Domains involving nonrandom distribution of lipopolysaccharide in the outer membrane of Escherichia coli.

Immunogenicity of enterotoxigenic Escherichia coli outer membrane vesicles encapsulated in chitosan nanoparticles

Objective(s): Enterotoxigenic Escherichia coli (ETEC) is an important cause of diarrheal disease in humans, particularly in children under 5 years and travelers in developing countries. To our knowledge, no vaccine is licensed yet to protect against ETEC infection. Like many Gram-negative pathogens, ETEC can secrete outer membrane vesicles (OMVs). These structures contain various immunogenic vi...

SDS-PAGE Analysis of the Outer Membrane Proteins of Uropathogenic Escherichia coli Isolated from Patients in Different Wards of Nemazee Hospital, Shiraz, Iran

Background: Outer membrane proteins (OMPs) constitute the main structure and about half of the cell wall of Gram-negative bacteria. The OMPs of Escherichia coli (E. coli) play an important role in its drug resistance. Previous studies have shown that the OMPs of E. coli enhance its pathogenic effects by helping the bacterium to evade the immune defense and promote its adsorption to host cells. ...

A Chimeric Vaccine Consisting of Highly Immunogenic Regions form Escherichia coli Iron Regulated Outer-Membrane Proteins: An In Silico Approach

Differential effects of yfgL mutation on Escherichia coli outer membrane proteins and lipopolysaccharide.

YfgL together with NlpB, YfiO, and YaeT form a protein complex to facilitate the insertion of proteins into the outer membrane of Escherichia coli. Without YfgL, the levels of OmpA, OmpF, and LamB are significantly reduced, while OmpC levels are slightly reduced. In contrast, the level of TolC significantly increases in a yfgL mutant. When cells are depleted of YaeT or YfiO, levels of all outer...

Cytochemical localization of lipopolysaccharides during peptidoglycan degradation of Escherichia coli cells.

The cytochemical reaction of Thiery [J. P. Thiery, J. Microsc. (Paris) 6:987-1018, 1976] was applied to several Escherichia coli strains having different lipopolysaccharide molecular structures. The granular deposit obtained strongly suggested that part of the R core exposed on the outer membrane was responsible for the staining. As this procedure specifically stains the outer membrane, it was ...