Chemical structure of the lipid A component of lipopolysaccharides from Fusobacterium nucleatum.
The lipid A component of lipopolysaccharides from Fusobacterium nucleatum Fev 1 consists of beta-1',6-linked D-glucosamine disaccharides, which carry two phosphate groups: one in glycosidic and one in ester linkage. The amino groups of the glucosamine disaccharides are substituted by D-3-hydroxyhexadecanoic acid. The hydroxyl groups of the disaccharide backbone are acylated by tetradecanoic, hexadecanoic, and D-3-hydroxytetradecanoic acids. Part of the ester-bound D-3-hydroxytetradecanoic acid is 3-O-substituted by tetradecanoic acid. Whereas a similar pattern of fatty acids was detected in lipopolysaccharides from two other F. nucleatum strains, the amide-bound fatty acid in F. varium and F. mortiferum was D-3-hydroxytetradecanoic acid. The chemical relationships of lipid A from Fusobacteria and other gram-negative bacteria are discussed.
D055598:Chemical Phenomena; D002621:Chemistry; D005227:Fatty Acids / Q000032:analysis; D005673:Fusobacterium / Q000032:analysis*; D008055:Lipids / Q000032:analysis; D008070:Lipopolysaccharides / Q000032:analysis*; D011135:Polysaccharides, Bacterial / Q000032:analysis*
D005227:Fatty Acids; D008055:Lipids; D008070:Lipopolysaccharides; D011135:Polysaccharides, Bacterial