Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/22246
Tipo: Artigo
Título: Characterization of a thermotolerant laccase produced by Streptomyces sp. SB086
Autor(es): Fernandes, Tatiana Alves Rigamonte
Silveira, Wendel Batista da
Passos, Flávia Maria Lopes
Zucchi, Tiago Domingues
Abstract: Laccases have become desirable enzymes for application in many industrial processes. Nowadays, most of these enzymes are obtained from fungi. Among prospective studies for bacterial laccase genes, some have included actinomycetes, but only a few studies have characterized the enzyme produced. Thus, we have isolated a laccase-producing actinomycete from forest soil under restoration process and further aimed to characterize its produced enzyme. The isolate SB086 was assigned to the Streptomyces genus by a combination of phenotypical, chemical and phylogenetic properties. Our data indicate that the bacterium produces a thermotolerant laccase. The maximum activity was obtained in the pH range 4.0–5.0 and at 50 °C in reaction mixture containing 5 mM CuSO4; thermal stability was noted at 60 °C and 70 °C—a well-desired characteristic for industry. The active enzyme presented a high molecular mass (over 100 kDa) and was less sensitive to inhibition by metal ions than generally described for bacterial laccases. Our findings support in silico data of bacterial laccase secretion, and reinforce the view that actinomycetes may be a rich source of laccase for industrial application.
Palavras-chave: Actinobacteria
Laccase
Lignin degradation
Multicopper oxidase
Editor: Annals of Microbiology
Tipo de Acesso: Springer Nature Switzerland AG.
URI: http://dx.doi.org/10.1007/s13213-013-0781-z
http://www.locus.ufv.br/handle/123456789/22246
Data do documento: 28-Dez-2013
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