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

Papers overview

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Highly Cited
2005
Highly Cited
2005
The sigmaS (or RpoS) subunit of RNA polymerase is the master regulator of the general stress response in Escherichia coli. While… (More)
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Highly Cited
2002
Highly Cited
2002
Sigma-H is an alternative RNA polymerase sigma factor that directs the transcription of many genes that function at the… (More)
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Highly Cited
2002
Highly Cited
2002
Like other bacterial species, Mycobacterium tuberculosis has multiple sigma (sigma) factors encoded in its genome. In previously… (More)
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Review
2001
Review
2001
Envelope stress responses play important physiological roles in a variety of processes, including protein folding, cell wall… (More)
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Highly Cited
1999
Highly Cited
1999
The ability of Mycobacterium tuberculosis to adapt to different environments in the infected host is essential for its… (More)
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Highly Cited
1999
Highly Cited
1999
SigR (sigma(R)) is a sigma factor responsible for inducing the thioredoxin system in response to oxidative stress in the… (More)
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Review
1998
Review
1998
A mechanism for regulating gene expression at the level of transcription utilizes an antagonist of the sigma transcription factor… (More)
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Highly Cited
1998
Highly Cited
1998
A mutation in the Escherichia coli gene encoding the stationary phase-inducible sigma factor (sigmaS, RpoS) not only abolishes… (More)
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Review
1993
Review
1993
Bacteria synthesize a number of different sigma factors which allow the co-ordinate expression of groups of genes owing to the… (More)
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Highly Cited
1993
Highly Cited
1993
Strains of Escherichia coli which lack detectable guanosine 3',5'-bispyrophosphate (ppGpp) display a pleiotropic phenotype that… (More)
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