Expression of the mexA gene requires the DNA helicase RecG in Pseudomonas aeruginosa PAO1

Aram Heo, Woojun Park

Research output: Contribution to journalArticle


This study provides evidence that RecG regulates the expression of the OxyR-independent gene mexA in Pseudomonas aeruginosa PAO1. A reduction in mexA expression was observed in the absence of RecG, but not OxyR, by northern blot and quantitative real-time PCR analyses. The canonical palindromic RecG binding sequence was present upstream of the mexA promoter, and bound purified RecG and single strand-binding protein. These data reveal a novel mechanism of OxyR-independent gene transcription by RecG.

Original languageEnglish
Pages (from-to)492-495
Number of pages4
JournalJournal of Microbiology and Biotechnology
Issue number4
Publication statusPublished - 2015



  • DNA helicase RecG
  • Efflux pump
  • mexA
  • OxyR
  • Pseudomonas aerruginosa
  • Transcriptional regulator

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology

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