Difference between revisions of "Part:BBa K1916102"

Revision as of 07:12, 25 October 2016

Ara-Inducible Cyan7427_1390g3 Expression System

A GAF domain of the cyanobacteriochrome (CBCR) Cyan7427_1390 with an intein/chitin-binding domain fused to the C-terminus for purification. Expression regulated by a pBAD promoter. As with most CBCRs, Cyan7427 requires a phycocyanobilin co-factor, and must therefore be expressed in a system with heme oxygenase (BBa_I15008) and PcyA (BBa_I15009). Cyan7427_1390g3 expresses well in E. coli and cells appear vibrant blue-green under normal light.

Characterization

The ara-inducible system was cloned into pSB1C3 and co-transformed into DH5-alpha cells along with a plasmid containing heme oxygenase and PcyA. After growing the cells to OD=0.9-1 in Terrific Broth, the cultures were induced with increasing levels of arabinose to study the vibrancy of the cells once harvested (Fig.1).

Fig.1 Pellets of cells expressing Cyan7427, spun down 4 hrs after being induced by different concentrations of arabinose.

Sequence and Features