Increases of ferrous iron oxidation activity and arsenic stressed cell growth by overexpression of Cyc2 in Acidithiobacillus ferrooxidans ATCC19859
文献类型： 外文期刊
作者： Liu, Wei 1 ; Lin, Jianqun 1 ; Pang, Xin 1 ; Mi, Shuang 1 ; Cui, Shuang 1 ; Lin, Jianqiang 1 ;
作者机构： 1.Shandong Univ, State Key Lab Microbial Technol, Jinan 250100, Peoples R China
2.Shandong Acad Agr Sci, Inst Agrofood Sci & Technol, Jinan, Peoples R China
3.Neusoft Co, Shenyang, Peoples R China
4.Shandong Univ, Sch Med, Jinan 250100, Peoples R China
关键词： Acidithiobacillus ferrooxidans;cyc~2;conjugation;ferrous iron oxidation;bioleaching
期刊名称：BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY （ 影响因子：2.431； 五年影响因子：2.124 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： Acidithiobacillus ferrooxidans plays an important role in bioleaching in reproducing the mineral oxidant of ferric iron (Fe~(3+)) by oxidization of ferrous iron (Fe~(2+)). The high-molecular-weight c-type cytochrome Cyc~2 that is located in the external membrane is postulated as the first electron carrier in the Fe~(2+) oxidation respiratory pathway of A. ferrooxidans. To increase ferrous iron oxidation activity, a recombinant plasmid pTCYC2 containing cyc~2 gene under the control of Ptac promoter was constructed and transferred into A. ferrooxidans ATCC19859. The transcriptional level of cyc~2 gene was increased by 2.63-fold and Cyc~2 protein expression was observed in the recombinant strain compared with the control. The ferrous iron oxidation activity and the arsenic stressed cell growth of the recombinant strain were also elevated.
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