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Purification, characterization and declorization of bilirubin oxidase from Myrothecium verrucaria 3.2190

Permanent URL:
http://handle.nal.usda.gov/10113/58581
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Abstract:
Myrothecium verrucaria 3.2190 is a nonligninolytic fungus that produces bilirubin oxidase. Both Myrothecium verrucaria and the extracellular bilirubin oxidase were tested for their ability to decolorize indigo carmine. The biosorption and biodegradation of the dye were detected during the process of decolorization; more than 98% decolorization efficiency was achieved after 7 days at 26 degrees C. Additionally, the crude bilirubin oxidase can efficiently decolorize indigo carmine at 30 degrees C~50 degrees C, pH 5.5~9.5 with dye concentrations of 50 mgl-1~200 mgl-1. Bilirubin oxidase was purified and visualized as a single band on native polyacrylamide gel electrophoresis (PAGE). Several enzymatic properties of the purified enzyme were investigated. Moreover, the identity of the purified bilirubin oxidase (BOD) was confirmed by matrix assisted laser desorption ionisation time-of-flight mass spectrometry (MALDI-TOF-MS). These results demonstrate that the purified bilirubin oxidase in Myrothecium verrucaria strain has potential application in dye effluent decolorization.
Author(s):
Xu Han , Min Zhao , Lei Lu , Yanhong Liu
Subject(s):
Myrothecium verrucaria , bilirubin , biochemical oxygen demand , biodegradation , biosorption , decolorization , desorption , dyes , fungi , indigo carmine , ionization , mass spectrometry , pH , polyacrylamide gel electrophoresis
Source:
Fungal biology 2012 8 1 v.116 no.8
Language:
English
Year:
2012
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.