The yjbEFGH locus in Escherichia coli K-12 is an operon encoding proteins involved in exopolysaccharide production.

The yjbEFGH locus in Escherichia coli K-12 is an operon encoding proteins involved in exopolysaccharide production. Research Abstract Details 

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The yjbEFGH locus in Escherichia coli K-12 is an operon encoding proteins involved in exopolysaccharide production. Abstract Text:

Lionel ,Shazia N Aslam,Richard M Cooper,David J Clarke,

The RcsCDB phosphorelay was originally identified as the main regulator of colanic acid biosynthesis in Escherichia coli K-12. However, recent transcriptomic analyses have identified more than 150 genes belonging to the Rcs regulon, including yjbE, yjbF, yjbG and yjbH. These genes are clustered on the genome and oriented in the same direction but their function remains unknown. In this work it is shown that yjbE, yjbF, yjbG and yjbH are transcribed as a single operon and it is confirmed that the expression of this operon is controlled by the Rcs phosphorelay, in a manner that is dependent on the auxiliary regulatory protein RcsA. Interestingly, Northern blot analysis revealed that the amount of yjbE transcripts in the cell is higher than the amount of yjbEFGH transcripts and it is proposed that this differential expression is mediated by the presence of a strong stem-loop structure in the yjbE-yjbF intergenic region. Finally, evidence is provided that the overexpression of yjbEFGH affects colony morphology and leads to the production of an extracellular polysaccharide that binds Congo red and toluidine blue-O.

The yjbEFGH locus in Escherichia coli K-12 is an operon encoding proteins involved in exopolysaccharide production. Publishing Authors By Initials

L ,SN Aslam,RM Cooper,DJ Clarke,

For similar genetic processes: gene expression: transcription, genetic research abstracts see: genetic processes: gene expression: transcription, genetic research

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The yjbEFGH locus in Escherichia coli K-12 is an operon encoding proteins involved in exopolysaccharide production. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Microbiology (Reading, England)

VOLUME: 153

Page Numbers: 1070-80

Journal Abbreviation: Microbiology (Reading, Engl.)

ISSN: 1350-0872

DAY: 28

MONTH: Apr

YEAR: 2007

The yjbEFGH locus in Escherichia coli K-12 is an operon encoding proteins involved in exopolysaccharide production. Information

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LANGUAGE: eng

NlmUniqueID: 9430468

The yjbEFGH locus in Escherichia coli K-12 is an operon encoding proteins involved in exopolysaccharide production. Keywords Mesh Terms:

KEYWORDS: Transcription, Genetic

MESH TERMS: metabolism

Chemical & Substance for Abstract: The yjbEFGH locus in Escherichia coli K-12 is an operon encoding proteins involved in exopolysaccharide production. Information

Substance Name: Tolonium Chloride

Registry Number: 92-31-9

Grant and Affiliation Information for The yjbEFGH locus in Escherichia coli K-12 is an operon encoding proteins involved in exopolysaccharide production.

AFFILIATION: Department of Biology and Biochemistry, University of Bath, Bath, UK.

Country: England

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MEDLINETA: Microbiology

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