An enzyme showing alkaliphilic laccase activity was purified from the culture supernatant of Myrothecium verrucaria 24G-4. The enzyme was highly stable under alkaline conditions, showed an optimum reaction pH of 9.0 for 4-aminoantipyrine/phenol coupling, and decolorized synthetic dyes under alkaline conditions. It showed structural and catalytic similarities with bilirubin oxidase, but preferably oxidized phenolic compounds. The enzyme catalyzed veratryl alcohol oxidation at pH 9.0 with 2,2′-azino-bis(3- ethylbenzothiazoline-6-sulfonic acid) as a mediator, suggesting that the laccase mediator system functioned well under alkaline conditions. © 2003 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved.
Sulistyaningdyah, W. T., Ogawa, J., Tanaka, H., Maeda, C., & Shimizu, S. (2004). Characterization of alkaliphilic laccase activity in the culture supernatant of Myrothecium verrucaria 24G-4 in comparison with bilirubin oxidase. FEMS Microbiology Letters, 230(2), 209–214. https://doi.org/10.1016/S0378-1097(03)00892-9