Abstract
Background: Laccases (Lacs) are used potentially in industrial and biotechnological
applications such as decolorization of dyes, degradation of industrial effluents, delignification, etc.
thanks to their large varieties of substrate specificities and excellent catalytic efficiencies. The
efficient utilizations of Lacs in these applications mostly depend on the identifying their
biochemical properties.
Objective: The goal of this research is to investigate the purification, biochemical characterization
and decolorization efficiencies of Lacs.
Methods: Pleurotus eryngii was incubated on peach (PC) and cherry (CC) wastes under optimized
solid state fermentation conditions. Then, the enzymes extracts were purified by ammonium sulfate
precipitation, anion exchange chromatography, gel filtration, respectively. Lacs fractions were
subjected to electrophoretic analyses as well as their structural and kinetic characteristics. Also, the
effects of selected chemical agents on purified Lacs activities and determination of decolorization
efficiencies were studied.
Results: As the results of purification processes of Lacs from both cultures, 3.94-fold purification
was obtained for PC, while it was 5.34 for CC. The electrophoretic results of purified Lacs
illustrated the single bands of protein (30±1 kDa) in accordance with the results after gel filtration.
The Km values of Lacs from PC and CC were respectively detected as 1.1381 and 0.329 mM for
ABTS. The selected agents partially/completely inhibited Lac activities. The highest decolorization
efficiencies of purified Lacs from PC and CC were separately obtained as 53 and 11.8%.
Conclusion: The results clearly indicated that the performances of Lacs from both cultures in
decolorization application are different from each other depending their activities, biochemical and
kinetic characteristics.
Keywords:
Biochemical characterization, cherry waste, dye decolorization, laccase, peach waste, Pleurotus eryngii,
purification.
Graphical Abstract
[1]
Mussatto, S.I.; Teixeira, J.A. Lignocellulose as raw material in fermentation processes. in: Current research, technology and education topics in applied microbiology and microbial biotechnology; Méndez-Vilas, A., Ed.; Formatex Research Center: Badajoz, Spain, 2010, pp. 897-907.
[8]
Patel, H.; Gupte, S.; Gahlout, M.; Gupte, A. purification and characterization of an extracellular laccase from solid-state culture of pleurotus ostreatus hp-1. 3 biotech. 2014, 4(1), 77-84.
[12]
Akpinar, M.; Ozturk Urek, R. induction of fungal laccase production under solid state bioprocessing of new agroindustrial waste and its application on dye decolorization. 3 biotech., 2017, 7(2), 98-108.
[13]
Akpinar, M. Production of some ligninolytic and hydrolytic enzymes with solid state fermentation. phd thesis, dokuz eylül university: i̇zmir, july, 2017.
[18]
Taqi, M. Biomass Production, Purification and Characterization of Selected Microbial Laccases. phd thesis, mcgill university: montreal, march, 2012.
[23]
Sathishkumar, P.; Palvannan, T. Purification and characterization of Pleurotus florida laccase (L1) involved in the Remazol Brilliant Blue R (RBBR) decoloration. J. Environ. Treat. Tech., 2013, 1(1), 24-34.
[33]
Devasena, T. Enzymology; Oxford University Press: India, 2010.
[34]
Vantamuri, A.B.; Kaliwal, B.B. purification and characterization oflaccase from marasmius species bbkav79 and effective decolorization of selected textile dyes. 3 biotech. 2016, 6(2), 189-199.
[38]
Chaurasia, P.K.; Bharati, L.S.; Singh, S.K. Comparative studies on the blue and yellow laccases. Res. Plant Sci., 2013, 1(2), 32-37.
[44]
Asgher, M.; Kamal, S.; Iqbal, H.M.N. improvement of catalytic efficiency, thermo-stability and dye decolorization capability of pleurotus ostreatus ibl-02 laccase by hydrophobic sol gel entrapment. chem. cent. j. 2012, 6(1)110, , 1-10.
[51]
Prasada, A.A.; Kumara, G.; Thomasb, D.M. Microbial decolorization of azo dyes ̶ A mini review. Bull. Chem. Pharma. Res., 2017, 1(1), 30-39.