Abstracts - faqs.org

Abstracts

Biological sciences

Search abstracts:
Abstracts » Biological sciences

Regulatory systems modulating the transcription of the pectinase gens of Erwinia chrysanthemi are conserved in Escherichia coli

Article Abstract:

Transcriptional fusions found on low-copy-number plasmids of the phytopathogenic enterobacterium Erwinia chrysanthemi were utilized to investigate the regulation of the pel genes in a heterologous host, Escherichia coli. The five pel fusions in E. coli were affected by growth phase, catabolite repression and anaerobic growth conditions and were induced in the presence of galacturonate, a sugar whose metabolism leads to the creation of KDG, the inducer of pel transcription in Er. chrysanthemi. Expression of pelE increased with the osmolarity of the culture medium. However, the regulation of pel expression by temperature or nitrogen starvation, seen in Er. chrysanthemi, was not seen in E. coli.

Author: Hugouvieux-Cotte-Pattat, Nicole, James, Valerie
Publisher: Society for General Microbiology
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1996
Genetic aspects, Metabolism

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Erwinia chrysanthemi at high osmolarity: influence of osmoprotectants on growth and pectate lyase production

Article Abstract:

An increase in the osmolarity of the culture medium decreases the growth and activity of the pectate lysases (PLs) activity of Erwinia chrysanthemi. In the presence of osmoprotectants such as glycine betaine, proline, ectoine and pipecolate the cell is able to grow in cultures containing high amounts of NaCl and the production of PL is unaffected by the increasing NaCl content. The uptake of the osmoprotectants and the activation of PL production because of induced transcription of the pelE gene is because of osmotic pressure but osmoprotectants have no effect on the PL activity in vitro.

Author: Blanco, Carlos, Bonnassie, Sylvie, Gouesbet, Gwenola, Jebbar, Mohammad, Hugouvieux-Cotte-Pattat, Nicole, Himdi-Kabbab, Souad
Publisher: Society for General Microbiology
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1995
Analysis, Fluid-electrolyte balance, Adaptation (Biology), Evolutionary adaptation, Osmoregulation

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Glutamine, glutamate, and alpha-glucosylglycerate are the major osmotic solutes accumulated by Erwinia chrysanthemi strain 3937

Article Abstract:

The Erwinia chrysanthemi 3937 endogenous osmolytes were analyzed and showed that the bacterium does not synthesize glutamine and alpha-glucosylglycerate in enterobacteria. The study showed that it is not true only halophilic organisms and its counterpart glucosylglycerol accumulate that glucosylglycerate by nonhalophilic ones.

Author: Blanco, Carlos, Bernard, Theophile, Goude, Renan, Renaud, Stephanie, Bonnassie, Sylvie
Publisher: American Society for Microbiology
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2004
Science & research, Bacteria, Glutamate, Glutamine, Chemical properties

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Subjects list: Bacteria, Phytopathogenic, Phytopathogenic bacteria, Research
Similar abstracts:
  • Abstracts: Effect of temperature on structure and function of the methanogenic archaeal community in an anoxic rice field soil
  • Abstracts: Characterization of a forest soil metagenome clone that confers indirubin and indigo production on Escherichia coli
  • Abstracts: Zymomonas mobilis squalene-hopene cyclase gene (shc): cloning, DNA sequence analysis, and expression in Escherichia coli
  • Abstracts: Characterization and expression of the hydrogenase-encoding gene from Clostridium acetobutylicum P262. A Clostridium acetobutylicum regulator gene (regA) affecting amylase production in Bacillus subtilis
  • Abstracts: Half-tetrad analysis in zebrafish: mapping the ros mutation and the centromere of Linkage Group I. Genetic control of adult pigment stripe development in zebrafish
This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.
Some parts © 2025 Advameg, Inc.