Adsorption of Trametes versicolor laccase to soil iron and aluminum minerals: enzyme activity, kinetics and stability studies

Y Wu, Y Jiang, J Jiao, M Liu, F Hu, BS Griffiths, H Li

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Laccases play an important role in the degradation of soil phenol or phenol-like substance and can be potentially used in soil remediation through immobilization. Iron and aluminum minerals can adsorb extracellular enzymes in soil environment. In the present study, we investigated the adsorptive inter-action of laccase, from the white-rot fungus Trametes versicolor, with soil iron and aluminum minerals and characterized the properties of the enzyme after adsorption to minerals. Results showed that both soil iron and aluminum minerals adsorbed great amount of laccase, independent of the mineral specific surface areas. Adsorbed laccases retained 26–64% of the activity of the free enzyme. Compared to the free laccase, all adsorbed laccases showed higher Kmvalues and lower Vmaxvalues, indicating a reduced enzyme-substrate affinity and a lower rate of substrate conversion in reactions catalyzed by the adsorbed laccase. Adsorbed laccases exhibited increased catalytic activities compared to the free laccaseat low pH, implying the suitable application of iron and aluminum mineral-adsorbed T. versicolor laccasein soil bioremediation, especially in acid soils. In terms of the thermal profiles, adsorbed laccases showed decreased thermal stability and higher temperature sensitivity relative to the free laccase. Moreover,adsorption improved the resistance of laccase to proteolysis and extended the lifespan of laccase. Our results implied that adsorbed T. versicolor laccase on soil iron and aluminum minerals had promising potential in soil remediation.
Original languageEnglish
Pages (from-to)342 - 348
Number of pages7
JournalColloids and Surfaces B: Biointerfaces
Volume114
Early online date17 Oct 2013
DOIs
Publication statusPrint publication - Feb 2014

Bibliographical note

1023321

Keywords

  • Adsorption
  • Characteristics
  • Soil aluminum mineral
  • Soil iron mineral
  • Trametes versicolor laccase

Fingerprint Dive into the research topics of 'Adsorption of <i>Trametes versicolor</i> laccase to soil iron and aluminum minerals: enzyme activity, kinetics and stability studies'. Together they form a unique fingerprint.

  • Cite this