Structural characterization of the O-polysaccharide isolated from Franconibacter helveticus LMG23732T

Abstract The bacterial strain Franconibacter helveticus LMG 23732 T was previously misidentified as the neonatal pathogen Cronobacter zurichensis . O-polysaccharide (OPS) is a part of lipopolysaccharide (LPS), which is an important cell envelope compound of Gram-negative bacteria. OPS isolated from the bacterium Franconibacter helveticus LMG23732 T was characterized by chemical analyses as well as 1D and 2D NMR experiments. Compositional analyses indicated the presence of glucose and unusual 6-deoxy sugar - 6-deoxy-talose (6-dTal). The studied strain produced OPS, which consists of 6- l -dTal p in main chain and terminal d- Glc p as a branch: Download full-size image This is the first structural determination of the OPS isolated from genus Franconibacter .