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Gene Review

virG  -  two-component response regulator VirG

Agrobacterium fabrum str. C58

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Disease relevance of virG


High impact information on virG


Biological context of virG


Associations of virG with chemical compounds

  • Efficient vir gene induction in octopine and nopaline strains requires virA, virG, and vir boxes from the respective Ti plasmids [3].
  • We also fused the lac promoter to a virG::lacZ translational fusion and found that IPTG elevated expression of this translational fusion to moderate levels, though not to levels as high as from the stronger of the two native virG promoters [2].
  • Since the trp promoter is not under virA-virG control, this result indicates that modification of VirG is necessary for its full activity [9].

Other interactions of virG


  1. virA and virG are the Ti-plasmid functions required for chemotaxis of Agrobacterium tumefaciens towards acetosyringone. Shaw, C.H., Ashby, A.M., Brown, A., Royal, C., Loake, G.J., Shaw, C.H. Mol. Microbiol. (1988) [Pubmed]
  2. Controlled expression of the transcriptional activator gene virG in Agrobacterium tumefaciens by using the Escherichia coli lac promoter. Chen, C.Y., Winans, S.C. J. Bacteriol. (1991) [Pubmed]
  3. Efficient vir gene induction in Agrobacterium tumefaciens requires virA, virG, and vir box from the same Ti plasmid. Krishnamohan, A., Balaji, V., Veluthambi, K. J. Bacteriol. (2001) [Pubmed]
  4. Resection and mutagenesis of the acid pH-inducible P2 promoter of the Agrobacterium tumefaciens virG gene. Chang, C.H., Winans, S.C. J. Bacteriol. (1996) [Pubmed]
  5. Mutational analysis of the transcriptional activator VirG of Agrobacterium tumefaciens. Scheeren-Groot, E.P., Rodenburg, K.W., den Dulk-Ras, A., Turk, S.C., Hooykaas, P.J. J. Bacteriol. (1994) [Pubmed]
  6. Glycine betaine allows enhanced induction of the Agrobacterium tumefaciens vir genes by acetosyringone at low pH. Vernade, D., Herrera-Estrella, A., Wang, K., Van Montagu, M. J. Bacteriol. (1988) [Pubmed]
  7. Mutants of Agrobacterium tumefaciens virG gene that activate transcription of vir promoter in Escherichia coli. Jung, Y.C., Gu, Y., Wu, D., Jin, S. Curr. Microbiol. (2004) [Pubmed]
  8. Molecular characterization of the virulence gene virG of pTiKU 12. Lee, S.H., Sim, W.S. Mol. Cells (1998) [Pubmed]
  9. virG, an Agrobacterium tumefaciens transcriptional activator, initiates translation at a UUG codon and is a sequence-specific DNA-binding protein. Pazour, G.J., Das, A. J. Bacteriol. (1990) [Pubmed]
  10. The VirA protein of Agrobacterium tumefaciens is autophosphorylated and is essential for vir gene regulation. Jin, S., Roitsch, T., Ankenbauer, R.G., Gordon, M.P., Nester, E.W. J. Bacteriol. (1990) [Pubmed]
  11. Altered-function mutations of the transcriptional regulatory gene virG of Agrobacterium tumefaciens. Han, D.C., Chen, C.Y., Chen, Y.F., Winans, S.C. J. Bacteriol. (1992) [Pubmed]
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