High-level secretory expression of metchnikowin in Escherichia coli
文献类型: 外文期刊
第一作者: Wu, Di
作者: Wu, Di;Lu, Yinghu;Ma, Lijuan;Che, Yuanyuan;Zha, Xiangdong;Yao, Bin;Huang, Huoqing;Yang, Peilong
作者机构:
关键词: Metchnikowin;Antimicrobial peptide;Secretory expression;Asp-Pro cleavage
期刊名称:PROTEIN EXPRESSION AND PURIFICATION ( 影响因子:1.65; 五年影响因子:1.548 )
ISSN: 1046-5928
年卷期: 2013 年 91 卷 1 期
页码:
收录情况: SCI
摘要: Metchnikowin is a proline-rich peptide from Drosophila with antibacterial and antifungal activities. Its commercial application is limited due to the low immune-inducible expression in vivo. Here we present a method to produce high-yield metchnikowin in recombinant Escherichia coli. The genes coding for metchnikowin and the fusion partner Cherry tag were subcloned into the pET22b vector to construct a recombinant expression plasmid and transformed into E. coli BL21 (DE3). The fusion protein was successfully expressed and secreted with a yield of 300 mu g/ml after 18-h induction. Active metchnikowin was released by cleavage of the Asp-Pro bond between fused proteins by 72-h formic acid hydrolysis at 50 degrees C. After 24-h dialysis, metchnikowin was purified to electrophoretic homogeneity and showed significant antibacterial activities against both Bacillus subtilis and E. coli DH5 alpha. It is the first report on efficient production of metchnikowin in recombinant E. coli. (C) 2013 Elsevier Inc. All rights reserved.
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