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- W2419042046 abstract "Objective We cloned and expressed chicken interferon-gamma gene (chIFN-gamma), and detected the bioactivity of chIFN-gamma expressed in Escherichia coli (E. coli). Methods The chIFN-gamma mature protein gene was amplified by RT-PCR from spleen lymphocytes of chicken which were stimulated with concanavalin A (ConA) and then cloned into the prokaryotic expression vector pET-32a ( + ). Recombinant expression plasmid of pET-32a ( + )-chIFN-gamma was constructed and then transformed into the competent E. coli BL21 (DE3) cells for expression with IPTG induction. Purified soluble rchIFN-gamma proteins were obtained by Ni-NTA His Bind Resin affinity chromatography and identified by SDS-PAGE gel and Western blot assay. The antiviral activity was detected by MDCK-VSV system. Results A 456 bp cDNA encoding chIFN-gamma mature protein gene was cloned and successfully expressed in E. coli with approximate molecular weight of 31.0 kDa, which could be recognized by anti-His mAb and rabbit polyclonal antibody against chlFN-gamma. The recombinant chIFN-gamma proteins were expressed to form inclusion bodies with a portion of soluble protein. The soluble rchIFN-gamma proteins were purified by Ni-NTA column under a native condition with the yield of 3.0 mg/L. The purified recombinant chIFN-gamma (rchIFN-gamma) proteins by 1:32 dilution could resist 100 TCID50 VSV virus attack. Conclusion The purified rchIFN-gamma proteins by Ni-NTA column under a native condition had better antiviral activity, which will establish a basis for further developing new type antiviral interferon praeparatum." @default.
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- W2419042046 date "2009-01-01" @default.
- W2419042046 modified "2023-09-22" @default.
- W2419042046 title "[Soluble expression of chicken interferon-gamma and antiviral activity of purified expression product]" @default.
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