Difference between revisions of "Part:BBa K4244060"

Revision as of 08:47, 12 October 2022

Constitutive expression of sfGFP with OmpA secretion tag

sfGFP BBa_K4244004 was fused to OmpA BBa_K208003 (fused at the N-terminus) to secrete sfGFP and use it as an extracellular reporter. It is under an constitutive medium strength promoter BBa_K4244057.

Secretion assay

Figure 1: Time series measurement of total, pellet and supernatant fraction of sfGFP under the OmpA signal peptide expressed with constitutive promoter. Measurement was performed every two hours for eight hours. No significant fluorescence was detected in the supernatant fraction.

Discussion

No secretion was observed in E. coli Nissle. This may be due to the too high expression level of sfGFP under BBa_K4244057. This experiment still need adjustment and fine tuning to prove the secretion of sfGFP.

Sequence and Features