Abstract
Laccases (EC 1.10.3.2) are multicopper polyphenol oxidases found in various organisms, in particular, in fungi. Fungal laccases are encoded by multigene families, which can contain up to 17 genes. However, not all isozymes can be obtained from native producers. Previous studies have shown that the filamentous fungus Penicillium canescens is a promising object for the heterologous expression of various laccase isozymes of Trametes hirsuta 072. In this work, the cultivation conditions of P. canescens strains, recombinant producers of T. hirsuta heterologous minor laccase, are optimized. The optimization of the rLacD and rLacF purification method increased their yield and specific activity of rLacD. In addition, the melting points of minor laccase isoenzymes are measured and the glycosylation of isoenzymes is studied.
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