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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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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
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
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
1990
Highly Cited
1990
Two amino acids in an RNA polymerase sigma factor involved in the recognition of adjacent base pairs in the -10 region of a cognate promoter.
The recognition of promoter region -10 nucleotide sequences in prokaryotes is believed to be mediated by a segment of alpha-helix… 
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
1987
Highly Cited
1987
Purification and characterization of RNA polymerase from the cyanobacterium Anabaena 7120.
Highly Cited
1975
Highly Cited
1975
RNA polymerase from phage SP01-infected and uninfected Bacillus subtilis.
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
1970
Highly Cited
1970
Positive Control of Transcription by a Bacteriophage Sigma Factor
A sigma specificity factor induced by infection with bacteriophage T4 directs the in vitro synthesis of RNA species corresponding… 
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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