Characterization of an extracellular polysaccharide from a xanthomonas species |
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Authors: | Toshiro Yadomae Haruki Yamada Toshio Miyazaki Toshihiro Ŏmori Tetsuji Hirota |
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Institution: | Department of Microbial Chemistry, Tokyo College of Pharmacy 1432-1 Horinouchi, Hachiōji, Tokyo 192-03 Japan;Technical Research Institute, Snow Brand Milk Products Co., Ltd., 1–2 Minamidai 1-chome Kawagoe, Saitama Prefecture 350 Japan |
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Abstract: | An extracellular polysaccharide containing glucose, mannose, D-manno-octulosonic acid (KDO), an unidentified component (X), and acetyl groups in the molar ratio of 1.3:3.8:1.6:1.1:2.9, was obtained from the incubated medium of a Xanthomonas species. The extracellular polysaccharide contained traces of phosphate and nitrogen but no lipid. Mild hydrolysis with 0.025M sulfuric acid released all of the KDO in the polysaccharide and a KDO-free product was obtained, which on hydrolysis with 0.05M sulfuric acid, gave mainly an oligosaccharide containing glucose, mannose, and X in molar ratio of 1:1:1. The reducing end-group of this oligosaccharide was X, and other hexose residues were linked (1 → 4). Compound X seems to be a 6-deoxyhexose that differs from fucose and rhamnose. |
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Keywords: | To whom inquiries should be addressed |
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