Based on genomic data and on the phenotypes of an FlhF mutant of Pseudomonas putida,
the alternative sigma factor σN (σ54) has been proposed to play a key role in survival to …

The bacterial σ54 protein associates with core RNA polymerase to form a holoenzyme that
functions in enhancer‐dependent transcription. Isomerization of the σ54 polymerase and its …

The recombinant plasmid pASK18 carries a Streptomyces DNA fragment which includes an
open reading frame, designated psfS (putative sigma factor, Streptomyces), as its putative …

Alternative sigma factor proteins enable transcription of specific sets of genes in bacterial
cells. Their activities can be controlled by posttranslational mechanisms including inhibition …

The P2 promoter of proP, encoding a transporter for proline and glycine betaine in
Escherichia coli, is a unique paradigm, where master regulators of different growth stages …

Pseudomonas-derived regulators DmpR and XylR are structurally and mechanistically
related σ54-dependent activators that control transcription of genes involved in catabolism of …

Transcription from the Pseudomonas‐derived σ54‐dependent Po promoter of the dmp
operon is mediated by the aromatic‐responsive regulator DmpR. However, physiological …

Among various group I sigma factors, two amino acids, Val55 and Ala59 are the conserved
amino acids in the 1.1 hydrophobic subdomain. These two sites have been mutated to …

Bacteria that survive under variable conditions possess an assortment of genetic regulators
to meet these challenges. The group IV or extracytoplasmic function (ECF) sigma factors …

Glucose and other C sources exert an atypical form of catabolic repression on the σ54-
dependent promoter Pu, which drives transcription of an operon for m-xylene degradation …