title: Isolation and characterization of the lipopolysaccharide of Chromatium vinosum.
abstract: Lipolysaccharide was isolated from Chromatium vinosum by phenol/water extraction. The lipopolysaccharide is found exclusively in the phenol phase and can be cleaved into a sugar moiety and a lipid A fraction by hydrolysis in 10% acetic acid at 100 degrees C for 3-4 h. The sugar moiety contains the neutral sugars 3-O-methyl-D-ribose, D-ribose, L-arabinose, mannosamine and glucose, and smaller quantities of D-rhamnose, D-glycero-D-manno-heptose (tentatively identified), quinovosamine and 2-keto-3-deoxyoctonate. L-glycero-D-manno-heptose was not detected. The 2-keto-3-deoxyoctonate linkage in C. vinosum lipopolysaccharide is more resistant to acid hydrolysis than that of Escherichia coli. The lipid A fraction contains glucosamine, mannose and the fatty acids of the lipopolysaccharide. The major fatty acid is beta-hydroxymyristic acid, with smaller amounts of lauric and palmitic acids as well as 14-carbon mono-unsaturated fatty acid, also being present. The phosphorus content of the C. vinosum lipopolysaccharide was found to be approximately 0.1%. Erythrocytes sensitized with alkali-treated C. vinosum lipopolysaccharide were agglutinated by antisera prepared against heat-killed cells. Untreated or heat-treated lipopolysaccharide did not sensitize erythrocytes. The lethal toxicity to mice of the C. vinosum lipopolysaccharide is about one-tenth as that from Salmonella abortus equi.
mesh_terms: D000818:Animals; D001681:Biological Assay; D002241:Carbohydrates / Q000032:analysis; D002844:Chromatium / Q000032:analysis*; D004305:Dose-Response Relationship, Drug; D004912:Erythrocytes / Q000187:drug effects; D005227:Fatty Acids / Q000032:analysis; D006386:Hemagglutination Tests; D008070:Lipopolysaccharides / Q000302:isolation & purification / Q000494:pharmacology; D051379:Mice; D010710:Phosphates / Q000032:analysis; D011135:Polysaccharides, Bacterial / Q000302:isolation & purification / Q000494:pharmacology; D011817:Rabbits
chemical_list: D002241:Carbohydrates; D005227:Fatty Acids; D008070:Lipopolysaccharides; D010710:Phosphates; D011135:Polysaccharides, Bacterial