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Position: Home > Articles > Expression in Pichia pastoris and Biological Activity Characterization of Recombinant Chicken IL-2 Chinese Agricultural Science Bulletin 2010,26 (18) 1-5

鸡IL-2的毕赤酵母表达和生物活性鉴定

作  者:
张鹏;王黎霞;安健
单  位:
北京农业职业学院畜牧兽医系;北京农学院动物科技系
关键词:
鸡IL-2;pPICZαA表达载体;毕赤酵母;分泌表达
摘  要:
IL-2是一种重要的免疫相关细胞因子,借助PCR去掉鸡IL-2基因片段(387bp)信号肽,连接到pPICZαA表达载体中,通过电转化转入Pichia酵母GS115菌株的感受态中,对筛选出来的阳性菌株以终浓度为1%的甲醇诱导表达,经SDS-PAGE及WesternBlot分析,结果表明酵母成功分泌表达了重组鸡IL-2,分子量为17.8kD。通过Ni-NTAHisBind柱层析,250mmol/L咪唑的洗脱液洗脱,得到纯度较高的重组鸡IL-2,淋巴细胞增殖试验证明,重组鸡IL-2具有明显的促进淋巴细胞增殖的生物活性,为进一步研究其免疫佐剂的作用提供了试验基础。
译  名:
Expression in Pichia pastoris and Biological Activity Characterization of Recombinant Chicken IL-2
作  者:
Zhang Peng1, Wang Lixia2, An Jian1 (1 Beijing Agriculture University, Beijing 102206; 2Beijing Vocational College of Agriculture, Beijing 102442)
关键词:
chicken IL-2; pPICZαA expression vector;Pichia pastoris ; secretory expression
摘  要:
Chicken IL-2 is a key cytokine for immunity. Removed the signal peptide by PCR, chIL-2 gene fragments (387 bp) was connected to the pPICZαA expression vector and transformed toPichia pastoris GS115 by electroporation. SDS-PAGE and Western Blot analysis showed that chIL-2 (17.8 kD) was successfully expressed and secreted by positive strains induced by 1% methanol. The chIL-2, which was purified by Ni-NTA His Bind column chromatography with 250 mmol/L imidazole elution buffer, had significant biological activity to promote lymphocyte proliferation, which provides the experimental basis for the further research on chIL-2 as a kind of immune adjuvant.

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