Recovery of lignin peroxidase from submerged liquid fermentation of Amauroderma rugosum (Blume & T. Nees) Torrend using polyethylene glycol/salt aqueous two-phase system

Wan Yng Linda Jong, Pau Loke Show, Tau Chuan Ling, Yee Shin Tan

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Amauroderma rugosum is a wild mushroom species widely distributed in tropics and is classified under the class of Basidiomycetes. Basidiomycetes are well-known for their abilities of producing lignocellulolytic enzymes such as lignin peroxidase (LiP), laccase (Lac) and manganese peroxidase (MnP). Different factors such as nutrient sources, incubation period and agitation affect the production of lignocellulolytic enzymes. The A. rugosum produced LiP in the medium supplemented with potato dextrose broth (PDB), 0.5% yeast and 1.0% saw dust at 26.70 ± 3.31 U/mL. However, the LiP activity was increased to 106.32 ± 5.32 U/mL when supplemented with 150 μm of copper (CuSO4). The aqueous two-phase system (ATPS) is a simple, rapid and low cost method for primary extraction and recovery of LiP. A total of 25 systems made from five different molecular weights of polyethylene glycol (PEG)/dipotassium hydrogen phosphate (K2HPO4) were tested. PEG 600 produced the highest top phase purification factor (PFT) of 1.33 ± 0.62 with yield of 72.18 ± 8.50%. The optimization of the ATPS parameters, such as volume ratio VR, pH and crude enzyme loading are the factors controlling the phase partition. Our results showed that significant improvement (PFT of 6.26 ± 2.87 with yield of 87.31 ± 3.14%) of LiP recovery can be achieved by optimized the parameters.

Original languageBritish English
Pages (from-to)91-98
Number of pages8
JournalJournal of Bioscience and Bioengineering
Volume124
Issue number1
DOIs
StatePublished - Jul 2017

Keywords

  • Aqueous two-phase system
  • Lignin peroxidase
  • Mushroom
  • Polyethylene glycol
  • Purification factor
  • Submerged fermentation

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