Characterization of the acid stress response of Acidithiobacillus ferrooxidans ATCC 23270 based on the method of microarray
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چکیده
Bioleaching is the extraction of specific metals from ores by using bacteria. The typical bioleaching strain Acidithiobacillus ferrooxidans utilizes energy from the oxidation of ironand sulfur-containing minerals (Baker & Banfield, 2003) and grows around pH 2.0. As bacteria grow optimally within a specific narrow range of pH, the fluctuation of environmental acidity can bring certain disadvantageous impacts on both growth and activity of the bacteria. However, the extracellular environment of A. ferrooxidans is rarely optimal in industrial practice, usually over acid, leading to restrained growth and weakened activity. It was reported that the acidophiles require a neutral intracellular pH, just like the neutralophiles (BakerAustin & Dopson, 2007), though acidophiles stand low pH, raising questions regarding their ability to Characterization of the acid stress response of Acidithiobacillus ferrooxidans ATCC 23270 based on the method of microarray
منابع مشابه
Isolation and characterization of Acidithiobacillus ferrooxidans strain D3-2 active in copper bioleaching from a copper mine in Chile.
Acidithiobacillus ferrooxidans strain D3-2, which has a high copper bioleaching activity, was isolated from a low-grade sulfide ore dump in Chile. The amounts of Cu(2+) solubilized from 1% chalcopyrite (CuFeS(2)) concentrate medium (pH 2.5) by A. ferrooxidans strains D3-2, D3-6, and ATCC 23270 and 33020 were 1360, 1080, 650, and 600 mg x l(-1) x 30 d(-1). The iron oxidase activities of D3-2, D3...
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