sigma factor


Also found in: Medical, Encyclopedia, Wikipedia.
Related to sigma factor: RNA polymerase, TATA box

sigma factor

n.
A protein component of bacterial RNA polymerase that recognizes the correct site on DNA for initiating transcription of a gene and that is usually released soon after transcription begins.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Translations
facteur sigma
Mentioned in ?
References in periodicals archive ?
Similarly, the transcription of cpe, other sporulation-specific sigma factor genes sigE and sigK, and the alternative sigma factor genes sigF and sigG [15,16] also was enhanced in comparison with cultures without these chemicals.
After modelling the DFNs, the software allows us to analyse the network connectivity and some related parameters such as secondary porosity (%), permeability (D), sigma factor, block size ([m.sup.3]), P32 ([m.sup.2]/[m.sup.3]), and anisotropy (%).
NrrA regulates glycogen catabolism by controlling the transcription of genes encoding the glycogen catabolism-related enzymes, glycolytic enzymes, and a group 2 sigma factor SigE [15].
154) Often each promoter of the same gene or operon is recognized by a different sigma factor, and thus it is difficult to have a chance of detecting all potential promoters under a single culture condition.
Upon reaching nonculturability, less than 0.1 CFU per ml for four days, the cells maintained their intact membrane and continued to express genes, including stress sigma factor, periplasmic catalase, hemolysin and cold shock protein.
[18] Xu KD, Franklin MJ, Park CH, McFeters GA, Stewart PS Gene expression and protein levels of the stationary phase sigma factor, RpoS, in continuously-fed Pseudomonas aeruginosa biofilms.
PCRs to amplify DNA encoding the putative sigma factor, pilN gene, and shufflon recombinase were developed into a multiplex PCR.
One of these networks contains genes that make mycobacterial transcription factor (MprA) and another protein called sigma factor E (SigE).
Characterization of a locus determining the mucoid status of Pseudomonas aeruginosa: AlgU shows sequence similarities with a Bacillus sigma factor. J Bacterial 1993;175:1153-64.