重组DNA
纳米笼
铁蛋白
格罗斯
互补DNA
包涵体
圆二色性
大肠杆菌
化学
格罗尔
生物化学
亲和层析
分子生物学
生物
酶
基因
催化作用
作者
Wenyan Zou,Xiaoyu Liu,Dianhua Chen,Jie Wang,Xi Zhao,Jiahuang Li,Lina Ji,Hua Zhang
标识
DOI:10.1080/10826068.2016.1141300
摘要
Based on their nanocage architectures, ferritins show their potential applications in medical imaging and therapeutic delivery systems. However, the recombinant human H-chain ferritin (rHF) is prone to form inclusion bodies in Escherichia coli. In our study, the cDNA of rHF was cloned into plasmid pET28a under the control of a T7 promoter. Molecular chaperones, including GroES, GroEL, and trigger factor, were coexpressed with rHF to facilitate its correct folding. The results showed that the solubility of rHF was increased more than threefold with the help of molecular chaperones. Taking advantages of its N-terminal His-tag, rHF was then purified with Ni-affinity chromatography. With a yield of 15 mg/L from bacterial culture, the purified rHF was analyzed by circular dichroism spectrometry for its secondary structure. Moreover, the rHF nanocages were characterized by transmission electron microscopy and dynamic light scattering. Our results indicate that rHF is able to self-assemble into nanocages with a narrow size distribution.
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