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Korean Society for Biochemistry and Molecular Biology (생화학분자생물학회)
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Analysis of Differential-expressed Proteins of Acidithiobacillus ferrooxidans Grown under Phosphate Starvation

  • He, Zhiguo (School of Resources Processing and Bioengineering, Central South University) ;
  • Zhong, Hui (Cancer Research Institute, Central South University) ;
  • Hu, Yuehua (School of Resources Processing and Bioengineering, Central South University) ;
  • Xiao, Shengmu (School of Resources Processing and Bioengineering, Central South University) ;
  • Liu, Jiarshe (School of Resources Processing and Bioengineering, Central South University) ;
  • Xu, Jin (School of Resources Processing and Bioengineering, Central South University) ;
  • Li, Guiyuen (Cancer Research Institute, Central South University)
  • Published : 2005.09.30
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Abstract

Acidithiobacillus ferrooxidans is one of the most important bacterium used in bioleaching, and can utilize $Fe^{2+}$ or sulphide as energy source. Growth curves for Acidithiobacillus ferrooxidans under phosphate starvation and normal condition have been tested, showing lag, logarithmic, stationary and aging phases as seen in other bacteria. The logarithmic phases were from 10 to 32 hours for Acidithiobacillus ferrooxidans cultivated with normal cultivating condition and from 20 to 60 hrs for Acidithiobacillus ferrooxidans cultivated phosphate starvation. Differences of protein patterns of Acidithiobacillus ferrooxidans growing in case of normal or phosphate starvation were separately investigated after cultivation at $30^{\circ}C$ by the analysis of two-dimensional gel electrophoresis (2-DE), matrix-assisted laser desorption/ionization (MALDI)-Mass spectrometry. There were total 6 protein spots identified, which were Recombination protein recA, RNA helicase, AP2 domain-containing transcription factor, NADH dehydrogenase I chain D, Hyothetical protein PF1669, and Transaldolase STY3758. From the 6 identified protein spots, 3 proteins were found to be decreased in expression at the cultivating condition of phosphate starvation, while another three upregulated.

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References

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