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 …

The nitrogen fixation promoters of Klebsiella pneumoniae are atypical procaryotic promoters
lacking the usual-10 and-35 elements, requiring instead conserved sequences around-12 …

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 …

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 …

Certain mutations in the nifL gene of the Klebsiella pneumoniae nitrogen fixation (nif) gene
cluster resulted in altered nif regulaiton such that nitrogenase synthesis was no longer …

ntr (nitrogen regulated) and nif (nitrogen fixation) promoters are structurally similar to each
other but bear no resemblance to canonic Escherichia coli promoters. ntr promoters are …

Starting with plasmid pSA30 which contains an intact nifHDKY operon, we selected mutants
that no longer inhibited nitrogen fixation in Klebsiella pneumoniae. Three categories of …

Three proteins involved in nitrogen regulation In Klebsiella pneumoniae, NTRA, NTRB and
NTRC, have been purified. In a defined in vitro system all three NTR proteins are required …

We have determined the precise point of transcrip tion initiation for five nif (nitrogen fixation)
operons of Klebsiella pneumoniae and sequenced the promoters. Our results show that nifF …

The ntrC and nifA gene products of Klebsiella pneumoniae are transcriptional activators
involved in general nitrogen control and nif‐specific regulation, respectively. Multicopy …