Microbial transformation of benzene to cis-3,5-cyclohexadien-1,2-diols by recombinant bacteria harboring toluene dioxygenase gene tod

Appl Microbiol Biotechnol. 2007 Feb;74(1):43-9. doi: 10.1007/s00253-006-0637-6. Epub 2006 Oct 5.

Abstract

Toluene dioxygenase (TDO) catalyzes asymmetric cis-dihydroxylation of aromatic compounds. To achieve high efficient biotransformation of benzene to benzene cis-diols, Pseudomonas putida KT2442, Pseudomonas stutzeri 1317, and Aeromonas hydrophila 4AK4 were used as hosts to express TDO gene tod. Plasmid pSPM01, a derivative of broad-host plasmid pBBR1MCS-2 harboring tod from plasmid pKST11, was constructed and introduced into the above three strains. Their abilities to catalyze the biotransformation of benzene to benzene cis-diols, namely, cis-3,5-cyclohexadien-1,2-diols abbreviated as DHCD, were examined. In shake-flask cultivation under optimized culture media and growth condition, benzene cis-diols production by recombinant P. putida KT2442 (pSPM01), P. stutzeri 1317 (pSPM01), and A. hydrophila 4AK4 (pSPM01) were 2.68, 2.13, and 1.17 g/l, respectively. In comparison, Escherichia coli JM109 (pSPM01) and E. coli JM109 (pKST11) produced 0.45 and 0.53 g/l of DHCD, respectively. When biotransformation was run in a 6-l fermenter, DHCD production in P. putida KT2442 (pSPM01) was approximately 60 g/l; this is the highest DHCD production yield reported so far.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aeromonas hydrophila / enzymology
  • Aeromonas hydrophila / genetics
  • Aeromonas hydrophila / metabolism*
  • Benzene / metabolism*
  • Biotechnology / methods*
  • Cyclohexanols / metabolism*
  • Fermentation
  • Genetic Engineering / methods
  • Oxygenases / genetics
  • Oxygenases / metabolism*
  • Plasmids / genetics
  • Pseudomonas putida / enzymology*
  • Pseudomonas putida / genetics
  • Pseudomonas putida / metabolism
  • Pseudomonas stutzeri / enzymology*
  • Pseudomonas stutzeri / genetics
  • Pseudomonas stutzeri / metabolism
  • Recombinant Proteins / genetics
  • Recombinant Proteins / metabolism

Substances

  • Cyclohexanols
  • Recombinant Proteins
  • Oxygenases
  • toluene dioxygenase
  • Benzene