生物学杂志

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重组人白细胞介素-2的原核可溶表达

  

  1. 上海华新生物高技术有限公司,上海 201206
  • 出版日期:2018-02-18 发布日期:2018-02-18
  • 作者简介:李冠英,研发工程师,主要从事分子生物学及蛋白纯化的研究,E-mail:ligy@huaxin-bio.com
  • 基金资助:
    上海张江国家自主创新示范区专项发展资金(201411-PD-JQ-C104-013)

Soluble expression recombinant human interleukin-2 in Escherichia coli

  1. Shanghai Huaxin High Biotechnology Inc., Shanghai 201206, China
  • Online:2018-02-18 Published:2018-02-18

摘要: 为探索白细胞介素-2在大肠杆菌中的可溶表达及其生物学活性,利用载体pMAL-c5x将 rhIL-2与MBP融合,在大肠杆菌BL21(DE3)中诱导MBP-rhIL2的表达。接着用Amylose树脂将MBP-rhIL2纯化,最后利用Factor Xa蛋白酶将rhIL-2从融合蛋白中释放。结果显示: MBP-rhIL2以可溶形式表达;Factor Xa成功将rhIL-2从融合蛋白中释放出来;经生物学活性测定,其比活性为4.4×106 IU/mg。

关键词: 白细胞介素-2, 可溶表达, 蛋白纯化

Abstract: This work aims to explore the soluble expression and biological activity of interleukin-2; recombinant fusion protein MBP-rhIL2 was successfully expressed into soluble form in E.coli BL21 (DE3). The purification of MBP-rhIL2 was conducted through amylose resin. The rhIL-2 was efficiently released by the cleavage of protease Factor Xa from the fusion protein. Bioactivity analysis showed the biological activity of purified rhIL-2 is 4.4 ×106 IU/mg.

Key words: Interleukin-2, soluble expression, protein purification