Part:BBa_K553001
A. tumefaciens TraI - OC8 HLA synthase
The Agrobacterium tumefaciens TraI synthase generates the OC8 HLA.
The gene is located on the Ti plasmid together with TraR (BBa_K553000), the other regulatory component of A. Tumefaciens quorum sensing.
Sequence and Features No part name specified with partinfo tag.
Download Datasheet
Improvement and Characterization
Group: [http://2017.igem.org/Team:TokyoTech Tokyo Tech 2017]
Author: Takuma Yasue
Summary of Improvement and Characterization
We found that the wild type TraI(BBa_K553001) did not suit for our genetic circuits because enzyme activity was weak. Thus, we constructed the improved TraI(BBa_K2505033) appropriate to our final circuits.
Result
The result of C8 production using the wild type TraI and mutants is shown in Figure 6. The RFU value of the TraI (K34G)-expressing cells was approximately 3-fold higher than that of the TraI-expressing cells. Other mutant didn’t show improvement of 3OC8HSL production. It was caluculated from calibration curve that the wild type TraI produced 28nM of C8 and TraI (K34G) produced 42nM of C8.
For more information, visit our page: [http://2017.igem.org/Team:TokyoTech/Experiment/TraI_Improvement TraI_Improvement page].
Discussion
In the previous study, it was showned that the E34G mutation of LuxI most likely enhances the interactions between the enzyme and the acyl-ACP substrate. Therefore, we thought that K34G mutation of TraI also has the same effect.
Taken together, we conclude that we could successfuly increase the productivity of C8. Notably, generation and functional identification the mutant TraI, TraI (K34G), meet the medal criteria of ”parts improvement”, because the wild-type traI parts was registered in iGEM parts collection earlier. However, further improvement of C8 production is necessary to transmit the signal from bacteria to mammalian cells. Such improvement is possible through tuning the experimental conditions further.
| None |