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Sigma Factor

Known as: Subunit, Sigma, Sigma Subunit, Initiation Factor, Sigma 
A protein which is a subunit of RNA polymerase. It effects initiation of specific RNA chains from DNA.
National Institutes of Health

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Narrower (32)

AdpA-dependent sigma factor, Streptomyces griseusAlgU protein, Pseudomonas aeruginosaBldN protein, Streptomyces coelicolorCrtS protein, Streptomyces setonii
In BloodProcess of secretionagonistsantagonists & inhibitors

Papers overview

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Highly Cited
2001
Highly Cited
2001
Catalytic Function of an α/β Hydrolase Is Required for Energy Stress Activation of the ςB Transcription Factor inBacillus subtilis
ABSTRACT The general stress response of Bacillus subtilis is controlled by the ςB transcription factor, which is activated in… 
Highly Cited
1996
Highly Cited
1996
Molecular characterization of a positively photoregulated nuclear gene for a chloroplast RNA polymerase sigma factor in Cyanidium caldarium.
We have cloned the gene for a putative chloroplast RNA polymerase sigma factor from the unicellular rhodophyte Cyanidium… 
Highly Cited
1996
Highly Cited
1996
Nuclear Encoding of a Chloroplast RNA Polymerase Sigma Subunit in a Red Alga
A chloroplast RNA polymerase sigma factor is encoded by a nuclear gene, sigA, in the red alga Cyanidium caldarium RK-1. The… 
Highly Cited
1990
Highly Cited
1990
Analysis of structure-function relationships of yeast TATA box binding factor TFIID
Highly Cited
1989
Highly Cited
1989
Characterization of the Escherichia coli transcription factor sigma 70: localization of a region involved in the interaction with core RNA polymerase.
A set of internal deletions and frame-shift mutations was made in the structural gene for the major sigma factor of Escherichia… 
Highly Cited
1988
Highly Cited
1988
Structure and function of the sigma-70 subunit of Escherichia coli RNA polymerase. Monoclonal antibodies: localization of epitopes by peptide mapping and effects on transcription.
Murine monoclonal antibodies reactive with the major sigma subunit (sigma-70) of Escherichia coli RNA polymerase were obtained by… 
Highly Cited
1988
Highly Cited
1988
Multiple principal sigma factor homologs in eubacteria: identification of the "rpoD box".
Genes for the principal sigma factor (rpoD genes) of various eubacteria were identified with a synthetic oligonucleotide probe… 
Highly Cited
1987
Highly Cited
1987
Studies on the functional topography of Escherichia coli RNA polymerase. Highly selective affinity labelling by analogues of initiating substrates.
RNA polymerase was treated in the presence of promoter-containing templates with 16 affinity reagents, derivatives on NMPs, NDPs… 
Highly Cited
1972
Highly Cited
1972
Studies of the binding of Escherichia coli RNA polymerase to DNA. IV. The effect of rifampicin on binding and on RNA chain initiation.
Highly Cited
1969
Highly Cited
1969
Bacteriophage Sigma Factor for RNA Polymerase
An RNA polymerase factor analogous to the E. coli σ factor has been isolated from T4-infected cells. The σ factor and the T4… 
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