Part:BBa_K2244005:Design
LEV1 repressor
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal AgeI site found at 677
- 1000COMPATIBLE WITH RFC[1000]
Design Notes
When designed the gene sequence of this fusion protein, the entire sequence of VVD, containnig a light-oxygen-voltage (LOV) domain & N cap, was added to the N-terminal of DNA-binding domain of LexA repressor. The C-terminal domain of lex repressor was removed.
Source
LEV1 repressor is a fusion protein of VVD and LexA, LexA repressor is a transcriptional repressor of SOS regulon in E.coli. It’s form chromosome of Escherichia coli str. K-12 substr. MG1655 (strain: K-12, substrain: MG1655) LexA autocleavage, stimulated by RecA, of the first 84 aa of LexA removes the DNA binding region and is required to activate the SOS response. LexA is a protein that belongs to the LexA family .
Blue light sensor VIVID was derived from the chromosome of Neurospora crassa. The LOV domain of the protein VVD has the capacity to self-dimerize upon light stimulation, Based on this property, the VVD LOV domain was fused with a smaller version of the Gal4 DNA binding domain and the p65 transactivation domain. A common feature of several blue light photoreceptors is the presence of LOV domains, which are able to bind a molecule of flavin mononucleotide (FMN) or flavin adenine dinucleotide (FAD) as chromophore, forming upon light stimulation a cysteinyl flavin C4a adduct.