Biotechnology and Bioprocess Engineering

, Volume 18, Issue 1, pp 8–17 | Cite as

Proteomics approach to decipher novel genes and enzymes characterization of a bioelectricity-generating and dye-decolorizing bacterium Proteus hauseri ZMd44

  • I. -Son Ng
  • Xuesong Zheng
  • Bor-Yann Chen
  • Xiaoqin Chi
  • Yinghua Lu
  • Chun-Sheng Chang
Research Paper


The first-attempt study employed a proteomics strategy for the identification of abundant proteins from a bioelectricity generation and dye decolorization bacterium Proteus hauseri ZMd44. By using the degenerated primers designed based on the peptide sequences from tandem mass spectroscopy and the whole genomics annotation of the closely associated strain, Proteus penneri ATCC 35198, the genes were successfully obtained for two full-length genes of 543 bp (laccase) and 1,086 bp (Omp F, porin) encoding to 181 amino acids and 362 amino acids, respectively. It explored laccase and NADH dehydrogenase involvement in the oxidation-reduction reaction as well, as porin played an important role in providing channels for related proteins in the accomplishment of electron transportation in P. hauseri. Detailed enzymatic assays indicated that laccase activity of 542.2 U/DCW could be stimulated by 2.5 mM copper induction in LB medium (ca. 293-fold to those without copper induction). Among intracellular proteins, NADH dehydrogenase activity of 257.2 U/mg via mediator riboflavin was in parallel with the decolorizing capability of azo dye Rb160 that only took place in LB medium. From the evaluation of kinetic parameters (Vmax and Km were 0.272 U/min and 0.393 mM with ABTS, 0.046 U/min and 43.8 μM with NADH), it is better to decipher the decolorization mechanism of ZMd44 indicating that laccase and NADH dehydrogenase played the most crucial role for azo dye decolorization.


Proteus hauseri proteomics laccase porin NADH dehydrogenase azo dye decolorization 


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Copyright information

© The Korean Society for Biotechnology and Bioengineering and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • I. -Son Ng
    • 1
    • 2
  • Xuesong Zheng
    • 1
  • Bor-Yann Chen
    • 3
  • Xiaoqin Chi
    • 1
  • Yinghua Lu
    • 1
    • 2
  • Chun-Sheng Chang
    • 4
  1. 1.Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenChina
  2. 2.The Key Laboratory for Synthetic Biotechnology of Xiamen CityXiamen UniversityXiamenChina
  3. 3.Department of Chemical and Materials EngineeringNational I-Lan UniversityI-LanTaiwan
  4. 4.Department of BiotechnologySouthern Taiwan University of Science TechnologyTainan CountyTaiwan

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