期刊
PROCESS BIOCHEMISTRY
卷 111, 期 -, 页码 315-324出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.procbio.2021.11.016
关键词
Streptomyces; Enzymes; Laccases; Multicopper oxidases; Genome sequencing; Functional screening
资金
- Ministry of Higher Ed-ucation and Scientific Research (Algeria)
- General Directorate of Scientific Research and Technological Development (Algeria)
Novel laccase enzymes were discovered in Algeria with appealing catalytic properties, including two thermostable laccases purified and characterised from a newly isolated Streptomyces strain. The genome of the strain also contained genes for lignin-degrading enzymes, revealing metabolic potential for various applications.
In discovering novel laccase enzymes with interesting catalytic and stability properties, there is still scope for improvement in exploring new sites in Algeria. The bio-prospecting approach allowed the isolation of a novel strain, Streptomyces sp. HBD30 from the Agrioun River, northern Algeria. Following a functional approach, two laccases (LacI and LacII) were purified and characterised, showing appealing properties as thermostable en-zymes, and oxidised typical phenolic and non-phenolic substrates with a higher affinity towards syringaldazine, followed by 2,6-dimethoxyphenol and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid). Further analyses revealed that the Streptomyces sp. HDB30 genome contained an array of genes coding for carbohydrate active enzymes (CAZome) and lignin-degrading enzymes to degrade lignocellulose. In addition to enlarging the repertoire of thermostable laccases, this study uncovered the metabolic potential of a new Streptomyces strain, which is useful for a wide range of applications.
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