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Gene Review

blcR  -  transcriptional repressor of the blcABC...

Agrobacterium fabrum str. C58

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High impact information on attJ

  • First, we located attJ, which codes for an IclR-type suppressor that regulates the second gene attM [1].
  • Mutation of attJ resulted in constitutive production of AHL-lactonase that abolishes 3OC8HSL accumulation and Ti plasmid transfer [1].
  • In A. tumefaciens A6, the expression of the attKLM operon is controlled by the transcriptional repressor encoded by an adjacent gene, attJ [2].


  1. Genetic control of quorum-sensing signal turnover in Agrobacterium tumefaciens. Zhang, H.B., Wang, L.H., Zhang, L.H. Proc. Natl. Acad. Sci. U.S.A. (2002) [Pubmed]
  2. The assimilation of gamma-butyrolactone in Agrobacterium tumefaciens C58 interferes with the accumulation of the N-acyl-homoserine lactone signal. Carlier, A., Chevrot, R., Dessaux, Y., Faure, D. Mol. Plant Microbe Interact. (2004) [Pubmed]
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