J Bacteriol. 1996 Jan;178(2):550-3.

Multiple sigma factor genes in Brevibacterium lactofermentum: characterization of sigA and sigB.

Oguiza JA, Marcos AT, Malumbres M, Martín JF.

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Area of Microbiology, Faculty of Biology, University of León, Spain.

Abstract

Four rpoD hybridizing signals have been identified in the chromosome of Brevibacterium lactofermentum. Two rpoD-like genes, sigA and sigB, have been cloned and sequenced, and they encode principal sigma factors of the RNA polymerase. The deduced amino acid sequences of SigA and SigB showed very high similarities to those of Mycobacterium smegmatis MysA and MysB proteins, respectively, and also to those of HrdB proteins from different Streptomyces species. SigA and SigB maintain the conserved motifs of sigma 70-like principal sigma factors. sigB is closely linked to the dtxR gene (encoding a repressor of iron-regulated promoters homologous to the diphtheria toxin repressor from Corynebacterium diphtheriae.

PMID:: 8550480; [PubMed - indexed for MEDLINE]
PMCID:: PMC177692

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Cited by 6 PubMed Central articles

The extracytoplasmic function-type sigma factor SigM of Corynebacterium glutamicum ATCC 13032 is involved in transcription of disulfide stress-related genes. [J Bacteriol. 2007]
The extracytoplasmic function-type sigma factor SigM of Corynebacterium glutamicum ATCC 13032 is involved in transcription of disulfide stress-related genes.
Nakunst D, Larisch C, Hüser AT, Tauch A, Pühler A, Kalinowski J. J Bacteriol. 2007 Jul; 189(13):4696-707. Epub 2007 May 4.
The alternative sigma factor SigB of Corynebacterium glutamicum modulates global gene expression during transition from exponential growth to stationary phase. [BMC Genomics. 2007]
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Larisch C, Nakunst D, Hüser AT, Tauch A, Kalinowski J. BMC Genomics. 2007 Jan 4; 8:4. Epub 2007 Jan 4.
Transcription of the contiguous sigB, dtxR, and galE genes in Corynebacterium diphtheriae: evidence for multiple transcripts and regulation by environmental factors. [J Bacteriol. 2006]
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