vgb promoter, microaerobic
vgb promoter is induced under microaerobic conditions.
Sequence and Features
- 10COMPATIBLE WITH RFC
- 12COMPATIBLE WITH RFC
- 21COMPATIBLE WITH RFC
- 23COMPATIBLE WITH RFC
- 25COMPATIBLE WITH RFC
- 1000COMPATIBLE WITH RFC
Contribution From AHUT_China 2021
- Group: iGEM21_AHUT_China
- Author: Binbin Wu
- Summary: We validated an existing part of the hypoxia-inducible promoter vgb (BBa_K561001) and added the results to the corresponding BioBricks. All of this may help other teams. We hope it will make a contribution to the IGEM community.
Based on the sequence of BBa_K561001, we demonstrated the function of vgb promoter to express the target protein in E. coli low oxygen conditions, and the results were showed as follows:
The plasmid containing vgb promoter were constructed and transformed into E. coli BL21(DE3), then the transformed E. coli were screened using Kanamycin that was added to the LB medium. Fig. 1 showed that many colonies were grown on the plate, proving that the plasmid was transformed successfully into E.coli.
A single positive clone was cultured in LB medium overnight, and then 30μl of bacterial solution were added to 3 mL of LB medium and cultured for about 8 hours in low oxygen conditions. The whole bacteria protein and supernant protein were collected followed by Western blot identification. The results were shown in Fig. 2. It revealed that under the function of the vgb promoter, our target gene could be successfully expressed in E. coli.
In conclusion, the target protein could be induced in E. coli under the control of the vgb promoter under low oxygen conditions.