Signal Transduction Via Vir a and Vir G in Agrobacterium

The virulence genes of Agrobacterium tumefaciens are inducible by certain phenolic compounds. Regulation is mediated by the VirA and VirG gene products, which together form a two component regulatory system. Results indicate that the VirA protein forms a sensor for phenolic compounds and that the VirG protein becomes activated via the VirA protein.