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Nemati, F., Arabian, D., Khalilzadeh, R., Abbaspour Aghdam, F. (2014). Enhancing iron oxidation efficiency by a native strain of Acidithiobacillus ferrooxidans via response surface methodology, and characterization of proteins involved in metal resistance by proteomic approach. Journal of Applied Biotechnology Reports, 1(1), 28-38.
Fahimeh Nemati; Daryoush Arabian; Rasool Khalilzadeh; Fazin Abbaspour Aghdam. "Enhancing iron oxidation efficiency by a native strain of Acidithiobacillus ferrooxidans via response surface methodology, and characterization of proteins involved in metal resistance by proteomic approach". Journal of Applied Biotechnology Reports, 1, 1, 2014, 28-38.
Nemati, F., Arabian, D., Khalilzadeh, R., Abbaspour Aghdam, F. (2014). 'Enhancing iron oxidation efficiency by a native strain of Acidithiobacillus ferrooxidans via response surface methodology, and characterization of proteins involved in metal resistance by proteomic approach', Journal of Applied Biotechnology Reports, 1(1), pp. 28-38.
Nemati, F., Arabian, D., Khalilzadeh, R., Abbaspour Aghdam, F. Enhancing iron oxidation efficiency by a native strain of Acidithiobacillus ferrooxidans via response surface methodology, and characterization of proteins involved in metal resistance by proteomic approach. Journal of Applied Biotechnology Reports, 2014; 1(1): 28-38.

Enhancing iron oxidation efficiency by a native strain of Acidithiobacillus ferrooxidans via response surface methodology, and characterization of proteins involved in metal resistance by proteomic approach

Article 9, Volume 1, Issue 1, Winter 2014, Page 28-38  XML PDF (356.84 K)
Document Type: Original Article
Authors
Fahimeh Nemati1; Daryoush Arabian email 2; Rasool Khalilzadeh2; Fazin Abbaspour Aghdam3
1Islamic Azad University, Pharmaceutical Sciences Branch, Tehran, Iran
2Department of Bioscience and Biotechnology, Malek Ashtar University of Technology, Tehran, Iran
3Faculty of Chemical Engineering, Sahand University of Technology, Tabriz, Iran
Receive Date: 09 February 2014,  Revise Date: 10 March 2014,  Accept Date: 10 March 2014 
Abstract
The effects of different factors on growth and bio-oxidation efficiency of a native strain of Acidithiobacillus ferrooxidans have been evaluated by the utilization of response surface methodology, RSM. Medium pH and iron concentration were found to be the most significant factors while temperature and ammonia concentrations had the least weight within the ranges investigated. Optimum operational conditions for maximizing Fe2+ oxidation were found to be 31 oC, 7 g/Liron concentration, 4.5 g/Ltotal ammonium salt concentration and medium pH 1.85. Maximum recovery of 98% of Zinc is the main outcome of results as observed at 7 g/Lof Fe2+, under optimized experimental conditions. The response of a bacterial strain to metals toxicity also studied.  The isolate showed good resistance to most of the toxic metals. The proteomics approach was used to identify the differentially expressed proteins under heavy metal stress. Four of the differentially expressed proteins were identified as major outer membrane protein of A. ferrooxidans, ribulose large bisphosphate carboxylase subunit, and holo synthase.
Keywords
Acidithiobacillus ferrooxidans; Bioleaching; Mass spectrometry
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