Activation of transcription at the Klebsiella pneumoniae nifLA promoter requires the
phosphorylated form of the positive control protein NTRC, together with RNA polymerase …

A model for the domain structure of σ54‐dependent transcriptional activators, based on
sequence data, has been tested by examining the function of truncated and chimaeric …

We have constructed mutations in what we predict to be the DNA-recognition helix of
Klebsiella pneumoniae NtrC, which regulates transcription from promoters under global …

Transcription from the σ 54-dependent Klebsiella pneumoniae nifL and glnAp2 promoters is
activated by the general nitrogen regulatory protein NTRC. Unlike the glnAp2 promoter …

In vitro transcription from the promoter for the nitrogen fixation regulatory operon nifLA of K.
pneumoniae requires four protein fractions: the core form of RNA polymerase; NTRA, an …

Four substitutions at serine residue 160 which increase the activity of the σ54‐dependent
activator protein NTRC in the absence of NTRB have been analysed in detail. Mutagenesis …

The nif promoters of Klebsiella pneumoniae must be activated by proteins bound to
upstream sequences which are thought to interact with the ς54-RNA polymerase …

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 …

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

Transcriptional activation of nitrogen fixation genes by Nrt A in Klebsiella pneumoniae
requires an upstream Nif A binding site. We now report that the introduction of haif turns of …