The O-polysaccharide of Pragia fontium 97U116 was obtained by mild acid degradation of the lipopolysaccharide and studied by sugar analysis along with 1D and 2D (1)H and (13)C NMR spectroscopy. The following structure of the pentasaccharide-repeating unit was established: -->2)-alpha-d-Galf-(1-->3)-alpha-l-Rhap2Ac(I)-(1-->4)-alpha-d-GlcpNAc(I)-(1-->2)-alpha-l-Rhap(II)-(1-->3)-beta-d-GlcpNAc(II)-(1-->
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Characterization of tailocins of Pragia fontium 24613 and the tailocin loci within the family Budviciaceae.
Res Microbiol
November 2024
Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic. Electronic address:
Article Synopsis
- Tailocins are tiny protein complexes that act like phage tails and can inhibit closely related bacterial species, with R-type being common in Gammaproteobacteria and F-type being rare.
- This study focused on a freshwater isolate, Pragia fontium 24613, which produces both R- and F-type tailocins, analyzing their ability to inhibit clinically relevant bacteria and identifying the related gene cluster.
- The results showed that disrupting a specific protein affected R-tailocin production, and a comparison of genes revealed R-type tailocins are widely conserved among certain bacteria, while F-type tailocins show less conservation and presence, highlighting their antimicrobial potential against important pathogens.
R-Type Fonticins Produced by Pragia fontium Form Large Pores with High Conductance.
J Bacteriol
January 2023
Department of Genetics and Microbiology, Faculty of Science, Charles University, Prague, Czech Republic.
Fonticins are phage tail-like bacteriocins produced by the Gram-negative bacterium Pragia fontium from the family . This bacterium produces contractile-type particles that adsorb on the surface of sensitive bacteria and penetrate the cell wall, probably during contraction, in a way similar to the type VI secretion system. We characterized the pore-forming activity of fonticins using both living cells and model membranes.
View Article and Find Full Text PDF, a new genus of : identification of sp. nov. and sp. nov. isolated from cloacal content of snow finch ().
Int J Syst Evol Microbiol
February 2021
Shanghai Public Health Clinical Center, Fudan University, Shanghai 201508, PR China.
Four novel strains isolated from the cloacal contents of snow finches () were characterized as aerobic, Gram-stain-negative, slightly motile, and rod-shaped. Analysis of the 16S rRNA gene sequence revealed that strain CF-458 had the highest similarities of 96.9 and 96.
View Article and Find Full Text PDFFree-Living Enterobacterium 24613: Complete Genome Sequence and Metabolic Profiling.
Evol Bioinform Online
March 2017
Department of Biology, Masaryk University, Brno, Czech Republic.
is one of the few species that belongs to the group of atypical hydrogen sulfide-producing enterobacteria. Unlike other members of this closely related group, is not associated with any known host and has been reported as a free-living bacterium. Whole genome sequencing and metabolic fingerprinting confirmed the phylogenetic position of inside the group of atypical HS producers.
View Article and Find Full Text PDFArticle Synopsis
- * E. coli 126 LPS demonstrated higher toxicity compared to other E. coli strains and related bacteria, while being less pyrogenic than pyrogenal, with a bimodal distribution seen in SDS-PAGE.
- * Immunological tests revealed that E. coli 126 LPS had unique antigenic properties, and its O-specific polysaccharide structure matched that of E. coli serogroup O15, indicating distinct characteristics that differentiate it from other E. coli strains.
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