Purification and characterization of laccase from the white-rot fungus Pleurotus pulmonarius VAST02.42

Author affiliations

Authors

  • Dang Thu Quynh Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam https://orcid.org/0000-0001-6437-6304
  • Le Viet Hoang Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam https://orcid.org/0009-0006-4752-4057
  • Le Mai Huong Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Do Huu Nghi Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam https://orcid.org/0000-0002-6272-0922

DOI:

https://doi.org/10.15625/2525-2518/18875

Keywords:

Laccase, Pleurotus pulmonarius, white-rot fungus, Muong Phang, biocatalytic oxidation

Abstract

Laccase (EC 1.10.3.2) is a multi-copper oxidase that utilizes molecular oxygen to oxidize phenolic rings to phenyloxy radicals. Due to its capability to use a wide variety of phenolic and non-phenolic substrates, this oxidative enzyme has potential applications in the food, pharmaceutical, and environmental industries. In the present study, a laccase (PleuLac) from the white-rot fungus Pleurotus pulmonarius VAST02.42 that was newly isolated from Muong Phang special-use forest, was purified and studied on physical-chemical properties. After ultrafiltration (10, 30 kDa cut-off), laccase was successfully purified to apparent homogeneity (specific activity of 28 U.mg-1) by using the anion-exchange chromatography (e.g., DEAE-Cellulose, HiTrapTM Q XL columns) and size-exclusion chromatography (Superdex G-100). After the final purification step, a total activity of 532 U was acquired with a recovery of 8.3 % and purity of 9.6-fold. The molecular weight (Mw) of PleuLac was determined to be 35 kDa by SDS-PAGE electrophoresis. This enzyme exhibited an optimal activity at 40 ºC and pH of 5.5; it is stable at 25 ºC after incubation of 120 min and pH of 5.0. This purified and characterized PleuLac will serve for further application study on catalyzing the oxidation of essential oils to value-added products in combination with peroxidase.

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Published

19-09-2024

How to Cite

[1]
T. Q. Dang, V. H. Le, M. H. Le, and H. N. Do, “Purification and characterization of laccase from the white-rot fungus Pleurotus pulmonarius VAST02.42”, Vietnam J. Sci. Technol., vol. 62, no. 6, pp. 1089–1097, Sep. 2024.

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Section

Natural Products