期刊
JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY
卷 19, 期 9, 页码 966-971出版社
KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY
DOI: 10.4014/jmb.0901.018
关键词
Coprinus cinereus peroxidase; promoter; Pichia pastoris; heterologous expression; recombinant peroxidase
资金
- Korea Research Institute of Chemical Technology (KRICT), Kwangwoon University
- Korean Government (MOEHRD, Basic Research Promotion Fund) [KPF-2008-314-D00081]
Peroxidase from Coprinus cinereus (CiP) has attracted attention for its high specific activity and broad substrate spectrum compared with other peroxidases. In this study, the functional expression of this peroxidase was successfully achieved in the methylotrophic yeast Pichia pastoris. The expression level of CiP was increased by varying the microbial hosts and the expression promoters. Since a signal sequence, such as the alpha mating factor of Saccharomyces cerevisiae, was placed preceding the cDNA of the CiP coding gene, expressed recombinant CiP (rCiP) was secreted into the culture broth. The Mut(+) Pichia pastoris host showed a 3-fold higher peroxidase activity, as well as 2-fold higher growth rate, compared with the Mut(S) Pichia pastoris host. Furthermore, the AOX1 promoter facilitated a 5-fold higher expression of rCiP than did the GAP promoter.
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