Recent research has revealed that HU binds with high specificity to the mRNA of rpoS, a transcript for the stress sigma factor of RNA polymerase, and stimulates translation of the protein.
22.
The RpoS gene in " E . coli " encodes sigma 38, a sigma factor which regulates stress response and acts as a transcriptional regulator for many genes involved in cell adaptation.
23.
In prokaryotes, transcription is carried out by a single type of RNA polymerase, which needs a DNA sequence called a Pribnow box as well as a sigma factor ( ? factor ) to start transcription.
24.
At least three known genes including " xthA " and " katE " are regulated by a sigma factor, KatF ( RpoS ), whose synthesis is turned on during the stationary phase.
25.
Many Gram-positive species have two copies of 6S RNA . In " Bacillus subtilis ", both copies appear to interact with RNA polymerase holoenzyme containing the housekeeping sigma factor and be expressed during different stages of growth.
26.
Its transcription is induced during nitrogen limitation by the NtrB / C two-component system ( an important regulator of nitrogen assimilation and swarming motility ) together with the alternative sigma factor RpoN ( a global regulator involved in nitrogen metabolism ).
27.
The indirectly activation promoters include these dependent on sigma factors : S, H, N, E . When strong promoters, such as " rrn ", are inhibited, there more RNAP are available for these alternative sigma factors.
28.
The indirectly activation promoters include these dependent on sigma factors : S, H, N, E . When strong promoters, such as " rrn ", are inhibited, there more RNAP are available for these alternative sigma factors.
29.
Sigma factors act as mediators of sequence-specific transcription, such that a single sigma factor can be used for transcription of all housekeeping genes or a suite of genes the cell wishes to express in response to some external stimuli such as stress.
30.
Sigma factors act as mediators of sequence-specific transcription, such that a single sigma factor can be used for transcription of all housekeeping genes or a suite of genes the cell wishes to express in response to some external stimuli such as stress.
