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Biosynthesis of lipopolysaccharide O antigens
Trends in Microbiology, 1995Lipopolysaccharide O antigens are important virulence determinants for many bacteria. O-antigen synthesis is an interesting problem in cell-surface assembly. There are two known assembly pathways, which differ in the cellular location of their polymerization steps and in the direction of chain polymerization.
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In Vitro O-Antigen Ligase Assay
2013WaaL is a membrane enzyme that catalyzes the glycosidic bonding of a sugar at the proximal end of the undecaprenyl-diphosphate (Und-PP)-O-antigen with a terminal sugar of the lipid A-core oligosaccharide (OS). This is a critical step in lipopolysaccharide synthesis.
Ruan, Xiang, Valvano, Miguel A
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2011
The lipopolysaccharide (LPS) is the major constituent of the outer leaflet of the outer membrane of Gram-negative bacteria. Its lipid A moiety is embedded in the membrane and serves as an anchor for the rest of the LPS molecule. The outermost repetitive glycan region of the LPS is linked to the lipid A through a core oligosaccharide (OS), and is ...
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The lipopolysaccharide (LPS) is the major constituent of the outer leaflet of the outer membrane of Gram-negative bacteria. Its lipid A moiety is embedded in the membrane and serves as an anchor for the rest of the LPS molecule. The outermost repetitive glycan region of the LPS is linked to the lipid A through a core oligosaccharide (OS), and is ...
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Carbohydrate Research, 2010
O-Polysaccharides (O-antigens) were isolated from Escherichia coli O13, O129, and O135 and studied by chemical analyses along with 2D (1)H and (13)C NMR spectroscopy. They were found to possess a common -->2)-l-Rha-(alpha1-->2)-l-Rha-(alpha1-->3)-l-Rha-(alpha1-->3)-d-GlcNAc-(beta1--> backbone, which is a characteristic structural motif of the O ...
Andrei V, Perepelov +7 more
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O-Polysaccharides (O-antigens) were isolated from Escherichia coli O13, O129, and O135 and studied by chemical analyses along with 2D (1)H and (13)C NMR spectroscopy. They were found to possess a common -->2)-l-Rha-(alpha1-->2)-l-Rha-(alpha1-->3)-l-Rha-(alpha1-->3)-d-GlcNAc-(beta1--> backbone, which is a characteristic structural motif of the O ...
Andrei V, Perepelov +7 more
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Carbohydrate Research, 2003
The O-antigen is an important component of the outer membrane of Gram-negative bacteria. It is a repeat unit polysaccharide and consists of a number of repeats of an oligosaccharide, the O-unit, which generally has between two and six sugar residues.
Gabrielle, Samuel, Peter, Reeves
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The O-antigen is an important component of the outer membrane of Gram-negative bacteria. It is a repeat unit polysaccharide and consists of a number of repeats of an oligosaccharide, the O-unit, which generally has between two and six sugar residues.
Gabrielle, Samuel, Peter, Reeves
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Detection of O antigens inEscherichia coli
Animal Health Research Reviews, 2011AbstractLipopolysaccharide on the surface ofEscherichia coliconstitutes the O antigens which are important virulence factors that are targets of both the innate and adaptive immune systems and play a major role in host–pathogen interactions. O antigens are responsible for antigenic specificity of the strain and determine the O serogroup.
Chitrita, DebRoy +2 more
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O antigen-dependent mutant of bacteriophage T5
Journal of Virology, 1984A T5 mutant is described which showed normal infection of Escherichia coli F but virtually no infection of cells lacking the E. coli F O antigen. This was due to very poor adsorption to the O antigen-deficient cells. Inactivation kinetics with anti-T5 serum and adsorption and desorption kinetics to receptor-deficient E.
K J, Heller, D, Bryniok
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Microbial O-antigenic hexosaminoglycans
Pure and Applied Chemistry, 1983Abstract
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O‐Antigenic Cross‐Reactivity In Fusobacterium Nucleatum
Acta Pathologica Microbiologica Scandinavica Section B Microbiology, 1979Lipopolysaccharides (LPS) of the same chemotype isolated from seven strains of Fusobacterium nucleatum were examined by indirect haemagglutination and inhibition of haemagglutination in unabsorbed and absorbed antisera. Four common major antigenic specificities were detected, and two of the LPS examined contained antigenic specificities not shared with
T, Hofstad, N, Skaug, T, Bjørnland
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The Variation of O Antigens in Gram-Negative Bacteria
2010The O antigen, consisting of many repeats of an oligosaccharide unit, is part of the lipopolysaccharide (LPS) in the outer membrane of Gram-negative bacteria. It is on the cell surface and appears to be a major target for both immune system and bacteriophages, and therefore becomes one of the most variable cell constituents.
Lei, Wang, Quan, Wang, Peter R, Reeves
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