sigma factor


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Related to sigma factor: RNA polymerase, TATA box

sigma factor

[′sig·mə ‚fak·tər]
(cell and molecular biology)
A regulatory protein in prokaryotes that combines with the ribonucleic acid (RNA) polymerase enzyme to facilitate the initiation of RNA synthesis.
References in periodicals archive ?
30] DeVries CA, Ohman DE Mucoid-to-nonmucoid conversion in alginate-producing Pseudomonas aeruginosa often results from spontaneous mutations in algT, encoding a putative alternate sigma factor, and shows evidence for autoregulation.
CTX-M-14], nikB, putative sigma factor, rci, pilN, and pCT008-009) and when compared with pCT had identical flanking regions adjacent to [bla.
FliA is part of class II and is the sigma factor of the flagellar system.
The Primary Sigma Factor of Staphylococcus aureus: from Target Identification to Isolation of Inhibitors of the RNA Polymerase Holoenzyme.