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Gene Regul Syst Bio. 2009 Apr 22;3:65-87.

Sigma factors for cyanobacterial transcription.

Author information

1
Laboratory of Molecular Genetics, School of Agriculture, Ibaraki University, 3-21-1 Ami, Inashiki, Ibaraki 300-0393, Japan.

Abstract

Cyanobacteria are photosynthesizing microorganisms that can be used as a model for analyzing gene expression. The expression of genes involves transcription and translation. Transcription is performed by the RNA polymerase (RNAP) holoenzyme, comprising a core enzyme and a sigma (sigma) factor which confers promoter selectivity. The unique structure, expression, and function of cyanobacterial sigma factors (and RNAP core subunits) are summarized here based on studies, reported previously. The types of promoter recognized by the sigma factors are also discussed with regard to transcriptional regulation.

KEYWORDS:

cyanobacteria; gene expression; promoter; transcription; σ factor

PMID:
19838335
PMCID:
PMC2758279

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