LasI/LasR Quorum Sensing Mechanism in Pseudomonas aeruginosa #1404174 (License: Personal Use)

This schematic illustrates the canonical LasI/LasR quorum sensing circuit in Pseudomonas aeruginosa: LasI produces the diffusible autoinducer 3OC12-HSL (shown as blue droplets), which accumulates extracellularly and re-enters the cell to bind LasR (black ovals). The LasR-autoinducer complex then activates promoters (green arrows) driving expression of downstream genes-including pTetR, B0034, B0014, and pLas-ultimately resulting in Holin (purple) accumulation and regulated cell lysis or virulence factor release.

Used in microbiology education, research presentations, and biotechnology resources to explain bacterial communication, biofilm regulation, and synthetic biology circuit design; matches user intent for learning molecular mechanisms of quorum sensing or designing genetic circuits.