The nifJ and nifH promoters of Klebsiella pneumoniae are divergently transcribed σ; 54‐
dependent promoters that are positively activated by the NifA protein. NifA binds to upstream …

The Klebsiella pneumoniae nifU promoter is positively controlled by the NifA protein and
requires a form of RNA polymerase holoenzyme containing the rpoN encoded sigma factor …

The interaction of the Klebsiella pneumoniae NifA protein, a σ 54-dependent activator, with
the nifE and nifU promoters was analysed. At these promoters NifA established contacts in …

The influence of the Klebsiella pneumoniae nifL gene product upon the interaction of the
transcriptional activator protein NifA with the nifH promoter has been examined using in vivo …

The role of conserved nucleotides in nitrogen-fixation promoter function has been examined
using both oligonucleotide and chemical mutagenesis to introduce base changes in the …

Upstream sequences of the Klebsiella pneumoniae nifH promoter were mutagenised and
activation of the mutated promoters by the nif-specific transcriptional activator protein NifA …

The regulatory region spanning the divergently transcribed nif F and nifLA promoters
contains a NIFA‐specific upstream activator sequence (UAS) located around+ 59, and two …

The upstream activator sequence (UAS) found in Klebsiella pneumoniae nif promoters and
required for the activation of transcription by nifA, is absent from the nifF-nifL intergenic …

A 1.4‐kb PstI–HpaI DNA fragment carrying the Klebsiella pneumoniae nifM gene has been
sequenced; nifM has been shown to encode a 30.6‐kDa polypeptide. Two other open …

The positive control protein NifA of Klebsiella pneumoniae activates transcription by RNA
polymerase containing σ 54 by catalysing open promoter complex formation. We show that …