Fig. 3
From: Toward improved terpenoids biosynthesis: strategies to enhance the capabilities of cell factories
A Illustration of dynamic control of LuxI/LuxR Quorum Sensing (QS) system. (i) At low cell density, the transcriptional regulator, LuxR, binds the Plux promoter to repress the transcription of the target gene. (ii) At high cell density, LuxI protein synthesizes acyl-homoserine lactone (AHL) which binds the transcriptional regulator resulting in dissociation from the promoter. The target gene is subsequently expressed. B Graphical representation of putative enzymes joined with a linker. Sequential pathway enzymes can be modified through enzyme fusion to improve enzymatic reaction. The fusion of enzymes ensures substrates are channelled from one active site to the other