Difference between revisions of "Part:BBa K3739030"

Revision as of 21:01, 21 October 2021

blrA-GFP

blrA can be activated by blue light and produce reactive oxygen species(ROS).

Biology

Flavin-combined fluorescent protein, coded by a kind of optogenetic toolbox LOV(light-oxygen voltage)-based photosensitizer gene, can induce the light-driven killing of bacteria. BlrA, originating from Bacillus subtilis, is a blue light-induced GTP-binding receptor, which possesses the LOV domain and autofluorescence. LOV domain enables it to be activated by blue light and produce ROS, which can damage the bacterial structure.

Gfp codes for a green fluorescence protein.The fluorescence density of GFP can reflect the expression level of BlrA.

Usage

To intuitionally show whether blrA expresses or not, it is linked to a GFP through a 3GS linker. The growth condition and the level of BlrA can be reflected by the intensity of green fluorescence.

Fig.1. The result of colony PCR. Plasmid pET28a(+).

We take blrA as the core of our kill switch, combine it with promotor, terminator and a series of necessary elements. The whole part is inserted into a plasmid backbone and finally transformed into E.coli to gain enough correct and functional circuits. The circuits are transformed into Vibrio.natriegens. We choose growth curve and CFU to measure the killing effect of BlrA.

Sequence and Features