Structure of an acidic polysaccharide from the agar-decomposing marine bacterium Pseudoalteromonas atlantica strain IAM 14165 containing 5,7-diacetamido-3,5,7,9-tetradeoxy-L-glycero-L-manno-non-2-ulosonic acid

Carbohydr Res. 2005 Jan 17;340(1):69-74. doi: 10.1016/j.carres.2004.11.007.

Abstract

The structure of an acidic polysaccharide from Pseudoalteromonas atlantica strain 14165 containing 5,7-diacetamido-3,5,7,9-tetradeoxy-L-glycero-L-manno-non-2-ulosonic acid (di-N-acetylpseudaminic acid, Pse5Ac7Ac) has been elucidated. The polysaccharide was studied by 1H and 13C NMR spectroscopy, including 2D experiments, along with sugar and methylation analyses. After a selective hydrolysis a modified polysaccharide devoid of its side chain could be isolated. It was found that the polysaccharide has pentasaccharide repeating units with following structure: [structure: see text].

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Agar / metabolism*
  • Carbohydrate Sequence
  • Magnetic Resonance Spectroscopy
  • Molecular Sequence Data
  • Polysaccharides, Bacterial / chemistry*
  • Pseudoalteromonas / chemistry*
  • Pseudoalteromonas / classification*
  • Pseudoalteromonas / metabolism
  • Sialic Acids / analysis*
  • Sialic Acids / chemistry

Substances

  • 5,7-diacetamido-3,5,7,9-tetradeoxynon-2-ulosonic acid
  • Polysaccharides, Bacterial
  • Sialic Acids
  • Agar