A Vibrio fischeri mutant that produces light even at low cell densityhas been identified.In which gene is the mutation most likely to have occurred?

Question

Quizplus · Accepted Answer

LuxR is a master transcriptional regulator that activates luminescence genes in response to quorum sensing signals. A mutation in LuxR could result in the production of light even at low cell density because the regulatory control of the lux operon would be lost, leading to constitutive expression of the luminescence genes. Mutations in luxA, luxB, or luxD would affect the structural genes involved in the production and assembly of the luciferase enzyme complex and would not necessarily impact regulatory control of the operon. Therefore, choices A, B, and D are not the best choices.

A Vibrio Fischeri Mutant That Produces Light Even at Low