Plant Molecular Biology

, Volume 25, Issue 5, pp 899–907 | Cite as

Localization of the VirA domain involved in acetosyringone-mediatedvir gene induction inAgrobacterium tumefaciens

  • Stefan C. H. J. Turk
  • Richard P. van Lange
  • Tonny J. G. Regensburg-Tuïnk
  • Paul J. J. Hooykaas
Research Articles


The VirA protein ofAgrobacterium tumefaciens is thought to be a receptor for plant phenolic compounds such as acetosyringone. Although it is not known whether the interaction between VirA and the phenolics is direct or requires other phenolic-binding proteins, it is shown in this study that the first 280 amino acids of the VirA protein are not essential for the acetosyringone mediatedvir gene induction response. Considering the fact that the cytoplasmic region between the amino acids 283 and 304 is highly conserved between the different VirA proteins, and that deletion of this region abolishes VirA activity, we suggest that the acetosyringone receptor domain is located in this cytoplasmic domain of the VirA protein.

Key words

Agrobacterium gene regulation sensor protein signal transduction VirA protein acetosyringone 


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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Stefan C. H. J. Turk
    • 1
  • Richard P. van Lange
    • 1
  • Tonny J. G. Regensburg-Tuïnk
    • 1
  • Paul J. J. Hooykaas
    • 1
  1. 1.Institute of Molecular Plant Sciences, Clusius LaboratoryLeiden UniversityLeidenNetherlands

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