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- W2949779876 abstract "The regulatory gene (aflR) encodes AflR, a positive regulator of transcriptional pathway that activates aflatoxin biosynthesis. It has been demonstrated in our laboratory that L-Asp-L-Asn (DN) extracted from Bacillus megaterium inhibited the growth of Aspergillus flavus. We fused gene encoding DN with the gene encoding specific dinuclear zinc finger cluster protein of AflR, then fusion protein competed with the AflS-AflR complex for the AflR binding site and significantly improved anti-A. flavus activity (growth of A. flavus and biosynthesis of aflatoxin B1) of DN. The fusion gene dn-aflR was cloned into pET32a and recombinant plasmid was introduced into Escherichia coli BL21. The highest expression was observed after 10 h induction and fusion protein was purified by affinity chromatography column. Compared with DN, the novel fusion protein DN-AflR significantly inhibited the growth of A. flavus and biosynthesis of aflatoxin B1 (P < 0.05). This study promoted the use of competitive inhibition of fusion proteins to reduce the expression of regulatory genes in the biosynthetic pathway of aflatoxin. Moreover, it provided more supports for deep research and industrialization of such novel anti-A. flavus bio-inhibitors and biological control of microbial contamination." @default.
- W2949779876 created "2019-06-27" @default.
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- W2949779876 date "2019-02-01" @default.
- W2949779876 modified "2023-09-23" @default.
- W2949779876 title "Fusion expression and anti-Aspergillus flavus activity of a novel inhibitory protein DN-AflR" @default.
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- W2949779876 doi "https://doi.org/10.1016/j.ijfoodmicro.2018.10.015" @default.
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