Part:BBa_K909007
TetR DNA binding domain containing BamHI site for protein fusions
Truncated version of tetracycline repressor TetR, consisting of 1 – 127 amino acids, containing DNA binding domain. The rest of the protein, alpha 8-10 helices responsible for tetR dimerization. Without dimerization domain, tetR-DBD fails to bind TetR responsive promoter efficiently and unable to repress transcription of reporter protein (see figure). However, TetR-DBD fusion with UVR8 protein (BBa_K909008) restores TetR-DBD promoter binding.
Usage and Biology
We introduced BamHI site at C terminus of tetR-DBD for an easy in frame fusions with other proteins. This can easily be used as a two hybrid system to detect homo/heterodimers in E. coli, and, in principle, one can use these fusions to turn protein-protein interaction into the repression of transcription. Furthermore, inducible dimerization can lead to a novel switch like behaviors of the system (e.g. [http://2012.igem.org/Team:ETH_Zurich ETH Zurich 2012 team] created a novel UV-B inducible-ON switch).
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21INCOMPATIBLE WITH RFC[21]Illegal BamHI site found at 382
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
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