Generator

Part:BBa_K1602006

Designed by: Alexandra Goretzki, Tanja Habeck, Nina Kuschik-Maczollek, Laurin Monnheimer, Steven Pilger, Bianca Reisinger, Daniel Stumpf   Group: iGEM15_TU_Darmstadt   (2015-09-08)
Revision as of 20:58, 15 September 2015 by StevenPi (Talk | contribs) (added results)

Inducible itaconic acid producing operon (only cadA)

Itaconic acid is an organic, dicarboxylic acid that is biotechnologically synthesized most commonly in Aspergillus terreus. It is derived from citric acid via 2 intermediates and a final decarboxylation.
To enable this pathway in Escherichia coli it is necessary to introduce 1 genes. This gene is taken from the genome Apergillus terreus. It is coding for a cis-aconitate decarboxylase (cadA). An Enzyme that catalyzes the following chemical reaction:

Figure 1 Reaction scheme of the itaconic acid producing operon (only cadA). The substrate for the reaction is cis-aconitate. Cis-aconitate is metabolized to itaconic acid in 1 step by decarboxylation.



Usage

This part is a composite of one coding genes, provided with a strong RBS (BBa_B0034) and under control of a T7 Promoter (BBa_I719005). Optimization of this operon may be possible through introduction of 2 more genes. Namely gltA (BBa_K1602001) and acnA (BBa_K1602002).


Figure 2 Genetic map of the itaconic acid producing operon (only cadA) with T7 promoter. This brick enables E.Coli BL21 cells to synthesize itaconic acid in presence of the inductor IPTG.


Results

The expression of cadA has been visualized via a SDS-PAGE:

Figure 3 Scan of the PAGE containing from left to right a marker (M; Protein Marker III AppliChem), the positive sample (1) and a negative control (2). The picture was cropped and edited for clarification purposes.
Figure 4 Plot of the gel lanes based on contrast analyses - created with ImageJ


Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]
[edit]
Categories
//awards/part_collection/2015
Parameters
None