Results 271 to 280 of about 183,803 (290)
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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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Structure of the O-antigen of Yersinia pseudotuberculosis O:4a revised
Carbohydrate Research, 2009The O-specific polysaccharide was isolated by mild acid degradation of the lipopolysaccharide of Yersinia pseudotuberculosis O:4a and studied by NMR spectroscopy, including 2D ROESY and (1)H, (13)C HMBC experiments. The following structure of the pentasaccharide repeating unit of the polysaccharide was established, which differs from the structure ...
Rima Z. Shaikhutdinova +7 more
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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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Genetics, Biosynthesis and Assembly of O-Antigen
2011Lipopolysaccharide (LPS), a major component of the outer leaflet of the Gram-negative bacterial outer membrane [1], consists of lipid A, core oligosaccharide (OS), and O-specific polysaccharide or O-antigen [1,2]. LPS is a surface molecule unique to Gram-negative bacteria that plays a key role as an elicitor of innate immune responses, ranging from ...
Valvano, Miguel +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.
D Bryniok, K J Heller
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RELATION OF STRUCTURE TO FUNCTION IN BACTERIAL O‐ANTIGENS. VI. NEUTRALIZATION OF ENDOTOXIC O‐ANTIGENS BY HOMOLOGOUS O‐ANTIBODY* [PDF]
Annals of the New York Academy of Sciences, 1966 Nancy L. Neale +2 more
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Regulation of O-Antigen Biosynthesis in Yersinia enterocolitica
2006Lipopolysaccharide (LPS) is a glycolipid present in the outer membrane (OM) of Gram-negative bacteria. The LPS molecule consists of three regions: (i) the lipid A, a polar glycolipid in which a disaccharide backbone is replaced with six or seven fatty acid; (ii) the core, an oligosaccharide often rich in negatively charged groups and, (iii) the O ...
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Role of O-antigen variation in the immune response
Trends in Microbiology, 1995The O antigen is an extremely variable surface polysaccharide of Gram-negative bacteria. This variation is thought to allow the various clones of a species each to present a surface that offers a selective advantage in the niche occupied by that clone.
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Comparative Study of Typhoid O Antigens
American Journal of Clinical Pathology, 1965Dickinson C +3 more
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