Eubacterium saburreum, polysaccharides

Deoxy-L-galactose (L-fucose) is common, and has only been found as the a- or )3-pyranoside. The rare D-fucose has, however, been found both as a-pyranoside, in the LPS frorn Pseudomonas cepacia serotypes B and E, and as a-furanoside, in the cell-wall antigen from Eubacterium saburreum L 452 and the O-antigens from different strains of Psuedomonas syrin-gae The a-furanoside, as in 3, has a cis relationship between the aglycon and OH-2. The corresponding P form has not yet been found. 6-Deoxy-o-and -L-talose are components of the extracellular polysaccharides from some strains of Butyrivibrio fibrisolvens and of the LPS from some strains of E. coli respectively. 

Three 3-amino-3,6-dideoxyhexoses, having the d- and L gluco and D-ga-lacto configurations, have been found. The two D-sugars are not very common, but occur in some 0-antigens for example, those from E. coli 0114 (Ref. 60) and E. coli 02 (Ref 61), respectively. The D-galacto isomer has also been found in the cell-wall polysaccharide from Eubacterium saburreum strain L13.3-Amino-3,6-dideoxy-L-glucose has been found in the core part of the Aeromonas hydrophila chemotype 111 LPS. 

Such a situation is rather common for D-galactose and the structurally related monosaccharides L-arabinose218 and D-fucose thus far, the latter monosaccharide has been identified only as the furanose form in the O-specific polysaccharide of Eubacterium saburreum.219 6-Deoxy-L-altrose is present as the pyranose in the lipopolysaccharide of Yersinia enteroco-litica,20 but as the furanose in a similar polymer220 of Y. pseudotuberculosis type VB. Paratose, which is usually present in polysaccharides as the a-pyranose, was identified as the /3-furanose in the O-specific polysaccharide221,222 of Y. pseudotuberculosis serotype IB. 

N. Sato, Nakazawa, M. Sato, I. Hoshino, and T. Ito, Structural studies of the antigenic polysaccharide of Eubacterium saburreum, strain T19, Carbohydr. Res., 245 (1993) 105-111. 

J. Hoffman, B. Lindberg, T. Hofstad, and H. Lygre, Structural studies of the polysaccharide antigen of Eubacterium saburreum, strain L452, Carbohydr. Res., 58 (1977) 439-442. 

W. Kondo, F. Nakasawa, M. Sato, and T. Ito, Structural studies of the antigenic polysaccharide of Eubacterium saburreum, strain T27, Carbohydr. Res., 117 (1983) 125-131 F. Nakasawa, Structural studies of the antigenic polysaccharide of Eubacterium saburreum, strain T17, Carbohydr. Res., 143 (1985) 185-190 F. Nakasawa and E. Hoshino, Immunochemical and structural characterization of the antigenic polysaccharide from Eubacterium saburreum T18, Oral Microbiol. Immunol., 7 (1992) 182-186. 

New type of biopolymer, not strictly a polysaccharide. Isol. from Eubacterium saburreum strain LI 3. 

Component of the antigenic polysaccharide prod, by Eubacterium saburreum and polysaccharide from Campylobacter jejuni. Foam. Md +20 (c, 1 in H2O). 

A combination of methylation analysis, oxidation with periodate, and partial hydrolysis with acid has shown that the polysaccharide antigen of Eubacterium saburreum 49 consists of a chain of (1 3)- and (1 6)-linked -D-glycero-... 

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