Structural heterogeneity in the lipopolysaccharides of Pseudomonas syringae with O-polysaccharide chains having different repeating units

The structure of the O-polysaccharide from Pseudomonas stutzeri OX1 containing two different 4-acylamido-4,6-dideoxy-residues, tomosamine and perosamine

“…[19][20][21][22] Moreover, we have shown that the nonregularity of the structure of the polysaccharide fraction from the LPS of P. stutzeri OX1 depends on Fuc4N residues linked in a non-stoichiometric fashion. This confirms recent data on the occurrence of carbohydrate residues unsystematically attached to a carbohydrate chain, 21,22 which are used to mask the repetitiveness of the polymer besides usual non-carbohydrate groups (acetyl, phosphate, methyl groups).…”

The structure of the O-specific polysaccharide from the lipopolysaccharide of Aeromonas bestiarum strain 207

“…5) and followed from the chemical shifts d H 3.67-3.81 for H-5 and d C 70.14 for C-5 (compare published data 16,17 ).…”

The Structures of Lipopolysaccharides from Plant‐Associated Gram‐Negative Bacteria

“…[17][18][19][20][21][22][23][24][25][26][27][28] Almost every one of these OPSs possesses a backbone of rhamnose residues that can be present in either  or in  configuration and in α or β anomeric configuration; these last can be even found in the same structure. Overall, beside rhamnose, the repeating units show a very limited variability of residues and are often linear or bear a single branching monosaccharide.…”

“…Overall, beside rhamnose, the repeating units show a very limited variability of residues and are often linear or bear a single branching monosaccharide. In particular, in the case of Pseudomonas syringae (Ps), GlcNAc and Fuc3NAc can be found attached to the rhamnan chain [17][18][19] whereas in Xanthomonas OPS, Xyl and Fuc were also found. [21,[23][24][25][26] More variability occurs in Erwinia LPSs, in which Gal, Glc and Man can be found either in the main skeleton or in the side arms.…”