The luxA, B, C, D, and E genes from Photorhabdus luminescens were cloned and functionally expressed in Saccharomyces cerevisiae to construct a bacterial lux-based yeast bioreporter capable of autonomous bioluminescence emission. The bioreporter was engineered using a series of pBEVY yeast expression vectors that allowed for bi-directional constitutive or inducible expression of the individual luxA, B, C, and E genes. The luxD gene, encoding the acyl-ACP transferase that ultimately supplies the requisite aldehyde substrate for the bioluminescent reaction, was fused to a yeast internal ribosomal entry site (IRES) sequence to ensure high bi-cistronic expression. Although self-generation of bioluminescence was achieved by the bioreporter, the signal was relatively weak and decayed rapidly. To overcome this instability, a flavin oxidoreductase gene (frp) from Vibrio harveyi was co-expressed to provide sufficient concentrations of the FMNH2 co-factor required for the bioluminescent reaction. Expression of frp with the lux genes not only stabilized but also enhanced bioluminescence to levels approaching 9.0U105 times above background.
GUPTA, R., PATTERSON, S., RIPP, S., SIMPSON, M., & SAYLER, G. (2003). Expression of the genes (, , , , and ) in. FEMS Yeast Research, 4(3), 305–313. https://doi.org/10.1016/s1567-1356(03)00174-0