Regulation of nitrogen fixation in Azospirillum brasilense.

  title={Regulation of nitrogen fixation in Azospirillum brasilense.},
  author={Yan X. Zhang and Robert H. Burris and Paul W. Ludden and Gary P. Roberts},
  journal={FEMS microbiology letters},
  volume={152 2},
The regulation of nitrogen fixation in Azospirillum brasilense is very complicated, and it responds to exogenous fixed nitrogen or a change of oxygen concentration. This regulation occurs at both transcriptional and posttranslational levels. Unlike regulation seen in Klebsiella pneumoniae, transcription of nifA does not require NTRB/NTRC in A. brasilense and the expression of nifHDK is controlled by posttranslational regulation of NIFA activity. Addition of NH4+ or a shift from microaerobic to… CONTINUE READING

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