Study on metal binding capacity of the freshwater crab Sinopotamon henanense's recombinant copper specific binding metallothionein expressed in Escherichia coli

doi:10.1007/s10646-021-02470-x

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標題:	Study on metal binding capacity of the freshwater crab Sinopotamon henanense's recombinant copper specific binding metallothionein expressed in Escherichia coli
作者:	Wang, Lu Yang, Hui Zhen Ma, Wen Li Chen, Chien Min Wang, Lan
貢獻者:	Shanxi Univ, Sch Life Sci Shanxi Agr Univ, Coll Vet Med Chia Nan Univ Pharm & Sci, Dept Environm Resources Management
關鍵字:	Sinopotamon henanense Copper specific binding metallothionein Molecular modeling Bioremediation
日期:	2021
上傳時間:	2023-11-11 11:44:20 (UTC+8)
出版者:	SPRINGER
摘要:	The copper specific binding metallothionein (CuMT) is a type of cysteine-rich, metal-binding, small protein which plays an important role in Cu2+ metabolism in vertebrates. In this study, we investigated the metal tolerance and removing ability of recombinant strains harboring CuMT obtained in vivo from the freshwater crab Sinopotamon henanense (ShCuMT) in order to study its physiological functions and metal binding capacity. We performed a 3D modeling of ShCuMT and created its structural and functional models using the I-TASSER program. The shCumt gene was inserted into a pGEX-4t-1 vector and recombinant soluble ShCuMT was expressed in Escherichia coli. In addition, in order to characterize the tolerance and removing ability of heavy metals in E. coli with ShCuMT expression, the recombinant strains harboring ShCuMT were exposed to various concentrations of Cd2+, Cu2+ and Zn2+, respectively. The results showed that ShCuMT contains transition metal binding sites. In addition, E. coli cells expressing ShCuMT exhibited enhanced metal tolerance and higher removing ability of metal ions than control cells. However, compared with Cd2+ and Zn2+, E. coli cells expressing ShCuMT have stronger tolerance and higher removing ability of Cu2+. In general, ShCuMT contains multiple transition metal binding sites, and it could enhance tolerance and removing ability of metal ions. Therefore, ShCuMT can provide potential candidates for heavy metal bioremediation. This research on the metal binding properties of ShCuMT provides a scientific basis for bioremediation of heavy metal pollution by the recombinant strains. [GRAPHICS] .
關聯:	ECOTOXICOLOGY, v.31, n.1, pp.149-160
显示于类别:	[環境資源管理系(所)] 期刊論文

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