Interaction of NahR, a LysR-type transcriptional regulator, with the α subunit of RNA polymerase in the naphthalene degrading bacterium, Pseudomonas putida NCIB 9816-4

Woojun Park, Che O. Jeon, Eugene L. Madsen

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26 Citations (Scopus)


NahR, a LysR-type transcriptional regulator, is required for expression of naphthalene catabolic operons. However, detailed mechanisms of transcriptional activation by NahR are poorly understood. Many transcriptional activators make direct contact with RNA polymerase (RNAP) to initiate transcription. We investigated the hypothesis that direct contact between NahR and the α subunit of RNAP (αRNAP) may be involved in expression of the naphthalene catabolic operons in Pseudomonas putida NCIB 9816-4. Interactions between the NahR and αRNAP in P. putida NCIB 9816-4 were analyzed using the yeast two-hybrid system. The results obtained indicate that protein-protein interactions occur between αRNAP and the NahR. Gene activation by NahR is consistent with the general transcriptional mechanism of class I transcription factors, which function by contacting αRNAP.

Original languageEnglish
Pages (from-to)159-165
Number of pages7
JournalFEMS Microbiology Letters
Issue number2
Publication statusPublished - 2002 Aug 6
Externally publishedYes



  • Protein-protein interaction
  • RNA polymerase α subunit
  • rpoA sequence
  • Transcriptional activation
  • Yeast two-hybrid system

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Applied Microbiology and Biotechnology
  • Microbiology

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