. The immobilized MnP could be stored for up to 75 days at 4°C without significant activity loss. To explore the industrial applicability of MnP, the immobilized MnP was tested for decolorization of textile industry effluent in a Packed Bed Reactor System (PBRS). After five consecutive cycles, 98.8% decolorization of effluent was achieved within 5 h. The kinetic properties, storage stability and reusability of entrapped MnP from T. versicolor IBL-04 reflect its prospects as biocatalyst for bioremediation and other industrial applications.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biodegradation, Environmental
  • Biotechnology / methods*
  • Coloring Agents / analysis
  • Coloring Agents / metabolism*
  • Enzyme Stability
  • Enzymes, Immobilized / chemistry*
  • Enzymes, Immobilized / metabolism*
  • Hydrogen-Ion Concentration
  • Peroxidases / chemistry*
  • Peroxidases / metabolism*
  • Polymers
  • Temperature
  • Trametes / enzymology*

Substances

  • Coloring Agents
  • Enzymes, Immobilized
  • Polymers
  • Peroxidases
  • manganese peroxidase