Metal-Binding Activity of the Soluble Recombinant Pig Metallothionein 1A Expressed in Escherichia coli

Metal-Binding Activity of the Soluble Recombinant Pig Metallothionein 1A Expressed in Escherichia coli
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大肠杆菌中表达的可溶性重组猪金属硫蛋白 1A 的金属结合活性

DOI:
10.1007/s12011-012-9470-1
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发表时间:
2012-07
影响因子:
3.9
通讯作者:
Jun Bao
Jun Bao
中科院分区:
生物学3区
文献类型:
--
作者:
Dongbo Sun;Hong Zhang;Guojun Wu;Qinghe Zhu;Siwen Lv;Rui Wu;Jun Bao

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根据Genbank中猪金属硫蛋白1A(MT 1A)基因序列,合成了猪MT 1A基因的全长cDNA,并将其克隆到pMD 18-T载体中。经序列分析和结构预测,将pMT 1A基因克隆到含有His标签的载体pET-32a(+)中。使用大肠杆菌Rosetta™(DE 3)plysS细胞以可溶形式表达重组pMT 1A(rpMT 1A)。Western blotting结果表明,纯化的rpMT 1A蛋白可与抗His标签单克隆抗体结合。进一步的研究表明,rpMT 1A蛋白与二价金属离子铜(Cu² C)、锌(Zn² C)和镉(Cd² C)表现出高的金属结合活性。
Full-length cDNA for the pig metallothionein 1A (pMT1A) gene was synthesized based on the pig MT1A gene sequence in Genbank and cloned into the pMD18-T vector. After sequence analysis and structure prediction, the pMT1A gene was cloned into vector pET-32a (+) containing a His-tag. The recombinant pMT1A (rpMT1A) was expressed in a soluble form using Escherichia coli Rosetta™ (DE3) plysS cells. Western blotting showed that the purified rpMT1A protein bound an anti-His-tag monoclonal antibody. Further investigation revealed that the rpMT1A protein showed high metal-binding activity with the divalent metal ions copper (Cu²⁺), zinc (Zn²⁺), and cadmium (Cd²⁺).
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发表时间: 1999-08-01
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