title: Structure of a lactic acid ether-containing and glycerol phosphate-containing O-polysaccharide from Proteus mirabilis O40.
abstract: An O-polysaccharide was isolated by mild acid hydrolysis from the lipopolysaccharide of Proteus mirabilis O40 and studied by NMR spectroscopy, including 2D 1H, 1H COSY, TOCSY, ROESY, and 1H, 13C HMQC experiments, along with chemical methods. The polysaccharide was found to contain an ether of GlcNAc with lactic acid and glycerol phosphate in the main chain and to have the following structure: --> 3)-beta-D-GlcpNAc4(R-Lac)-(1 --> 3)-alpha-D-Galp-(1 --> 3)-D-Gro-1-P-(O --> 3)-beta-D-GlcpNAc-(1 --> where D-GlcpNAc4(R-Lac) stands for 2-acetamido-4-O-[(R)-1-carboxyethyl]-2-deoxy-D-glucose. This structure is unique among the known structures of the Proteus O-polysaccharides, which is in agreement with the classification of the strain studied into a separate O-serogroup. A serological relatedness of P. mirabilis O40 with some other Proteus strains was revealed and discussed in view of the O-polysaccharide structures.
authors.affiliation: N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, Moscow 119991, Russia. kondak@ioc.ac.ru
authors.forename: Anna N
authors.initials: AN
authors.lastname: Kondakova
authors.forename: Rafal
authors.initials: R
authors.lastname: Fudala
authors.forename: Sof'ya N
authors.initials: SN
authors.lastname: Senchenkova
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Shashkov
authors.forename: Yuriy A
authors.initials: YA
authors.lastname: Knirel
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Kaca
mesh_terms: D002240:Carbohydrate Sequence; D019344:Lactic Acid / Q000032:analysis; D008969:Molecular Sequence Data; D009005:Monosaccharides / Q000032:analysis; D019081:O Antigens / Q000737:chemistry* / Q000276:immunology / Q000302:isolation & purification; D010742:Phospholipid Ethers / Q000032:analysis; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000276:immunology / Q000302:isolation & purification; D011513:Proteus mirabilis / Q000737:chemistry / Q000145:classification* / Q000276:immunology
chemical_list: D009005:Monosaccharides; D019081:O Antigens; C504011:O-polysaccharide, Proteus mirabilis O40; D010742:Phospholipid Ethers; D011135:Polysaccharides, Bacterial; D019344:Lactic Acid