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Part:BBa_K1129022

Designed by: UBC iGEM 2013   Group: iGEM13_British_Columbia   (2013-09-16)
Revision as of 00:17, 29 October 2013 by Joeho604 (Talk | contribs)

Enoyl-CoA hydratase/aldolase (Ech) under pTET constitutive promoter


Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 7
    Illegal NheI site found at 30
    Illegal NotI site found at 816
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal NgoMIV site found at 245
    Illegal NgoMIV site found at 263
    Illegal NgoMIV site found at 302
    Illegal AgeI site found at 239
  • 1000
    COMPATIBLE WITH RFC[1000]


Background

Ferulic acid is best utilized as a precursor for synthesis of aromatic compounds such as vanillin, which involves 2 enzymes: the conversion of ferulic acid to feruloyl-CoA by feruloyl-CoA synthetase (fcs) enzymes BBa_K1129001 and the conversion of feruloyl-CoA into vanillin by enoyl-CoA hydratase/aldolase (ech) enzymes [1]. BBa_K1129002 is a enoyl-CoA hydratase/aldolase (ech) from Pseudomonas putida KT2440 which converts feruloyl CoA to vanillin[2].

BBa_K1129022 expression is under the control of an arabinose promoter.


Experimental Data

Ech and fcs genes( BBa_K1129022 and BBa_K1129024), both of which are under constitutive promoters (BBa_J23118), were ligated into one pSB1C3 plasmid. An overnight culture of E.coli 10G cells harboring this plasmid was inoculated into a fresh culture of 5mL minimal media containing ferulic acid. Cells were then harvested for GC-MS after 7 hours of growth.



Ech900.jpg


Figure 1 Compound generation identification by Gas Chromatography Mass Spectometry . Chromatograms(left) and mass spectra(Right) for select peaks are shown. Structures represent predictions based on library matching or comparison to standards. Controls represent plasmids missing the gene of interest. A) Internal control using vanillin(10.486). B) Conversion of Ferulic acid to vanillin acid by constitutive expressed Fcs and Ech through the Feuroyl CoA intermediate, not shown. C) Conversion of Ferulic acid to vanillin acid by Arabinose inducible expressed Fcs and Ech through the Feuroyl CoA intermediate, not shown.


References


[1] Priefert,H., Rabenhorst, J., Steinbiichel, A. (2001). Biotechnological production of vanillin. Appl Microbiol Biotechnol, 56, 296-314.


[2] Plaggenborg, R., Overhage, J., Steinbuchel, A. (2003). Functional analyses of genes involved in the metabolism of ferulic acid in Pseudomonas putida KT2440. Appl Microbiol Biotechnol, 61,528-535.

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